Civil Engineering Steel Structure Design Quiz (or) MCQ

1 .

A) Branch of mechanical engineering that deals with the structural steel design

B) Branch of industrial engineering that deals with the design of steel structures

C) Branch of structural engineering that deals with the design of steel structures

D) None of the above

Correct Answer : Branch of structural engineering that deals with the design of steel structures

Explanation : Steel design, or structural steel design, is a branch of structural engineering that deals with the design of steel structures. A steel structure is made up of structural members made of steel that have standard cross-sectional profiles, chemical compositions, and mechanical qualities.

2 .

Which of the following method is best for the design of steel structure?

A) Limit State Method

B) Ultimate Load Method

C) Working Stress Method

D) Earthquake Load Method

Correct Answer : Limit State Method

Explanation : The limit state method is commonly used to design steel buildings and their components. When the limit state method isn’t feasible, the working stress method can be employed.

3 .

Diameter of a rivet hole is made larger than the diameter of the rivet by

A) 1.0 mm for rivet diameter upto 12 mm

B) 1.5 mm for rivet diameter exceeding 25 mm

C) 2.0 mm for rivet diameter over 25 mm

D) None of the above

Correct Answer : 2.0 mm for rivet diameter over 25 mm

4 .

Number of rivets required in a joint, is

A) load / tearing strength of a rivet

B) load / rivet value

C) load / bearing strength of a rivet

D) load /shear strength of a rivet

Correct Answer : load / rivet value

5 .

For a column of height L fixed in position and direction both at its top and bottom, its effective length, is

A) L

B) 2L

C) 1/√2

D) (1/2)*L

Correct Answer : (1/2)*L

6 .

If the slenderness ratio is greater than 160, the allowable stress in axial compression is multiplied by a factor (1.2 - (l/xy) where x is

A) 800

B) 600

C) 400

D) 200

Correct Answer : 800

7 .

The effective length of a compression member of length L, held in position and restrained in direction at both ends, is

A) 2 L

B) 1.5 L

C) 0.85 L

D) 0.67 L

Correct Answer : 0.67 L

8 .

Spans of continuous fillers are considered approximately equal if the longest span does not exceed the shortest span by more than

A) 5%

B) 10%

C) 15%

D) 20%

Correct Answer : 15%

9 .

Cold driven rivets range from_____.

A) 22 to 32 mm in diameter

B) 12 to 22 mm in diameter

C) 10 to 16 mm in diameter

D) 6 to 10 mm in diameter

Correct Answer : 12 to 22 mm in diameter

10 .

The main type of butt joints, is a double cover

A) chain riveted joint

B) shear riveted joint

C) zig-zag riveted joint

D) All of the above

Correct Answer : All of the above

11 .

In a grillage footing, the maximum shear force occurs at the

A) edge of base plate

B) centre of base plate

C) edge of grillage beam

D) centre of grillage beam

Correct Answer : edge of base plate

12 .

Modified moment of inertia of sections with a single web, is equal to moment of inertia of the section about Y-Y axis at the point of maximum bending moment and is multiplied by the ratio of

A) area of tension flange at the minimum bending moment of the corresponding area at the point of maximum bending moment

A)

B) total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment

B)

C) area of compression flange at the minimum bending moment to the corresponding area at the point of maximum bending moment

C)

D) None of the above

D)

Correct Answer : total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment

13 .

According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as

A) 0.000008

B) 0.000010

C) 0.000012

D) 0.000014

Correct Answer : 0.000012

14 .

For a cantilever beam of length L continuous at the support and unrestrained against torsion at the support and free at the end, the effective length l is equal to

A) l = 3.5L

B) l = 3L

C) l = 2L

D) l = 0.5L

Correct Answer : l = 3L

15 .

Which of the following is a type of steel structure design?

A) Simple design

B) Continuous design

C) Semi-continuous steel design

D) All of the above

Correct Answer : Continuous design

Explanation : There are three different methods for the design of steel structures :

* simple design
* continuous design
* semi-continuous steel design

16 .

