Civil Engineering Surveying Quiz (or) MCQ

1 .

If deflection angles are measured in a closed traverse, the difference between the sum of the right-hand and that of the left hand angles should be equal to

A) 0°

B) 90°

C) 180°

D) 360°

Correct Answer : 360°

2 .

Metric chains are generally available in

A) 10 m and 20 m length

B) 15 m and 20 m length

C) 20 m and 30 m length

D) 25 m and 100 m length

Correct Answer : 20 m and 30 m length

3 .

A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 10⁶ kg/cm², the correction to be applied is

A) - 0.000909 m

B) + 0.0909 m

C) 0.000909 m

D) None of the above

Correct Answer : - 0.000909 m

4 .

The sensitiveness of a level tube decreases if_________.

A) diameter of the tube is increased

B) length of the vapour bubble is increased

C) radius of curvature of its inner surface is increased

D) both viscosity and surface tension are increased.

Correct Answer : both viscosity and surface tension are increased.

5 .

If Δ is the angle of deflection of a simple curve of radius R, the length of its long chord, is

A) R cos

\frac{∆}{2}

B) 2R cos

\frac{∆}{2}

C) R sin

\frac{∆}{2}

D) 2R sin

\frac{∆}{2}

Correct Answer : 2R sin $\frac{∆}{2}$

6 .

Pick up the correct statement from the following :

A) In surveys of large extent, the effect of curvature of the earth must be considered

B) The directions of plumb lines suspended at different points in a survey are not strictly parallel

C) In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal

D) All of the above

Correct Answer : All of the above

7 .

The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectively, is called

A) brightness of telescope

B) magnification of telescope

C) resolving power of telescope

D) None of the above

Correct Answer : resolving power of telescope

8 .

The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known

A) a simple curve

B) a reverse curve

C) a compound curve

D) a vertical curve

Correct Answer : a reverse curve

9 .

The first reading from a level station is

A) foresight

B) back-sight

C) any sight

D) intermediate sight

Correct Answer : back-sight

10 .

If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum deflection angle to locate its junction point, is

A) 1°43' 28"

B) 1°43' 08"

C) 1°43' 18"

D) 1°43' 38"

Correct Answer : 1°43' 28"

11 .

Locating the position of a plane table station with reference to three known points, is known as

A) resection method

B) radiation method

C) three point problem

D) intersection method

Correct Answer : three point problem

12 .

On a diagonal scale, it is possible to read up to

A) one dimension

B) two dimensions

C) three dimensions

D) four dimensions

Correct Answer : three dimensions

13 .

The bearing of AB is 190° and that of CB is 260° 30'. The included angle ABC, is

A) 70° 30'

B) 80° 30'

C) 99° 30'

D) None of the above

Correct Answer : 70° 30'

14 .

For true difference in elevations between two points A and B, the level must be set up

A) at any point between A and B

B) at the exact mid point of A and B

C) near the point A

D) near the point B

Correct Answer : at the exact mid point of A and B

15 .

In geodetic surveys higher accuracy is achieved, if

A) curvature of the earth surface is ignored

B) curvature of the earth surface is taken into account

C) angles between the curved lines are treated as plane angles

D) None of the above

Correct Answer : curvature of the earth surface is taken into account

16 .

Bergchrund is a topograhical feature in_________.

A) hills

B) plains

C) water bodies

D) glaciated region

Correct Answer : glaciated region

17 .

The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescope's

A) brightness

B) field of view

C) magnification

D) resolving power

Correct Answer : magnification

18 .

The bubble tube is nearly filled with_______

A) alcohol or chloroform

B) a liquid which is very mobile

C) a liquid having low freezing point

D) All off the above

Correct Answer : All off the above

19 .

The length of a traverse leg may be obtained by multiplying the latitude and

A) secant of its reduced bearing

B) sine of its reduced bearing

C) cosine of its reduced bearing

D) tangent of its reduced bearing

Correct Answer : secant of its reduced bearing

20 .

If D is the degree of the curve of radius R, the exact length of its specified chord, is

A) radius of the curve x sine of half the degree

B) diameter of the curve x sine of half the degree

C) diameter of the curve x cosine of half the degree

D) diameter of the curve x tangent of half the degree

Correct Answer : diameter of the curve x sine of half the degree

21 .

Correction per chain length of 100 links along a slope of α° is______.

A)

1.5 α^{3}

B)

\frac{1.5 a}{100}

C)

\frac{1.5 a^{2}}{100}

D)

\frac{1.5 a^{3}}{100}

Correct Answer : $\frac{1.5 a^{2}}{100}$

22 .

Plotting of inaccessible points on a plane table, is done by

A) radiation

B) intersection

C) traversing

D) None of the above

Correct Answer : intersection

23 .

A dumpy level is set up with its eye-piece vertically over a peg A. The height from the top of peg A to the centre of the eye-piece is 1.540 m and the reading on peg B is 0.705 m. The level is then setup over B. The height of the eye-piece above peg B is 1.490 m and a reading on A is 2.195 m. The difference in level between A and B is

A) 0.770 m

B) 0.785 m

C) 1.770 m

D) 3.030 m

Correct Answer : 0.770 m

24 .

The power of a lens ______

A) is reciprocal of its focal length

B) is positive if it is a convex lens

C) is negative if it is a concave lens

D) is measured in diopter

Correct Answer : is measured in diopter

25 .

ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is

A) 60°

B) 90°

C) 120°

D) 210°

Correct Answer : 210°

26 .

Determining the difference in elevation between two points on the surface of the earth, is known as_________

A) levelling

B) simple levelling

C) differential levelling

D) longitudinal levelling

Correct Answer : differential levelling

27 .

Contours of different elevations may cross each other only in the case of

A) a saddle

B) an over hanging cliff

C) a vertical cliff

D) an inclined plane

Correct Answer : an over hanging cliff

28 .

To orient a plane table at a point P roughly south of the mid-point of two inaccessible conical hill stations A and B in the plains, a point C is selected in line with AB and table is oriented at C by bringing ab in line with AB. A ray is then drawn towards P and at P the table is oriented by back ray method. The orientation so obtained, is

A) manifold and correct

A)

B) incorrect

B)

C) unique and correct

C)

D) not reliable

D)

Correct Answer : manifold and correct

29 .

Which one of the following statements is correct?

A) one vernier may be used if the readings of two verniers differ by a constant

B) the mean of the readings of the two verniers gives correct reading free from the eccentricity

C) when the axes of rotation of the graduated circle and the verniers are not coincident, the instrument possesses eccentricity

D) All of the above

Correct Answer : All of the above

30 .

Pick up the correct statement from the following :

A) 1 degree of arc corresponds to a displacement ratio of 1:57

B) 1 second of arc corresponds to a displacement ratio of 1:206, 300

C) the errors arising from the linear measures tend to be roughly proportional to the lengths of the lines

D) All of the above

Correct Answer : All of the above

Explanation : * 1 second of arc corresponds to a displacement ratio of 1:206, 300
* 1 degree of arc corresponds to a displacement ratio of 1:57
* the angular errors tend to propagate themselves along a traverse as the square root of the number of stations
* the errors arising from the linear measures tend to be roughly proportional to the lengths of the lines

31 .

Simpson's rule for calculating areas states that the area enclosed by a curvilinear figure divided into an even number of strips of equal width, is equal to

A) half the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets, and thrice the sum of the even offsets

B) one third the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets

C) one sixth the width of a strip, multiplied by the sum of the two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets

D) one third the width of a strip, multiplied by the sum of two extreme offsets, four times the sum of the remaining odd offsets, and twice the sum of the even offsets

Correct Answer : one third the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets

32 .

Pick up the correct statement from the following :

A) a refracting telescope consists optically of two lenses

B) the lens nearer the object to be viewed is convex and is called objective

C) the principal axes of both the lenses coincide the optical axis of the telescope

D) All of the above

Correct Answer : All of the above

33 .