Which of the following is added to steel to increase resistance to corrosion?

A) Carbon

B) Sulphur

C) Manganese

D) Copper

Correct Answer : Copper

Explanation : Addition of small quantity of copper increases resistance to corrosion. Even Chrome and Nickel are added to impart corrosion resistance property to steel.

17 .

When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from

A) each web

B) each flange

C) each web or one hole from each flange whichever is less

D) each web or one hole from each flange whichever is more

Correct Answer : each web or one hole from each flange whichever is less

18 .

If d is the distance between the flange angles, the vertical stiffeners in plate girders without horizontal stiffeners, are spaced at a distance not less than

A) 0.44 d

B) 0.33 d

C) 0.22 d

D) 0.15 d

Correct Answer : 0.33 d

19 .

A column splice is used to increase

A) length of the column

B) strength of the column

C) cross-sectional area of the column

D) None of the above

Correct Answer : length of the column

20 .

If W and L are the total superimposed load and the span of a plate girder in metres, the approximate self weight (W) of the girder, is taken as

A) M = WL/100

B) M = WL/200

C) M = WL/300

D) M = WL/400

Correct Answer : M = WL/300

21 .

Net sectional area of a tension member, is equal to its gross section area

A) minus the area of the rivet holes

B) plus the area of the rivet holes

C) divided by the area of rivet holes

D) multiplied by the area of the rivet holes

Correct Answer : minus the area of the rivet holes

22 .

The distance measured along one rivet line from the centre of a rivet to the centre of adjoining rivet on an adjacent parallel rivet line, is called

A) pitch of rivet

B) staggered pitch

C) gauge distance of rivet

D) All of the above

Correct Answer : staggered pitch

23 .

Tongue plates are provided in a steel girder at

A) the upper flange

B) the lower flange

C) the upper end of the web

D) the upper and lower ends of the web

Correct Answer : the upper and lower ends of the web

24 .

The permissible stress in bending for rolled steel I-beams and channels, is

A) 1500 kg/cm²

B) 1575 kg/cm²

C) 1650 kg/cm²

D) 1875 kg/cm²

Correct Answer : 1650 kg/cm²

25 .

The gross diameter of a rivet is the diameter of

A) rivet hole

B) cold rivet before driving

C) rivet after driving

D) None of the above

Correct Answer : rivet after driving

26 .

The ratio of the span L of the filler joists to the depth d from the under side of the joist to the top of the structural concrete, should not exceed

A) 45

B) 35

C) 25

D) 20

Correct Answer : 35

27 .

Perforated cover plates are particularly suitable for built up sections consisting of

A) four angle box section

B) channels placed toe to toe

C) channels placed back to back

D) All of the above

Correct Answer : four angle box section

28 .

The tensile strength of mild steel for bolts and nuts should not be less than

A) 32 kg/mm²

B) 36 kg/mm²

C) 40 kg/mm²

D) 44 kg/mm²

Correct Answer : 44 kg/mm²

29 .

Column footing is provided

A) to spread the column load over a larger area

B) to distribute the column load over soil through the column footing

C) to ensure that intensity of bearing pressure between the column footing and soil does not exceed permissible bearing capacity of the soil

D) All of the above

Correct Answer : All of the above

30 .

A 20 mm dia steel bar which is subjected to an axial tension of 2300 kg/cm2 produces a strain of 0.004 cm. If Young's modulus of steel is 2.1 x 106 kg/cm², the bar is

A) at yield point

A)

B) in the plastic range

B)

C) in the elastic range

C)

D) All of the above

D)

Correct Answer : in the elastic range

31 .

Poisson's ratio for steel within elastic limit, ranges from

A) 0.33 to 0.35

B) 0.25 to 0.33

C) 0.25 to 0.24

D) 0.15 to 0.20

Correct Answer : 0.25 to 0.33

32 .

When a large value of radius of gyration is not required

A) channel flanges are kept inward

B) channels are placed back to back

C) channel flanges are kept outward

D) None of the above

Correct Answer : channel flanges are kept inward

33 .

The maximum axial load which is just sufficient to keep a column in a small deflected shape, is called

A) critical load

B) buckling load

C) crippling load

D) All of the above

Correct Answer : All of the above

34 .

The rivets which are heated and then driven in the field, are known

A) cold driven rivets

B) hand driven rivets

C) power driven field rivets

D) power driven shop rivets

Correct Answer : power driven field rivets

35 .

The strength of a riveted lap joint is equal to its

A) shearing strength

B) bearing strength

C) tearing strength

D) least of (a), (b) and (c)

Correct Answer : least of (a), (b) and (c)

36 .

Outstanding length of a compression member consisting of a channel, is measured as

A) half of the nominal width

B) nominal width of the section

C) from the edge to the first row of rivets

D) None of the above

Correct Answer : nominal width of the section

37 .

The equivalent axial load may be defined as the load which produces a stress equal to

A) bending stress

B) maximum stress produced by the eccentric load

C) maximum stressed fibre

D) None of the above

Correct Answer : maximum stress produced by the eccentric load

38 .

If d is the distance between the flange angles of a plate girder, vertical stiffeners are provided at a distance not greater than

A) 1.5 d but not less than 0.33 d

B) 1.25 d but not less than 0.33 d

C) 2.0 d but not less than 0.50 d

D) 2.5 d but not less than 0.50 d

Correct Answer : 1.5 d but not less than 0.33 d

39 .

The beam outside a wall upto floor level above it, is known as

A) rafter

B) purlin

C) lintel

D) spandrel beam

Correct Answer : spandrel beam

40 .

A structural member subjected to tensile force in a direction parallel to its logitudinal axis, is generally known as

A) a tie

B) a tie member

C) a tension member

D) All of the above

Correct Answer : All of the above

41 .

For the economical design of a combined footing to support two equal column loads, the projections of beams in lower tier are kept such that bending moment under column is equal to

A) bending moment at the centre of the beam

A)

B) half the bending moment at the centre of the beam

B)

C) twice the bending moment at the centre of the beam

C)

D) None of the above

D)

Correct Answer : bending moment at the centre of the beam

42 .

On steel structures the dead load is the weight of

A) steel work

B) material supported permanently

C) material fastened to steel work

D) All of the above

Correct Answer : All of the above

43 .

The net area of round bars to resist the tension, is the area of cross section at

A) mid-section

B) root of the thread

C) Both (A) and (B)

D) None of the above

Correct Answer : root of the thread

44 .

The least permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to

A) 160 t

B) 170 t

C) 180 t

D) 200 t

Correct Answer : 180 t

45 .

Long column is one_____.

A) which is free at its top

B) which is more than 3 m long

C) whose lateral dimension is less than 25 cm

D) which has a ratio of effective length and least lateral dimension more than 15.

Correct Answer : which has a ratio of effective length and least lateral dimension more than 15.

46 .

Which of the following is a disadvantage of Steel?

A) Reusable

B) High durability

C) Fire and corrosion resistance

D) High strength per unit mass

Correct Answer : Fire and corrosion resistance

Explanation : Steel has high strength per unit mass, highly durable, and is reusable. But steel is poor in fire and corrosion resistance, it needs to be protected.

47 .

Which of the following is the property of high carbon steel?

A) high strength

B) reduced ductility

C) high toughness

D) reduced strength

Correct Answer : reduced ductility

Explanation : High carbon steel contains high carbon content. Hence it has reduced ductility, toughness and weldability.

48 .

What is the minimum percentage of chromium and nickel added to stainless steel?

A) 2%, 20%

B) 30%, 50%

C) 0.5%, 10.5%

D) 10.5%, 0.5%

Correct Answer : 10.5%, 0.5%

Explanation : Stainless steel are low carbon steels to which a minimum of 10.5% chromium (maximum 20%) and 0.5% nickel is added.

49 .