If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is sloping

A) it is possible to set offsets correctly on both sides

B) it is possible to set offsets correctly on east side

C) it is possible to set offsets correctly on east side

D) it is not possible to set offsets correctly on west side

Correct Answer : it is possible to set offsets correctly on both sides

34 .

Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed (where k is in kilometers.)

A)

\pm 0.1 \sqrt{k} m m

B)

\pm 0.2 \sqrt{k} m m

C)

0.2 \sqrt{k} m m

D)

\pm 0.1 \sqrt{k}

Correct Answer : $0.2 \sqrt{k} m m$

35 .

The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is

A) 25.05

B) 14.52 secs

C) 28.8 secs

D) 41.25 secs

Correct Answer : 41.25 secs

36 .

If i is the stadia distance, f is the focal length and d is the distance between the objective and vertical axis of the techeometer, the multiplying constant, is

A) i/f

B) f/i

C) f/d

D) (f + d)

Correct Answer : f/i

37 .

Pick up the correct statement from the following :

A) the unit of power of the lens is diopter

B) the power of a lens is the reciprocal of its focal length

C) the power of two or more thin lenses in contact is the power of the combination of the lenses

D) All of the above

Correct Answer : All of the above

38 .

The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known

A) dip

B) azimuth

C) bearing

D) declination

Correct Answer : dip

39 .

A relatively fixed point of known elevation above datum, is called

A) datum point

B) reduced level

C) bench mark

D) reference point

Correct Answer : bench mark

40 .

In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to

A) line of collimation

B) axis of the telescope

C) line of sight

D) None of the above

Correct Answer : line of sight

41 .

If h is the difference in height between end points of a chain of length l, the required slope correction is

A)

\frac{h}{2 l}

B)

\frac{h^{2}}{2 l}

C)

\frac{h^{2}}{l}

D)

3 \frac{h^{2}}{2 l}

Correct Answer : $\frac{h^{2}}{2 l}$

42 .

Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the sight on the down-slope, must be less than

A) 15 m

B) 20 m

C) 25 m

D) 30 m

Correct Answer : 25 m

43 .

Permanent adjustments of a level are_____

A) 2 in number

B) 3 in number

C) 4 in number

D) 6 in number

Correct Answer : 2 in number

44 .

The chaining on sloping ground is_______

A) easier along the up gradient

B) easier along the falling gradient

C) equally convenient along falling as well as up gradient

D) All of the above

Correct Answer : easier along the falling gradient

45 .

In a constant level tube, size of the bubble remains constant because upper wall is_______

A) flat

B) convex downwards

C) of relatively smaller radius

D) of relatively larger radius

Correct Answer : of relatively larger radius

46 .

An internal focussing type surveying telescope, may be focussed by the movement of_________.

A) concave lens in the telescope

B) convex-lens in the telescope

C) objective glass of the telescope

D) plano-convex lens in the telescope

Correct Answer : concave lens in the telescope

47 .

The back staff reading on a B.M. of R.L. 500.000 m is 2.685 m. If foresight reading on a point is 1.345 m, the reduced level of the point, is

A) 504.030 m

B) 502.685 m

C) 501.340 m

D) 501.345 m

Correct Answer : 501.340 m

48 .

Cross hairs in surveying telescopes, are fitted

A) in the objective glass

B) in front of the eye piece.

C) at the centre of the telescope

D) at the optical centre of the eye piece

Correct Answer : in front of the eye piece.

49 .

For preparation of a contour plan for a route survey

A) method of cross profile is used

B) method of squares is used

C) method of trace contour is used

D) indirect method of contouring is used

Correct Answer : method of cross profile is used

50 .

The zero of the graduated circle of a prismatic compass is located at_______.

A) east end

B) west end

C) north end

D) south end

Correct Answer : south end

51 .

Pick up the correct statement from the following :

A) Cross staff is used for setting out right angles

B) Gradiometer is used for setting out any required gradient

C) Box sextant is used for the measurement of horizontal angles

D) All of the above

Correct Answer : All of the above

Explanation : * Cross staff is used for setting out right angles
* Gradiometer is used for setting out any required gradient
* Box sextant is used for the measurement of horizontal angles
* Line ranger is used for locating intermediate stations on a survey line

52 .

For a closed traverse the omitted measurements may be calculated_______.

A) length of one side only

B) bearing of one side only

C) both length and bearing of one side

D) All of the above

Correct Answer : All of the above

Explanation : * length of one side only
* bearing of one side only
* both length and bearing of one side
* length or bearing of adjacent side

53 .

The radius of a simple circular curve is 300 m and length of its specified chord is 30 m. The degree of the curve is_____.

A) 3.57°

B) 3.75°

C) 5.73°

D) 5.37°

Correct Answer : 5.73°

54 .

During levelling if back sight is more than foresight ________.

A) The forward staff is at lower point

B) The back staff is at lower point

C) The difference in level, cannot be ascertained

D) None of the above

Correct Answer : The back staff is at lower point

55 .

Two contour lines, having the same elevation__________

A) can unite together

B) can cross each other

C) cannot unite together

D) cannot cross each other

Correct Answer : can unite together

56 .

The surface of zero elevation around the earth, which is slightly irregular and curved, is known as_______.

A) geoid surface

B) level surface

C) mean sea level

D) horizontal surface

Correct Answer : geoid surface

57 .

Profile levelling is usually done for determining_________.

A) contours of an area

B) boundaries of property

C) capacity of a reservoir

D) elevations along a straight line

Correct Answer : elevations along a straight line

58 .

For indirect ranging, number of ranging rods required, is_________.

A) 2

B) 3

C) 4

D) 5

Correct Answer : 4

59 .

Correction per chain length of 100 links along a slope having a rise of 1 unit in n horizontal units, is_____.

A) 100 n²

B)

\frac{100}{n}

C)

\frac{100}{n^{2}}

D)

\frac{100}{n^{3}}

Correct Answer : $\frac{100}{n^{2}}$

60 .

Prismatic compass is considered more accurate than a surveyor's compass, because_______.

A) it is provided with a better magnetic needle

B) it is provided with a prism to facilitate reading of its graduated circle

C) its graduations are in whole circle bearings

D) it is provided with a sliding glass in the object vane

Correct Answer : it is provided with a prism to facilitate reading of its graduated circle

61 .

In chain surveying, perpendiculars to the chain line, are set out by_______.

A) an optical square

B) a level

C) a theodolite

D) a prismatic compass

Correct Answer : an optical square

62 .

It is more difficult to obtain good results while measuringhorizontal distance by stepping

A) down-hill

B) up-hill

C) in plane areas

D) in low undulations

Correct Answer : up-hill

63 .

The additional lines which are measured to show the correctness of the chain surveying are called :

A) tie lines

B) proof lines

C) check clines

D) All of the above

Correct Answer : All of the above

64 .

Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves_____.

A) earth work on the centre line

B) embankment on the centre line

C) excavation on the centre line

D) None of the above

Correct Answer : excavation on the centre line

65 .

The ratio of the linear displacement at the end of a line, subtended by an arc of one second to the length of the line, is_______.

A) 1:57

B) 1:100

C) 1:3440

D) 1:206 300

Correct Answer : 1:206 300

66 .

The slope correction for a length of 30 m along a gradient of 1 in 20, is______.

A) 3.75 cm

B) 0.375 cm

C) 2.75 cm

D) 37.5 cm

Correct Answer : 3.75 cm

67 .

The main principle of surveying is to work

A) from part to the whole

B) from whole to the part

C) from lower level to higher level

D) from higher level to the lower level

Correct Answer : from whole to the part

68 .

The representation of general topography of a very flat terrain is possible only_______.

A) by drawing contours at large interval

B) by drawing contours at small interval

C) by giving spot levels at large interval

D) by giving spot levels to salient features at close interval

Correct Answer : by giving spot levels to salient features at close interval

69 .

The operation of resection involves the following steps

1. rough orientation of the plane table
2. the three lines form a triangle of error
3. drawing lines back through the three control points
4. select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise
5. the points obtained by three rays is the correct location.

The correct sequence is

A) 1, 3, 2, 4, 5

A)

B) 1, 2, 3, 4, 5

B)

C) 1, 4, 3, 2, 5

C)

D) 1, 4, 2, 3, 5

D)

Correct Answer : 1, 3, 2, 4, 5

70 .

In reciprocal levelling, the error which is not completely eliminated, is due to_______.

A) earth's curvature

B) non-adjustment of the bubble tube

C) refraction

D) non-adjustment of line of collimation

Correct Answer : refraction

71 .

The difference in the lengths of an arc and its subtended chord on the earth surface for a distance of 18.2 km, is only_______.

A) 1 cm

B) 5 cm

C) 10 cm

D) 100 cm

Correct Answer : 10 cm

72 .

The line normal to the plumb line is known as________.

A) level line

B) datum line

C) vertical line

D) horizontal line

Correct Answer : level line

73 .

The angle of intersection of a curve is the angle between________.

A) forward tangent and long chord

B) back tangent and forward tangent

C) back tangent and long chord

D) prolongation of back tangent and forward tangent

Correct Answer : back tangent and forward tangent

74 .

Measuring with a 30 m chain, 0.01 m too short, introduces_______

A) positive cumulative error

B) negative cumulative error

C) positive compensating error

D) negative compensating error

Correct Answer : positive cumulative error

75 .

The co-ordinate of a point measured perpendicular to the parallel, is called________

A) total departure

B) meridian distance

C) consecutive co-ordinate

D) total latitude

Correct Answer : total latitude

76 .

For the construction of highway (or railway)

A) cross sections are required

B) longitudinal sections are required

C) both longitudinal and cross sections are required

D) None of the above

Correct Answer : both longitudinal and cross sections are required

77 .

If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.

A) R/10

B) R/15

C) R/20

D) R/25

Correct Answer : R/20

78 .

The bearing of line AB is 152° 30' and angle ABC measured clockwise is 124° 28'. The bearing of BC is_______.

A) 27° 52'

B) 96° 58'

C) 148° 08'

D) 186° 58'

Correct Answer : 96° 58'

79 .

To avoid large centering error with very short legs, observations are generally made

A) to chain pins

B) by using optical system for centering the theodolite

C) to a target fixed on theodolite tripod on which theodolite may be fitted easily

D) All of the above

Correct Answer : to a target fixed on theodolite tripod on which theodolite may be fitted easily

80 .

During secular variation of magnetic meridian at different places

A) range of oscillations is constant

B) period of oscillation is constant

C) period of oscillation only varies

D) range and period of oscillation both vary

Correct Answer : range and period of oscillation both vary

81 .

In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to_______.

A) facility of holding

B) ease of reduction of observations

C) minimum effect of careless holding on the result

D) None of the above

Correct Answer : minimum effect of careless holding on the result

82 .

In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to_______.

A) facility of holding

B) ease of reduction of observations

C) minimum effect of careless holding on the result

D) None of the above

Correct Answer : minimum effect of careless holding on the result

83 .

The boundary of water of a still lake, represents

A) contour line

B) level surface

C) horizontal surface

D) a concave surface

Correct Answer : contour line

84 .

Planimeter is used for measuring____.

A) area

B) volume

C) slope angle

D) contour gradient

Correct Answer : area

85 .

In a perfect prismatic compass______.

A) needle is always kept sensitive

B) magnetic axis and geometric axis of the needle coincide

C) ends of the needle and pivot are in same vertical and horizontal planes

D) All of the above

Correct Answer : All of the above

Explanation : * needle is always kept sensitive
* magnetic axis and geometric axis of the needle coincide
* ends of the needle and pivot are in same vertical and horizontal planes
* pivot is vertically over the centre of the graduated circle

86 .

Setting out a curve by two theodolite method, involves

A) linear measurements only

B) angular measurements only

C) both linear and angular measurements

D) None of the above

Correct Answer : angular measurements only

87 .

When the bubble of the level tube of a level, remains central

A) line of collimation is horizontal

B) axis of the telescope is horizontal

C) line of sight is horizontal

D) geometrical axis of the telescope is horizontal

Correct Answer : line of sight is horizontal

88 .

The magnetic meridian at any point, is the direction indicated by a freely suspended

A) magnetic needle

B) magnetic needle over an iron pivot

C) and properly balanced magnetic needle

D) properly balanced and uninfluenced by local attractive force

Correct Answer : properly balanced and uninfluenced by local attractive force

89 .

The most reliable method of plotting a theodolite traverse, is_________.

A) by independent co-ordinates of each station

B) by the tangent method of plotting

C) by consecutive co-ordinates of each station

D) by plotting included angles and scaling off each traverse leg

Correct Answer : by independent co-ordinates of each station

90 .

The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to

A) the distance between the zero of gradient and the foot of the staff

B) twice the distance between the zero of graduation and the foot of the staff

C) thrice the distance between the zero of graduation and the foot of the staff

D) None of the above

Correct Answer : twice the distance between the zero of graduation and the foot of the staff

91 .

A transit is oriented by setting its vernier A to read the back azimuth of the preceding line. A back sight on the preceding transit station taken and transit is rotated about its vertical axis. The vernier A reads

A) azimuth of the forward line

B) bearing of the. forward line

C) back bearing of the forward line

D) equal to 360°-azimuth of the forward line.

Correct Answer : azimuth of the forward line

92 .

Designation of a curve is made by :

A) curvature of the curve

B) angle subtended by a chord of any length

C) radius of the curve

D) angle subtended by an arc of specified length

Correct Answer : radius of the curve

93 .

Removal of parallax, may be achieved by focussing

A) the eye-piece

B) the objective

C) the objective and the eye-piece

D) None of the above

Correct Answer : the objective and the eye-piece

94 .

Pick up the correct statement from the following :

A) A level line lies in level surface

B) A horizontal line is tangential to the level surface

C) A level surface is perpendicular at all points to the direction of gravity

D) All of the above

Correct Answer : All of the above

Explanation : * A level line lies in level surface
* A horizontal line is tangential to the level surface
* A level surface is perpendicular at all points to the direction of gravity
* A horizontal surface is normal to the direction of gravity at only one point

95 .

Diaphragm of a surveying telescope is held inside

A) objective

B) telescope at the end nearer the eye-piece

C) eye-piece

D) telescope tube at its mid point

Correct Answer : telescope at the end nearer the eye-piece

96 .

The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as

A) chromatic aberration

B) coma

C) astigmatism

D) spherical aberration

Correct Answer : chromatic aberration

97 .

If + 0.8% grade meets - 0.7% grade and the rate of change of grade for 30 m distance is 0.05, the length of the vertical curve will be

A) 600 m

B) 700 m

C) 800 m

D) 900 m

Correct Answer : 900 m

98 .

The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every______

A) 100 sq. km of area

B) 150 sq. km of area

C) 200 sq. km of area

D) None of the above

Correct Answer : 200 sq. km of area

99 .

If the radius of a simple curve is 600 m, the maximum length of the chord for calculating offsets, is taken_____

A) 15 m

B) 20 m

C) 25 m

D) 30 m

Correct Answer : 30 m

100 .

Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to____

A) 14.14

B) 28.28 m

C) 200 m

D) None of the above

Correct Answer : 28.28 m

101 .

The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is____.

A) 102°

B) 78°

C) 45°

D) None of the above

Correct Answer : 102°

102 .

Accuracy of 'fix' by two point problem, is__________.

A) good

B) bad

C) unique

D) not reliable

Correct Answer : not reliable

103 .

Correction per chain length of 100 links along a slope of α radians, is______.

A) 100 α

B) 100 α⁻¹

C) 100 α²

D) 100 α³

Correct Answer : 100 α

104 .

While working on a plane table, the correct rule is :

A) Draw continuous lines from all instrument stations

B) Draw short rays sufficient to contain the points sought

C) Intersection should be obtained by actually drawing second rays

D) Take maximum number of sights as possible from each station to distant objects

Correct Answer : Draw short rays sufficient to contain the points sought

105 .

If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by

A) taking short legs

B) making repeated observations of angular and linear measurements

C) making a subsidiary traverse to determine the length of a long leg

D) All of the above

Correct Answer : making a subsidiary traverse to determine the length of a long leg

106 .