High carbon steel is used in ___________

A) transmission lines and microwave towers

B) for waterproofing

C) structural buildings

D) fire resistant buildings

Correct Answer : transmission lines and microwave towers

Explanation : High carbon steel is used in transmission lines and microwave towers where relatively light members are joint by bolting.

50 .

A riveted joint may experience_________.

A) shear failure

B) shear failure of plates

C) bearing failure

D) All of the above

Correct Answer : All of the above

Explanation : * shear failure
* shear failure of plates
* bearing failure
* bearing failure of rivets

51 .

With a percentage increase of carbon in steel, decreases its

A) hardness

B) ductility

C) strength

D) brittleness

Correct Answer : ductility

52 .

In double lacing, the thickness t of flat lacing is

A) t < 1/40 th length between inner end rivets

A)

B) t < 1/50 th length between inner end rivets

B)

C) t < 1/60 th length between inner end rivets

C)

D) t < 1/70 th length between inner end rivets

D)

Correct Answer : t < 1/60 th length between inner end rivets

53 .

When the length of a tension member is too long

A) a rod is used

B) a wire rope is used

C) a bar is used

D) a single angle is used

Correct Answer : a bar is used

54 .

Pick up the correct statement from the following :

A) When the gauge distance is larger than the pitch, the failure of the section may occur in a zig-zag line

A)

B) When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holes increases

B)

C) When the gauge distance is smaller than the pitch, the failure of the section may occur in a straight right angle section through the centre of rivet holes

C)

D) All of the above

D)

Correct Answer : All of the above

55 .

The ratio of longitudinal stress to strain within eiastic limit, is known as

A) modulus of elasticity

B) bulk modulus of elasticity

C) shear modulus of elasticity

D) tangent modulus of elasticity

Correct Answer : modulus of elasticity

56 .

Secant formula for direct stress in compression, is applicable only for slenderness ratio upto

A) 130

B) 150

C) 140

D) 130

Correct Answer : 140

57 .

A second horizontal stiffener is always placed at the neutral axis of the girder if the thickness of the web is less than

A) d/250 for structural steel

B) d/225 for high tensile steel

C) Both (A) and (B)

D) None of the above

Correct Answer : Both (A) and (B)

58 .

The rolled steel I-sections are most commonly used as beams because these provide

A) greater lateral stability

B) large moment of inertia with less cross-sectional area

C) large moment of resistance as compared to other section

D) All of the above

Correct Answer : All of the above

59 .

The thickness t of a single flat lacing should not be less than

A) 1/30 th length between inner end rivets

B) 1/40 th length between inner end rivets

C) 1/50 th length between inner end rivets

D) 1/60 th length between inner end rivets

Correct Answer : 1/40 th length between inner end rivets

60 .

For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than (excepting the webs of Indian Standard rolled steel joists and channels).

A) 4 mm

A)

B) 6 mm

B)

C) 8 mm

C)

D) 10 mm

D)

Correct Answer : 6 mm

61 .

The average shear stress for rolled steel beam section, is

A) 945 kg/cm²

B) 1025 kg/cm²

C) 1500 kg/cm²

D) 1760 kg/cm²

Correct Answer : 945 kg/cm²

62 .

For a rectangular section, the ratio of the maximum and average shear stresses, is

A) 1.5

B) 2.0

C) 2.5

D) 3.0

Correct Answer : 1.5

63 .

The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate).

A) 8 t

B) 6 t

C) 4 t

D) 2 t

Correct Answer : 4 t

64 .

Pick up the correct statement from the following :

A) Dead loads are known in the beginning of the design

A)

B) Dead loads change their positions and vary in magnitude

B)

C) Dead load includes self-weight of the structure and super-imposed loads permanently attached to the structure

C)

D) None of the above

D)

Correct Answer : Dead load includes self-weight of the structure and super-imposed loads permanently attached to the structure

65 .

The slenderness ratio of a column is zero when its length

A) is zero

B) is equal to its radius of gyration

C) is between the points of zero moments

D) is supported on all sides throughout its length

Correct Answer : is supported on all sides throughout its length

66 .