Perpendicular offset from a tangent to the junction of a transition curve and circular curve is equal to_______.

A) shift

B) twice the shift

C) thrice the shift

D) four times the shift

Correct Answer : four times the shift

107 .

The direction of steepest slope on a contour, is________.

A) along the contour

B) at right angles to the contour

C) at an angle of 45° to the contour

D) None of the above

Correct Answer : at right angles to the contour

108 .

Back bearing of a line is equal to_______.

A) Fore bearing ± 90°

B) Fore bearing ± 270°

C) Fore bearing ± 180°

D) Fore bearing ± 360°

Correct Answer : Fore bearing ± 180°

109 .

While surveying a plot of land by plane tabling, the field observations________.

A) and plotting proceed simultaneously

B) and plotting do not proceed simultaneously

C) and recorded in field books to be plotted later

D) All of the above

Correct Answer : and plotting proceed simultaneously

110 .

If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on________.

A) staff normal

B) staff vertical

C) staff normal as well as vertical

D) None of the above

Correct Answer : staff normal

111 .

If the length of a chain line along a slope of θ° is l, the required slope correction is_________.

A) l cos² θ/2

B) l tan² θ/2

C) 2l cos² θ/2

D) 2l sin² θ/2

Correct Answer : 2l sin² θ/2

112 .

The included angles of a theodolite traverse, are generally measured______.

A) clockwise from the forward station

B) clockwise from the back station

C) anti-clockwise from the back station

D) anti-clockwise from the forward station

Correct Answer : clockwise from the back station

113 .

Location of contour gradient for a high way is best set out from_________.

A) bottom to the ridge

B) ridge down the hill

C) saddle down the hill

D) bottom to the saddle

Correct Answer : saddle down the hill

114 .

If h1 and h2 are the differences in level between ground and the formation levels, m is the slope of the sloping sides. D is the distance between the cross sections then, prismoidal correction for a level section is_______.

A) D/2m(h₁ - h₂)

B) D/3m(h₁ - h₂)

C) D/6m(h₁ - h₂)²

D) D/6m(h₁ - h₂)³

Correct Answer : D/6m(h₁ - h₂)²

115 .

The systematic errors which persist and have regular effects in the performance of a survey operation, are due to_________.

A) faulty instrument

B) inattention

C) carelessness

D) None of the above

Correct Answer : faulty instrument

116 .

The best method of interpolation of contours, is by_________.

A) estimation

B) computation

C) graphical means

D) All of the above

Correct Answer : computation

117 .

Pick up the correct specification of Ramsden eyepiece from the following :

A) it consists of two equal piano convex lenses

B) the curved surfaces of plano-convex lenses face each other

C) the two lenses are separated by a distance equal to 2/3 of the focal length of either lens.

D) All of the above

Correct Answer : All of the above

Explanation : * it consists of two equal piano convex lenses
* the curved surfaces of plano-convex lenses face each other
* the two lenses are separated by a distance equal to 2/3 of the focal length of either lens.
* the distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam

118 .

Greater accuracy in linear measurements, is obtained by______.

A) tacheometry

B) direct chaining

C) direct taping

D) All of the above

Correct Answer : direct taping

119 .

A bearing of a line is also known as_______.

A) azimuth

B) true bearing

C) reduced bearing

D) magnetic bearing

Correct Answer : azimuth

120 .

In case of a double line river, contours are__________.

A) drawn across the water

B) stopped at the banks of the river

C) stopped at the edge of the river

D) drawn by parabolic curves having their vertex at the centre of the water

Correct Answer : stopped at the edge of the river

121 .

In case of a direct vernier scale________.

A) smallest division is longer than smallest division of the main scale

B) graduations increase in the same direction in which graduations of the main scale increase

C) graduations increase in opposite direction in which graduations of the main scale increase

D) None of the above

Correct Answer : graduations increase in the same direction in which graduations of the main scale increase

122 .

Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by__________.

A) degree of the curve

B) square of the degree of the curve

C) inverse of the degree of the curve

D) None of the above

Correct Answer : degree of the curve

123 .

In an internal focusing telescope

A) the objective is at a fixed distance from the diaphragm

B) the focusing is done by the sliding of a divergent lens

C) the focusing divergent lens is situated at about the middle of the tube

D) All of the above

Correct Answer : All of the above

124 .

The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly_____.

A) 0.053 m

B) 0.063 m

C) 0.073 m

D) 0.083 m

Correct Answer : 0.083 m

125 .

The angle of intersection of a contour and a ridge line, is______.

A) 90°

B) 60°

C) 45°

D) 30°

Correct Answer : 90°

126 .

In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is_____

A) 8.24 cm

B) 7.24 cm

C) 6.24 cm

D) 5.24 cm

Correct Answer : 7.24 cm

127 .

Under ordinary conditions, the precision of a theodolite traverse is affected by______.

A) accidental linear errors

B) systematic angular errors

C) systematic linear errors

D) accidental angular errors

Correct Answer : systematic linear errors

128 .

Stadia techeometry was discovered by James Watt in the year.

A) 1670

B) 1770

C) 1870

D) 1970

Correct Answer : 1770

129 .

The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known

A) balancing the sights

B) balancing the latitudes

C) balancing the departures

D) balancing the traverse

Correct Answer : balancing the traverse

130 .

Orientation of a plane table by solving two point problem is only adopted when

A) given points are inaccessible

B) saving of time is a main factor

C) better accuracy is a main factor

D) None of the above

Correct Answer : given points are inaccessible

131 .

From any point on the surface with a given inclination___________.

A) two contour gradients are possible

B) indefinite contour gradients are possible

C) only one contour gradient is possible

D) All of the above

Correct Answer : indefinite contour gradients are possible

132 .

Angles to a given pivot station observed from a number of traverse stations when plotted, the lines to the pivot station intersect at a common point

A) linear measurements are correct and not the angular measurements

B) angular measurements are correct and not the linear measurements

C) angular and linear measurements are correct and not the plotting of traverse

D) angular and linear measurements and also plotting of the traverse are correct

Correct Answer : angular and linear measurements and also plotting of the traverse are correct

133 .

True meridians are generally preferred to magnetic meridians because_______.

A) these converge to a point

B) these change due to change in time

C) these remain constant

D) None of the above

Correct Answer : these remain constant

134 .

Pick up the correct statement from the following :

A) the apparent error on reversal is twice the actual error

B) the correction may be made equal to half the observed discrepancy

C) the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results

D) All of the above

Correct Answer : All of the above

135 .

The line of collimation method of reduction of levels, does not provide a check on_______.

A) intermediate sights

B) back sights

C) fore sights

D) reduced levels

Correct Answer : intermediate sights

136 .

The longitudinal section of the surface of bubble tube is________.

A) elliptic

B) circular

C) straight

D) parabolic

Correct Answer : circular

137 .

Imaginary line passing through points having equal magnetic declination is termed as_______.

A) isogon

B) agonic line

C) isoclinic line

D) None of the above

Correct Answer : isogon

138 .

The area of any irregular figure of the plotted map is measured with________.

A) sextant

B) pentagraph

C) planimeter

D) clinometer

Correct Answer : planimeter

139 .

The bearing of lines OA and OB are 16° 10' and 332° 18', the value of the included angle BOA is

A) 158° 28'

B) 316° 10'

C) 348° 08'

D) 43° 52'

Correct Answer : 43° 52'

140 .

The properties of autogenous curve for automobiles are given by__________.

A) true spiral

B) cubic parabola

C) clothoid spiral

D) Bernoulli's Lemniscate

Correct Answer : Bernoulli's Lemniscate

141 .

A back sight_________.

A) taken on an inverted staff is treated as negative

B) is added to the known level to obtain the instrument height

C) is always taken on a point of known elevation or can be computed

D) All of the above

Correct Answer : All of the above

142 .

The diaphragm of a stadia theodolite is fitted with two additional_______.

A) vertical hairs

B) horizontal hairs

C) horizontal and two vertical hairs

D) None of the above

Correct Answer : horizontal hairs

143 .

Reduced bearing of a line is an angle between_____.

A) east or west and the given line

B) north line and given line measured clockwise

C) north line and given line measured anticlockwise

D) given line and the part of the meridian whether N end or S end, lying adjacent to it.

Correct Answer : given line and the part of the meridian whether N end or S end, lying adjacent to it.

144 .

While measuring with a metallic tape of 30 m length pull should be applied_________.

A) 1 kg

B) 2 kg

C) 3 kg

D) 4 kg

Correct Answer : 3 kg

145 .

If θ is the slope of the ground and l is the measured distance, the correction is_______.

A) 2l sin² θ/2

B) 2l cos² θ/2

C) 2l tan² θ/2

D) 2l cot² θ/2

Correct Answer : 2l sin² θ/2

146 .

In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by_______.

A) adding 180°, if the given bearing is less than 180°

B) subtracting 180°, if the given bearing, is more than 180°

C) changing the cardinal points, i.e. substituting N for S and E for W and vice-versa

D) None of the above

Correct Answer : changing the cardinal points, i.e. substituting N for S and E for W and vice-versa

147 .

The method of reversal_________.

A) makes the erroneous relationship between parts evident

B) is usually directed to examine whether a certain part is truly parallel or perpendicular to another

C) Both (A) and (B)

D) Neither (A) nor (B)

Correct Answer : Both (A) and (B)

148 .

A theodolite is said to be in perfect adjustment if_________.

A) rotation axis is vertical to the transit axis

B) transit axis is perpendicular to line of collimation

C) line of collimation sweeps out a vertical plane while the telescope is elevated or depressed

D) All of the above

Correct Answer : All of the above

149 .

While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates

A) the trummion axis is horizontal

B) the rotation axis is vertical

C) the line of collimation is perpendicular to vertical axis

D) None of the above

Correct Answer : the rotation axis is vertical

150 .

The curvature of the earth's surface, is taken into account only if the extent of survey is more than_______.

A) 100 sq km

B) 160 sq km

C) 200 sq km

D) 260 sq km

Correct Answer : 260 sq km

151 .

The slope correction for a 3° slope for a length of 100 m, is

A) -0.11 m

B) -0.12 m

C) -1.87 m

D) -0.137 m

Correct Answer : -0.137 m

Explanation : Slope correction = -L(1-cos α). Where L Slope Distance, α Slope angle

(Slope correction is always negative).

= -100(1-cos 3°)

= -0.137

152 .

Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the reduced level of Y is_________.

A) 104.5 m

B) 104.0 m

C) 105.5 m

D) 105.0 m

Correct Answer : 104.5 m

153 .

The constant vertical distance between two adjacent contours, is called______

A) horizontal interval

B) contour interval

C) vertical equivalent

D) horizontal equivalent

Correct Answer : contour interval

154 .

Centering error of a theodolite produces an error___________.

A) in all angles equally

B) which does not vary with the direction or pointing

C) which varies with the direction of pointing and inversely with the length of sight

D) None of the above

Correct Answer : which varies with the direction of pointing and inversely with the length of sight

155 .

In levelling operation__________.

A) if second reading is more than first, it represents a rise

B) if first reading is more than second, it represents a rise

C) if first reading is less than second, it represents a fall

D) Both (B) and (C)

Correct Answer : Both (B) and (C)

156 .

Keeping the instrument height as 1 1/2m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than

A) 45 m

B) 20 m

C) 10 m

D) 25 cm

Correct Answer : 45 m

157 .

In a lemniscate curve the ratio of the angle between the tangent at the end of the polar ray and the straight, and the angle between the polar ray and the straight, is______.

A) 3

B) 4

C) 5

D) 3/2

Correct Answer : 3/2

158 .

Ranging in chain survey means______.

A) determining the offset distance

B) establishing an intermediate point on the line

C) determining the distance between end points

D) looking at an isolated point not on the line

Correct Answer : establishing an intermediate point on the line

159 .

Pick up the correct statement from the following :

A) the theodolite in which telescope can be rotated in vertical plane is called a transit

B) when the vertical circle is to the left of the telescope during observation, it is called to be in left face

C) when the vertical circle is to the right of the telescope during observation, it is called to be in right face

D) All of the above

Correct Answer : All of the above

160 .

Pick up the method of surveying in which field observations and plotting proceed simultaneously from the following

A) compass surveying

B) chain surveying

C) plan table surveying

D) tacheometric surveying

Correct Answer : plan table surveying

161 .

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is

A) said to have parallax

B) correctly focussed

C) free from parallax

D) not correctly focussed

Correct Answer : said to have parallax

162 .

You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of

A) exactness

B) repetition

C) reiteration

D) double observations

Correct Answer : repetition

163 .

The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto_______.

A) 20"

B) 15"

C) 10"

D) 5"

Correct Answer : 20"

164 .

Pick up the correct statement from the following :

A) the staff readings are measurements made vertically downwards from a horizontal plane

B) the lines of sight while observing back sight and fore sight lie in the same horizontal plane

C) the horizontal plane with reference to which staff readings are taken, coincides with the level surface through the telescope axis

D) All of the above

Correct Answer : All of the above

165 .

In horizontal angles, the error due to imperfect levelling of the plate bubble is

A) large for long sights

B) less for steeply inclined sights

C) large for steeply inclined sights

D) large when sights are nearly level

Correct Answer : large for steeply inclined sights

166 .

The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in_______.

A) triangulation

B) traverse method of surveys

C) chain surveying

D) None of the above

Correct Answer : chain surveying

167 .

The reduced level of a floor is 99.995 m, the staff reading on the floor is 1.505 m. If the inverted staff reading against the roof is 1.795 m, the floor level below the slab, is______.

A) 2.790 m

B) 3.300 m

C) 3.275 m

D) 3.290 m

Correct Answer : 3.300 m

168 .

The correction to be applied to each 30 metre chain length along θ° slope, is

A) 30 (sec θ - 1) m

B) 30 (sin θ - 1) m

C) 30 (cos θ - 1) m

D) 30 (tan θ - 1) m

Correct Answer : 30 (sec θ - 1) m

169 .

Resolving power of a telescope depends on_____

A) the diameter of the aperture

B) the pupil aperture of the eye

C) the diameter of the object glass

D) All of the above

Correct Answer : All of the above

170 .

True meridian of different places

A) run parallel to each other

B) converge from the south pole to the north pole

C) converge from the equator to the poles

D) converge from the north pole to the south pole

Correct Answer : converge from the equator to the poles

171 .

Two hill tops A and B 20 km apart are intervened by a third top C. If the top most contour of the three hill tops are of the same value, state whether the line of sight AB

A) grazes the hill top C

B) passes below the hill top C

C) passes clear of hill top C

D) None of the above

Correct Answer : passes below the hill top C

172 .

Accurate measurement of deflection angles with a transit not properly adjusted may be made by_________.

A) setting the vernier A at zero at back station and then plunging the telescope

B) setting the vernier A at zero at back station and turning the instrument to the forward station

C) taking two back sights one with the telescope normal and the other with telescope inverted

D) None of the above

Correct Answer : taking two back sights one with the telescope normal and the other with telescope inverted

173 .

If whole circle bearing of a line is 120°, its reduced bearing is______.

A) S 60° E

B) N 60° E

C) S 20° E

D) N 120° E

Correct Answer : S 60° E

174 .

Magnetic bearing of a survey line at any place______.

A) remains constant

B) changes systematically

C) is always greater than true bearing

D) varies differently in different months of the year

Correct Answer : varies differently in different months of the year

175 .

In chain surveying field work is limited to________.

A) linear measurements only

B) angular measurements only

C) both linear and angular measurements

D) All of the above

Correct Answer : linear measurements only

176 .

If the plane table is not horizontal in a direction at right angles to the alidade, the line of sight is parallel to the fiducial edge only for

A) inclined sights upward

B) horizontal sights

C) inclined sight downward

D) None of the above

Correct Answer : horizontal sights

177 .