If f is the maximum allowable bending stress in a tension member whose radius of gyration is r and depth is 2y, the required cross sectional area A is given by

A) A = My/fr

B) A = My/fr²

C) A = My²/fr²

D) A = My/f²r²

Correct Answer : A = My/fr²

67 .

The main advantage of a steel member, is :

A) its high strength

B) its long service life

C) its gas and water tightness

D) All of the above

Correct Answer : All of the above

68 .

The beams supporting the steps of a stair are generally known as

A) stringers

B) headers

C) trimmers

D) spandrel beams

Correct Answer : stringers

69 .

In a grillage column footing maximum bending moment M occurs at the centre of grillage beams. Its value is (where P, L and a are axial load, length of the beam and length of the column base respectively).

A) M = P(L-a)

A)

B) M = P/4(L+a)

B)

C) M = P/8(L-a)

C)

D) M = P/8(L+a)

D)

Correct Answer : M = P/8(L-a)

70 .

For a steel grillage footing to support two unequal column loads

A) trapezoidal shape is used for the base footing

B) projections of beams on either side in lower tier are such that bending moments under columns are equal

C) bending moment under the columns are kept equal to the bending moment between to two columns

D) All of the above

Correct Answer : All of the above

Explanation : * trapezoidal shape is used for the base footing
* projections of beams on either side in lower tier are such that bending moments under columns are equal
* bending moment under the columns are kept equal to the bending moment between to two columns
* line of action of the resultant of two column loads, is made to coincide with the centre of gravity of the base of the footing

71 .

In case of cantilever fillers, the ratio of the span L to depth d, should not exceed

A) 4

B) 8

C) 12

D) 16

Correct Answer : 12

72 .

The most commonly used sections in lateral system to carry shear force in built up columns, are

A) rolled angles

B) rolled channels

C) rolled steel flats

D) All of the above

Correct Answer : All of the above

73 .

If p and d are pitch and gross diameter of rivets, the efficiency (η) of the riveted joint, is given by

A) η = p/p-d

B) η = p-d/p

C) η = p+d/p

D) η = p-d/p

Correct Answer : η = d/d+p

74 .

For steel members not exposed to weather, the thickness of steel should not be less than

A) 6 mm

B) 8 mm

C) 10 mm

D) 12 mm

Correct Answer : 6 mm

75 .

The minimum pitch of rivet holes of diameter d should not be less than

A) 1.25 d

B) 1.5 d

C) 2 d

D) 2.5 d

Correct Answer : 2.5 d

76 .

According to IS : 800-1962 the permissible bending stress in steel slab plates, is

A) 1420 kg/cm²

B) 1500 kg/cm²

C) 1890 kg/cm²

D) 2125 kg/cm²

Correct Answer : 1890 kg/cm²

77 .

A simply supported beam carrying a central load, will be safe in deflection if the ratio of its span to depth, is

A) > 24

A)

B) < 24

B)

C) > 19

C)

D) < 19

D)

Correct Answer : < 24

78 .

For double angles carrying tension, placed back to back and connected to either side of the gusset plate, the sectional area of the section, is equal to cross sectional area of

A) the section

B) the section minus area of rivet holes

C) the section plus area of rivet holes

D) the section multiplied by the area of the rivet hole.

Correct Answer : the section minus area of rivet holes

79 .

The moment of the couple set up in a section of a beam by the logitudinal compressive and tensile force, is known as

A) moment of resistance

B) bending moment

C) flexural stress moment

D) None of the above

Correct Answer : moment of resistance

80 .

Pick up the correct statement from the following :

A) The minimum pitch should not be less than 12 times the gross diameter of the rivet

A)

B) The minimum pitch should not be less than 2.5 times the gross diameter of the river

B)

C) The maximum pitch should not exceed 10 times the thickness or 150 mm whichever is less in compression

C)

D) All of the above

D)

Correct Answer : The minimum pitch should not be less than 2.5 times the gross diameter of the river

81 .

A major beam in a building structure, is known as

A) a girder

B) a main beam

C) a floor beam

D) All of the above

Correct Answer : All of the above

82 .

Rolled steel Tee-sections are used

A) as columns

B) as built up sections to resist axial tension

C) with flat strips to connect plates in steel rectangular tanks

D) None of the above

Correct Answer : with flat strips to connect plates in steel rectangular tanks

83 .

In rolled steel beams, shear force is mostly resisted by____.

A) web only

B) flanges only

C) web and flanges together

D) None of the above

Correct Answer : web only

84 .

When plates are exposed to weather, tacking rivets are provided at a pitch in line not exceeding (where t is the thickness of the outside plate).

A) 8 t

B) 16 t

C) 24 t

D) 32 t

Correct Answer : 16 t

85 .

The greatest gauge of long rivets should not exceed (where d is the diameter of the holes).

A) 4 d

B) 6 d

C) 8 d

D) 10 d

Correct Answer : 8 d

86 .

Maximum permissible slenderness ratio of a member normally acting as a tie in a roof truss, is

A) 200

B) 250

C) 300

D) 350

Correct Answer : 350

87 .

If d is the distance between the flange angles,

A) vertical stiffeners are provided in steel plate girders if the web is less than d/85

B) vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175

C) horizontal stiffeners are provided in high tensile girder steel plate if the web is less than d/180

D) All of the above

Correct Answer : All of the above

Explanation : * vertical stiffeners are provided in steel plate girders if the web is less than d/85
* vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175
* horizontal stiffeners are provided in high tensile girder steel plate if the web is less than d/180
* horizontal stiffeners are provided in steel plate girders if the web is less than d/200

88 .

The effective length of a compression member of length L held in position at both ends but not restrained in direction, is

A) L

B) 0.67 L

C) 0.85 L

D) 1.5 L

Correct Answer : L

89 .

Tacking rivets in tension members, are provided at a pitch in line not exceeding

A) 25 cm

B) 75 cm

C) 100 cm

D) None of the above

Correct Answer : 100 cm

90 .

If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

A) D²T/ 250 x R/W

A)

B) D³T/250 x R/W

B)

C) DT/250 x R/W

C)

D) DT/250 x W/R

D)

Correct Answer : D³T/250 x R/W

91 .

A beam may be designed as a cased beam if

A) section is of double open channel form with the webs not less than 40 mm apart

B) beam is solidly encased in concrete with 10 mm aggregate having 28 days strength 160 kg/cm2

C) overall depth and width of the steel section do not exceed 750 and 450 mm respectively.

D) All of the above

Correct Answer : All of the above

Explanation : * section is of double open channel form with the webs not less than 40 mm apart
* overall depth and width of the steel section do not exceed 750 and 450 mm respectively.
* beam is solidly encased in concrete with 10 mm aggregate having 28 days strength 160 kg/cm2
* width of the solid casing is kept at least 100 mm more than the width of the steel flange and having a concrete cover of 50 mm

92 .

For a single section used as a tension member, the given area is assumed

A) 30% to 40% in excess of the net area

B) 40% to 50% in excess of the net area

C) 50% to 60% in excess of the net area

D) 60% to 70% in excess of the net area

Correct Answer : 40% to 50% in excess of the net area

93 .

The minimum width B of a solid casing for a cased beam, is equal to

A) B = b + 50 mm

B) B = b + 75 mm

C) B = b + 100 mm

D) B = b + 125 mm

Correct Answer : B = b + 100 mm

94 .

Design of a riveted joint is based on the assumption :

A) Stress in the plate in not uniform

B) Bending stress in rivets is accounted for

C) Friction between plates is taken into account

D) Riveted hole is assumed to be completely filled by the rivet

Correct Answer : Riveted hole is assumed to be completely filled by the rivet

95 .

What is the net section area of steel plate 40cm wide and 10mm thick with one bolt if diameter of bolt hole is 18mm?

A) 38.2 cm²

B) 24 cm²

C) 465 mm²

D) 578 mm²

Correct Answer : 38.2 cm²

Explanation : b = 40cm = 400mm, t = 10mm, d_h = 18mm
Net section area = 400×10 – 16×10 = 3820mm² = 38.2 cm²

96 .