If the whole circle bearing of a line is 180°, its reduced bearing is_______.

A) N

B) S

C) S 0° E

D) S 0° W

Correct Answer : S

178 .

A traverse deflection angle is______.

A) less than 90°

B) more than 90° but less than 180°

C) the difference between the included angle and 180°

D) the difference between 360° and the included angle

Correct Answer : the difference between the included angle and 180°

179 .

While measuring a chain line between two stations A and B intervened by a raised ground_____.

A) vision gets obstructed

B) chaining gets obstructed

C) both vision and chaining get obstructed

D) All of the above

Correct Answer : vision gets obstructed

180 .

The Random errors tend to accumulate proportionally to________.

A) numbers of operations involved

B) reciprocal of operations involved

C) cube root of the number of operation involved

D) square root of the number of operation involved

Correct Answer : square root of the number of operation involved

181 .

In a precision traverse, included angles are measured by setting the vernier______.

A) to read 5° exactly on back station

B) to read zero exactly on back station

C) some where near zero and reading both verniers on back station

D) All of the above

Correct Answer : some where near zero and reading both verniers on back station

182 .

If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is

A) 3.70 m

B) 2.70 m

C) 1.70 m

D) 0.70 m

Correct Answer : 2.70 m

183 .

The 10 mm markings on a levelling staff placed at 20 m are separated by________

A) 1/1000 radian

B) 1/1500 radian

C) 1/2000 radian

D) 1/2500 radian

Correct Answer : 1/2000 radian

184 .

A lens or combination of lenses in which the following defect is completely eliminated is called aplanatic______.

A) spherical aberration

B) coma

C) astigmatism

D) chromatic aberration

Correct Answer : spherical aberration

185 .

In optical reading instruments_________.

A) the vertical circle is usually continuous from 0° to 359°

B) the readings increase when the telescope is elevated in the face left position

C) the readings decrease when the telescope is elevated in the face right position

D) All of the above

Correct Answer : All of the above

186 .

Perpendicularity of an offset may be judged by eye, if the length of the offset is

A) 20 m

B) 15 m

C) 10 m

D) 5 m

Correct Answer : 15 m

187 .

The bearings of two traverse legs AB and BC are N52° 45' E and N34° 30' E respectively. The deflection angle is_______.

A) 18° 15' W

B) 18° 15' N

C) 18° 15' L

D) 18° 15' R

Correct Answer : 18° 15' L

188 .

A lemniscate curve will not be transitional throughout, if its deflection angle, is______.

A) 45°

B) 90°

C) 120°

D) 180°

Correct Answer : 45°

189 .

Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is_____.

A) 10 cm

B) 20 cm

C) 30 cm

D) 40 cm

Correct Answer : 30 cm

190 .

One of the tacheometric constants is additive, the other constant, is

A) dividing constant

B) subtractive constant

C) indicative constant

D) multiplying constant

Correct Answer : multiplying constant

191 .

The limiting length of an offset does not depend upon_______.

A) scale of plotting

B) indefinite features to be surveyed

C) accuracy of the work

D) method of setting out perpendiculars

Correct Answer : indefinite features to be surveyed

192 .

The chord of a curve less than peg interval, is known as

A) short chord

B) sub-chord

C) small chord

D) normal chord

Correct Answer : sub-chord

193 .

Mistakes which may produce a very serious effect upon the final results arise due to_______.

A) carelessness

B) in attention

C) in experience

D) All of the above

Correct Answer : All of the above

194 .

The true meridian of a place is the line in which earth's surface is intersected by a plane through____.

A) zenith and nadir points

B) east and west points

C) north and south geographical poles

D) north and south magnetic poles

Correct Answer : north and south geographical poles

195 .

The least count of a vernier scale is_______.

A) value of one division of the primary scale divided by total number of divisions of vernier scale

B) sum of the smallest divisions of main and vernier scales

C) value of one division of vernier scale divided by total number of divisions of primary scale

D) None of the above

Correct Answer : value of one division of the primary scale divided by total number of divisions of vernier scale

196 .

The magnetic bearing of a line is 32° and the magnetic declination is 10° 15' W. The true bearing is______.

A) 21° 45'

B) 42° 15'

C) 42° 15' W

D) 21° 45' W

Correct Answer : 21° 45'

197 .

Straight, parallel and widely spaced contours represent

A) a flat surface

B) an inclined plane surface

C) curved surface

D) a steep surface

Correct Answer : an inclined plane surface

198 .

The theodolites used for making tacheometric observations by optical wedge system, are____.

A) not provided with stadia hairs at all

B) fitted with a glass wedge inside the telescope

C) provided with stadia hairs in front of eye piece

D) fitted with a glass wedge in front of telescope

Correct Answer : fitted with a glass wedge in front of telescope

199 .

The method generally preferred to for contouring an undulating area, is

A) chain surveying

B) compass surveying

C) tacheometrical surveying

D) plane table surveying

Correct Answer : tacheometrical surveying

200 .

Geodetic surveying is undertaken

A) for production of accurate maps of wide areas

B) for developing the science of geodesy

C) making use of most accurate instruments and methods of observation

D) All of the above

Correct Answer : All of the above

Explanation : * for production of accurate maps of wide areas
* for developing the science of geodesy
* making use of most accurate instruments and methods of observation
* for determination of accurate positions on the earth's surface of system of control points

201 .

The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be

A) 3.44 m

B) 13.75 m

C) 1375 m

D) None of the above

Correct Answer : 13.75 m

202 .

An angle of deflection right, may be directly obtained by setting the instrument to read_______.

A) zero on back station

B) 90°

C) 180° on back station

D) 270° on back station

Correct Answer : zero on back station

203 .

The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is_______.

A) flying levelling

B) precise levelling

C) reciprocal levelling

D) differential levelling

Correct Answer : reciprocal levelling

204 .

Diopter is the power of a lens having a focal length of_____

A) 25 cm

B) 50 cm

C) 75 cm

D) 100 cm

Correct Answer : 100 cm

205 .

A well conditioned triangle has no angle less than_______.

A) 60°

B) 45°

C) 30°

D) 20°

Correct Answer : 30°

206 .

Contour lines of different elevations can unite to form one line, only in the case of______.

A) a saddle

B) a vertical cliff

C) a hill top

D) a water shed line

Correct Answer : a vertical cliff

207 .

Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling

A) resection

B) radiation

C) traversing

D) intersection

Correct Answer : resection

208 .

A clinometer is used for______.

A) measuring angle of slope

B) setting out right angles

C) defining natural features

D) correcting line of collimation

Correct Answer : measuring angle of slope

209 .

An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called

A) level line

B) contour line

C) line of gentle scope

D) contour gradient

Correct Answer : contour gradient

210 .

An angles of 45° with a chain line may be set out with

A) optical square

B) open cross staff

C) Fench cross staff

D) prismatic square

Correct Answer : Fench cross staff

211 .

Pick up the correct statement from the following :

A) spherical aberration may be reduced by diminishing the aperture

B) in telescope objectives, a combination of convex lens and concave lens is used

C) in eyepieces, two plano-convex lenses placed at a certain distance apart are used

D) All of the above

Correct Answer : All of the above

Explanation : * spherical aberration may be reduced by diminishing the aperture.
* spherical aberration may be minimised by replacing the single lens by a combination of the lenses.
* in telescope objectives, a combination of convex lens and concave lens is used.
* in eyepieces, two plano-convex lenses placed at a certain distance apart are used.

212 .

The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as______.

A) line of sight

B) line of collimation

C) axis of the telescope

D) None of the above

Correct Answer : line of collimation

213 .

The rise and fall method of reduction of levels, provides a check on

A) back sights

B) fore sights

C) intermediate sights

D) All of the above

Correct Answer : All of the above

214 .

If the declination of the needle is 10° W_______.

A) each of the whole circle reckoning has to be micros by 10°

B) in the quadrantal method, the corrections is negative in 2nd and 4th quadrants

C) in the quadrantal method, the correction is positive in the 1st and 3rd quadrants

D) All of the above

Correct Answer : All of the above

215 .