Which of the following relation is correct?

A) Design Strength = Ultimate strength + Partial factor of safety

A)

B) Design Strength = Ultimate strength / Partial factor of safety

B)

C) Design Strength = Ultimate strength – Partial factor of safety

C)

D) Design Strength = Ultimate strength * Partial factor of safety

D)

Correct Answer : Design Strength = Ultimate strength / Partial factor of safety

Explaination : Design Strength = Ultimate strength / Partial factor of safety.

This partial safety factor accounts for possibility of unfavourable deviation of material strength from characteristic value, variation of member sizes, reduction in member strength due to fabrication and tolerances and uncertainty in calculation of strength of members.

97 .

Which of the following load is to be considered on liquid retaining structure?

A) hydrostatic load

B) dynamic load

C) earth pressure

D) wave and current load

Correct Answer : hydrostatic load

Explanation : Hydrostatic load is considered on liquid retaining structures or hydraulic structures. Wave and current load is considered in marine and offshore structure. Earth pressure is considered in basements, retaining walls, column footings, etc. Dynamic load is due to earthquakes and wind.

98 .

Which of the following factors does not influence earthquake resistance design?

A) site soil

B) wind of location

C) strength of structure

D) geographical location of structure

Correct Answer : wind of location

Explanation : The factors which influence earthquake resistance design are : (i) geographical location of structure, (ii) site soil and foundation condition, (iii) importance of structure, (iv) dynamic characteristics of structure such as strength, stiffness, ductility and energy dissipation factor.

99 .

Which of the following load combination is not possible?

A) Dead load + imposed load

B) Dead load + wind load + earthquake load

C) Dead load + imposed load + wind load

D) Dead load + imposed load + earthquake load

Correct Answer : Dead load + wind load + earthquake load

Explanation : According to IS code, it is assumed that maximum wind load and earthquake load will not occur simultaneously on a structure. The following combination of loads with appropriate partial safety factors may be considered :

(i)Dead load + imposed load
(ii) Dead load + imposed load + earthquake load or wind load
(iii) Dead load + wind load or earthquake load
(iv) Dead load + erection load.

100 .

An imaginary line along which rivets are placed, is known as

A) rivet line

B) gauge line

C) scrieve line

D) All of the above

Correct Answer : All of the above

101 .

The allowable stress in axial tension is generally kept less if thickness of the member is more than

A) 12 mm

B) 15 mm

C) 20 mm

D) 22 mm

Correct Answer : 20 mm

102 .

The maximum permissible slenderness ratio of compression member carrying dead and superimposed load, is

A) 180

B) 200

C) 250

D) 300

Correct Answer : 180

103 .

The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm² , is

A) 22 kg/cm²

A)

B) 20 kg/cm²

B)

C) 18 kg/cm²

C)

D) 16 kg/cm²

D)

Correct Answer : 20 kg/cm²

104 .

Lug angle is____.

A) used with channel member

B) used with single angle member

C) not used with double angle member

D) All of the above

Correct Answer : All of the above

105 .

Effective length of a column effectively held in position and restrained in direction at both ends, is

A) L

B) 0.67 L

C) 0.85 L

D) 1.5 L

Correct Answer : 0.67 L

106 .

A riveted joint many experience

A) tearing failure of plates

B) bearing failure of plates

C) splitting failure of plates at the edges

D) All of the above

Correct Answer : All of the above

107 .

IS : 800 - 1971 recommends that in a splice plate the number of rivets carrying calculated shear stress through a packing greater than 6 mm thick, is to be increased by 2.5% for every

A) 1.00 mm thickness of packing

A)

B) 1.50 mm thickness of packing

B)

C) 2.0 mm thickness of packing

C)

D) 2.50 mm thickness of packing

D)

Correct Answer : 2.0 mm thickness of packing

108 .