For taking offsets with an optical square on the right hand side of the chain line, it is held

A) by left hand upright

B) by right hand upright

C) by right hand upside down

D) by left hand up side down

Correct Answer : by left hand upright

216 .

If the whole circle bearing of a line is 270°, its reduced bearing is______.

A) N 90° W

B) 90° W

C) W 90°

D) S 90° W

Correct Answer : W 90°

217 .

Tilt of the staff in stadia tacheometry increases the intercept if it is_________.

A) towards the telescope pointing up-hill

B) away from the telescope pointing up-hill

C) away from the telescope pointing down hill

D) None of the above

Correct Answer : away from the telescope pointing up-hill

218 .

A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is

A) 0.04 m inclined upward

B) 0.04 m inclined downwards

C) 0.02 m inclined upwards

D) None of the above

Correct Answer : 0.04 m inclined downwards

219 .

The horizontal angle between true meridian and magnetic meridian, is known_____.

A) dip

B) bearing

C) convergence

D) magnetic declination

Correct Answer : magnetic declination

220 .

An imaginary line joining the points of equal elevation on the surface of the earth, represents____.

A) contour line

B) level line

C) contour surface

D) contour gradient

Correct Answer : contour line

221 .

The 'fix' of a plane table station with three known points, is bad if the plane table station lies

A) in the great triangle

B) outside the great triangle

C) on the circumference of the circumscribing circle

D) None of the above

Correct Answer : on the circumference of the circumscribing circle

222 .

If R is the radius of the main curve, θ the angle of deflection, S the shift and L the length of the transition curve, then, total tangent length of the curve, is______.

A) (R + S) tan θ/2 + L/2

B) (R + S) tan θ/2 - L/2

C) (R - S) tan θ/2 - L/2

D) (R - S) tan θ/2 + L/2

Correct Answer : (R + S) tan θ/2 + L/2

223 .

One of the Lehmann's rules of plane tabling, is________.

A) location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances

B) when looking in the direction of each of the given points, the instrument station will be on the right side of one and left side of the other ray

C) when the instrument station is outside the circumscribing circle its location is always on the opposite side of the ray to the most distant point as the inter-section of the other two rays

D) None of the above

Correct Answer : location of the instrument station is always distant from each of the three rays from the known points in proportion to their distances

224 .

The accuracy of measurement in chain surveying, does not depend upon________.

A) scale of the plotting

B) length of the offset

C) importance of the features

D) general layout of the chain lines

Correct Answer : general layout of the chain lines

225 .

Closed contours of decreasing values towards their centre, represent_____.

A) a hill

B) a depression

C) a river bed

D) a saddle or pass

Correct Answer : a depression

226 .

The line of sight is kept as high above ground surface as possible to minimise the error in the observed angles due to_______.

A) shimmering

B) vertical refraction

C) horizontal refraction

D) both shimmering and horizontal refraction

Correct Answer : both shimmering and horizontal refraction

227 .

The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as______.

A) a base

B) traverse leg

C) traverse base

D) All of the above

Correct Answer : traverse base

228 .

For locating a distant object visible from two transit stations, the method usually preferred to, is_______.

A) Angles from two transit stations

B) distance from two transit stations

C) Angles and distances from transit stations

D) Angle from one transit station and distance from the other

Correct Answer : Angles from two transit stations

229 .

Tacheometric formula for horizontal distances using horizontal sights can also suitable be employed for inclined sights through θ by multiplying

A) the constants by cos θ

B) the constants by sin² θ

C) the constants by cos² θ

D) the multiplying constant by cos² θ and additive constant by cos θ.

Correct Answer : the multiplying constant by cos² θ and additive constant by cos θ.

230 .

Diurnal variation of magnetic declination is______.

A) less in summer than in winter

B) less at equator than nearer the poles

C) greater at equator than nearer the poles

D) same at all latitudes and during different months

Correct Answer : less at equator than nearer the poles

231 .

The construction of optical square is based, on the principle of optical_______.

A) refraction

B) reflection

C) double reflection

D) double refraction

Correct Answer : double reflection

232 .

If the smallest division of a vernier is longer than the smallest division of its primary scale, the vernier is known as

A) double vernier

B) direct vernier

C) simple vernier

D) retrograde vernier

Correct Answer : retrograde vernier

233 .

The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as_______.

A) telescopic alidade

B) clinometer

C) tacheometer

D) Plane alidade

Correct Answer : telescopic alidade

234 .

The staff intercept will be_______.

A) smaller, nearer the staff is held

B) same, wherever the staff is held

C) greater farther off the staff is held

D) smaller, farther off the staff is held

Correct Answer : smaller, farther off the staff is held

235 .

Horizontal distances obtained tacheometerically are corrected for

A) slope correction

B) temperature correction

C) refraction and curvature correction

D) All of the above

Correct Answer : refraction and curvature correction

236 .

To orient a plane table at a point with two inaccessible points, the method generally adopted, is

A) radiation

B) two point problem

C) resection

D) intersection

Correct Answer : two point problem.

237 .

The combined effect of curvature and refraction over a distance L kilometres is

A) 67.2 L² mm

B) 64.5 L² mm

C) 76.3 L² mm

D) None of the above

Correct Answer : 67.2 L² mm

238 .

The angle between two plane mirrors of optical square, is________.

A) 30°

B) 45°

C) 60°

D) 90°

Correct Answer : 45°

239 .

The latitude of a traverse leg is obtained by multiplying its length by_______.

A) sign of its reduced bearing

B) tangent of its reduced bearing

C) cosecant of its reduced bearing

D) cosine of its reduced bearing

Correct Answer : cosine of its reduced bearing

240 .

The apparent error on reversal is_________.

A) thrice the actual error

B) equal to the actual error

C) twice the actual error

D) None of the above

Correct Answer : twice the actual error

241 .

Magnetic declination at any place__________.

A) changes abruptly

B) fluctuates

C) remains constant

D) does not remain constant

Correct Answer : does not remain constant

242 .

If L is in kilometres, the curvature correction is______.

A) 78.4 L² mm

B) 74.8 L² mm

C) 64.8 L² mm

D) 58.2 L² mm

Correct Answer : 78.4 L² mm

243 .

The total change in level along the line is equal to total back sights________.

A) minus total fore sights

B) the total rises minus total falls

C) the reduced level of last point minus reduced level of the first point

D) All of the above

Correct Answer : All of the above

244 .

The radius of curvature of the arc of the bubble tube is generally kept

A) 50 m

B) 100 m

C) 25 m

D) 10 m

Correct Answer : 100 m

245 .

If S is the length of a subchord and R is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to_______.

A) 573 R/S

B) 171.9 S/R

C) 1718.9 S/R

D) 1718.9 R/S

Correct Answer : 1718.9 S/R

246 .

The real image of an object formed by the objective, must lie______.

A) in the plane of cross hairs

B) at the centre of the telescope

C) anywhere inside the telescope

D) at the optical centre of the eye-piece

Correct Answer : in the plane of cross hairs

247 .

In chain surveying tie lines are primarily provided______.

A) to take offsets for detail survey

B) to check the accuracy of the survey

C) to avoid long offsets from chain lines

D) to increase the number of chain lines

Correct Answer : to avoid long offsets from chain lines

248 .

Hydrographic surveys deal with the mapping of________.

A) canal system

B) large water bodies

C) heavenly bodies

D) mountaineous region

Correct Answer : large water bodies

249 .

An ideal vertical curve to join two gradients, is_____.

A) circular

B) elliptical

C) hyperbolic

D) parabolic

Correct Answer : parabolic

250 .

The intercept of a staff________

A) increases if the staff is tilted towards normal

B) decreases if the staff is tilted away from normal

C) is maximum if the staff is held truly normal to the line of sight.

D) is minimum if the staff is held truly normal to the line of sight.

Correct Answer : is minimum if the staff is held truly normal to the line of sight.

251 .

Number of subdivisions per metre length of a levelling staff is______.

A) 200

B) 500

C) 1000

D) 2000

Correct Answer : 200

252 .

Prolongation of chain line across an obstruction in chain surveying, is done by_________.

A) solution of triangles

B) making angular measurements

C) drawing perpendiculars with a chain

D) All of the above

Correct Answer : drawing perpendiculars with a chain

253 .

Check lines (or proof lines) in Chain Surveying, are essentially required________.

A) to plot the offsets

B) to indicate the accuracy of the survey work

C) to plot the chain lines

D) to increase the out-turn

Correct Answer : to indicate the accuracy of the survey work

254 .

Cross-staff is used for_________.

A) taking levels

B) setting out right angles

C) measuring distances

D) measuring contour gradient

Correct Answer : setting out right angles

255 .

The 'point of curve' of a simple circular curve, is__________.

A) point of intersection

B) point of tangency

C) mid-point of the curve

D) point of commencement

Correct Answer : point of commencement

256 .

The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is_____.

A) 20 mm

B) 15 mm

C) 10 mm

D) 5 mm

Correct Answer : 20 mm

257 .

Ramsden eye-piece consists of________.

A) two convex lenses short distance apart

B) two concave lenses short distance apart

C) one convex lens and one concave lens short distance apart

D) two plano-convex lenses short distance apart, with the convex surfaces facing each other.

Correct Answer : two plano-convex lenses short distance apart, with the convex surfaces facing each other.

258 .

The distance between steps for measuring down hill to obtain better accuracy

A) decreases with increase of slope

B) decreases with decrease of slope

C) increases with increase of slope

D) decreases with decrease of weight of the chain.

Correct Answer : decreases with increase of slope

259 .

If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is_____.

A) 60°

B) 90°

C) 120°

D) 360°

Correct Answer : 120°

260 .

In setting up a plane table at any station

A) centering is done first

B) levelling is done first

C) both levelling and centering are done simultaneously

D) orientation is done first

Correct Answer : both levelling and centering are done simultaneously

261 .

Number of links per metre length of a chain are

A) 2

B) 5

C) 10

D) 20

Correct Answer : 5

262 .

For a curve of radius 100 m and normal chord 10 m, the Rankine's deflection angle, is_______.

A) 0°35'.95

B) 1°25'.53

C) 1°35'.95

D) 2°51'.53

Correct Answer : 2°51'.53

263 .

A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to________.

A) cumulative, + 0.11 m

B) cumulative, - 0.11 m

C) compensating, ± 0.11 m

D) None of the above

Correct Answer : cumulative, + 0.11 m

264 .

ABCD is a rectangular plot of land. If the bearing of the side AB is 75°, the bearing of DC is

A) 75°

B) 105°

C) 255°

D) 285°

Correct Answer : 75°

265 .

While measuring the distance between two points along upgrade with the help of a 20 m chain, the forward end of the chain is shifted forward through a distance_____.

A) 20 (cos θ - 1)

B) 20 (sin θ - 1)

C) 20 (sec θ - 1)

D) 20 (cosec θ - 1)

Correct Answer : 20 (sec θ - 1)

266 .

Subtense tacheometry is generally preferred to if ground is______.

A) flat

B) undulating

C) deserts

D) mountaineous

Correct Answer : undulating

267 .

For high sensivity of the bubble tube_______.

A) a liquid of low viscosity is used

B) the bubble space should be long

C) a liquid of low surface tension is used

D) All of the above

Correct Answer : All of the above

Explanation : * a liquid of low viscosity is used
* a liquid of low surface tension is used
* the bubble space should be long
* the bubble tube should not be too narrow

268 .

If a tacheometer is fitted with an anal-latic lens______.

A) additive constant is 100, multiplying constant is zero

B) multiplying constant is 100, additive constant is zero

C) both multiplying and additive constants are 50

D) both multiplying and additive constants are 100

Correct Answer : multiplying constant is 100, additive constant is zero

269 .

Volume of the earth work may be calculated by________.

A) end areas

B) mean areas

C) Prismoidal formula

D) All of the above

Correct Answer : All of the above

270 .

Ranging is an operation of______.

A) reconnaissance

B) judging the distance

C) determination of slope

D) establishing intermediate points between terminals.

Correct Answer : establishing intermediate points between terminals.

271 .

Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known

A) geodetic surveys

B) plane surveys

C) geographical surveys

D) topographical surveys

Correct Answer : geodetic surveys

272 .

An ideal transition curve is

A) true spiral

B) cubic spiral

C) cubic parabola

D) clothoid spiral

Correct Answer : clothoid spiral

Explanation : IRC recommends Spiral or clothoid as the ideal transition curve due to following reasons:

1. It satisfies that rate of change of centrifugal acceleration is constant i.e., Ls.R = constant. Where Ls = length of transition curve R = radius of curve.

2. The calculation and field implementation of spiral curve is simple and easy.

3. It enhances aesthetics also.

273 .

If the angular measurements of a traverse are more precise than its linear measurements, balancing of the traverse, is done by_______.

A) Empirical rule

B) Transit rule

C) Bowditch's rule

D) All of the above

Correct Answer : Transit rule

274 .

The branch of surveying in which both horizontal and vertical positions of a point, are determined by making instrumental observations, is known

A) telemetry

B) tachemetry

C) tacheometry

D) All of the above

Correct Answer : All of the above

275 .

Total latitude of a point is positive if it lies_______.

A) east of the reference parallel

B) west of the reference parallel

C) north of the reference parallel

D) south of the reference parallel

Correct Answer : north of the reference parallel

276 .

The reduced bearing of a line is N 87° W. Its whole circle bearing is______.

A) 273°

B) 93°

C) 87°

D) 3°

Correct Answer : 273°

277 .

The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known______.

A) orientation

B) setting

C) centering

D) levelling

Correct Answer : orientation

278 .

The orthographical projection of a traverse leg upon the reference meridian, is known as____.

A) bearing of the leg

B) latitude to the leg

C) departure of leg

D) co-ordinate of the leg

Correct Answer : latitude to the leg

279 .

The whole circle bearing of a line is 290°. Its reduced bearing is_____.

A) N 20° W

B) N 20° E

C) S 70° E

D) N 70° W

Correct Answer : N 70° W

280 .

Whole circle bearing of a line is preferred to a quadrantal bearing merely because

A) bearing is not completely specified by an angle

B) its trigonometrical values may be extracted from ordinary tables easily

C) bearing is completely specified by an angle

D) Sign of the correction of magnetic declination is different in different quadrants

Correct Answer : bearing is completely specified by an angle

281 .

Pantagraph is used for_____.

A) measuring areas

B) measuring distances

C) setting out right angles

D) enlarging or reducing plans

Correct Answer : enlarging or reducing plans

282 .

Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are known as

A) city surveys

B) topographical surveys

C) guide map surveys

D) cadastral surveys

Correct Answer : topographical surveys

283 .

Which of the following introduces an error of about 1 in 1000 if 20 m chain is used

A) length of chain 20 mm wrong

B) one end of the chain 0.9 m off the line

C) one end of chain 0.9 m higher than the other

D) All of the above

Correct Answer : All of the above

Explanation : * length of chain 20 mm wrong
* one end of the chain 0.9 m off the line
* one end of chain 0.9 m higher than the other
* middle of the chain 0.45 m off the line

284 .

Chain surveying is well adopted for_______.

A) small areas in open ground

B) large areas with simple details

C) small areas with crowded details

D) large areas with difficult details

Correct Answer : small areas in open ground

285 .

The Huygen's telescope eye piece________.

A) achromatic

B) is aplanatic

C) Both (A) and (B)

D) Neither (A) nor (B)

Correct Answer : Both (A) and (B)

286 .

In a closed traverse, sum of south latitudes exceeds the sum of north latitudes and the sum of east departures exceeds the sum of west departures, then, the closing line will lie in

A) north east quadrant

B) north-west quadrant

C) south-west quadrant

D) south-east quadrant

Correct Answer : north-west quadrant

287 .

A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is_______.

A) 202.75 m

B) 206.75 m

C) 208.75 m

D) 211.75 m

Correct Answer : 206.75 m

Civil Engineering : Surveying MCQs with Answers