To keep the intensity of bearing pressure between the column base and concrete, compressive throughout the length of the column base, the ratio of the moment M to axial load P should be

A) < L/3

A)

B) < L/6

B)

C) > L/3

C)

D) > L/6

D)

Correct Answer : < L/6

109 .

When the upper column does not provide full bearing area over lower column, the column splice is provided with the following assumption

A) axial load is assumed to be taken by flanges

A)

B) bearing plate is assumed as a short beam to transmit the axial load to the lower column section

B)

C) load transmitted from the flanges of upper column and reactions from the flanges of lower columns are equal and form a couple

C)

D) All of the above

D)

Correct Answer : All of the above

110 .

For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm² if it is

A) HTW grade of thickness exceeding 32 mm

A)

B) HT grade of thickness exceeding 45 mm

B)

C) HT grade of thickness not exceeding 45 mm

C)

D) All of the above

D)

Correct Answer : All of the above

111 .

The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is

A) 180

B) 200

C) 250

D) 300

Correct Answer : 250

112 .

If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than

A) 1.75 d

B) 1.5 d

C) 1.25 d

D) 0.67 d

Correct Answer : 1.5 d

113 .

If the unsupported length of a stanchion is 4 metres and least radius of gyration of its cross-section is 5, the slenderness ratio of the stanchion, is

A) 80

B) 90

C) 100

D) 120

Correct Answer : 80

114 .

Web crippling generally occurs at the point where

A) concentrated loads act

B) deflection is maximum

C) bending moment is maximum

D) shearing force is minimum

Correct Answer : concentrated loads act

115 .

Pick up the incorrect statement from the following :

A) The gross diameter of a rivet is the diameter of rivet hole

A)

B) The nominal diameter of a rivet is its diameter before driving

B)

C) The gross area of a rivet is the cross-sectional area of the rivet hole

C)

D) The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

D)

Correct Answer : The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

116 .

The allowable stress in axial tension for rolled I-sections and channels, is taken as

A) 1420 kg/cm²

B) 1500 kg/cm²

C) 1810 kg/cm²

D) 2125 kg/cm²

Correct Answer : 1500 kg/cm²

117 .

When a tension member is made of four angles with a plate as a web, the allowance for holes is made as

A) one hole for each angle and one hole for the web

B) two holes for each angle and one hole for the web

C) one hole for each angle and two holes for the web

D) two holes for each angle and two holes for the web

Correct Answer : one hole for each angle and two holes for the web

118 .

The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than

A) 55

B) 60

C) 75

D) 82

Correct Answer : 82

119 .

The most economical section for a column, is

A) flat strip

B) hexagonal

C) solid round

D) tubular section

Correct Answer : tubular section

120 .

The distance between e.g. of compression and e.g. of tension flanges of a plate girder, is known as

A) effective depth

B) clear depth

C) overall depth

D) None of the above

Correct Answer : effective depth

121 .

A structural member subjected to compressive stress in a direction parallel to its longitudinal axis, is generally known as

A) post

B) strut

C) column

D) All of the above

Correct Answer : All of the above

122 .

In plastic analysis, the shape factor for circular sections, is

A) 1.5

B) 1.6

C) 1.697

D) None of the above

Correct Answer : 1.697

123 .

A beam is defined as a structural member subjected to

A) axial loading

B) transverse loading

C) axial and transverse loading

D) None of the above

Correct Answer : transverse loading

124 .

According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than

A) d/85

B) d/200

C) d/225

D) d/250

Correct Answer : d/250

125 .

A fillet weld may be termed as

A) mitre weld

B) convex weld

C) concave weld

D) All of the above

Correct Answer : All of the above

126 .

Strengths of a rivet in single shearing, in bearing and in tearing are 3425 kg, 4575 kg and 5025 kg respectively. If the load in the member is 35 tonnes, the number of rivets required, is

A) 12

A)

B) 13

B)

C) 15

C)

D) 17

D)

Correct Answer : 13

127 .

In a fillet weld placed on the sides of the base, the metal experiences

A) shear

B) bending

C) tension

D) compression

Correct Answer : All of the above

128 .

The bending moment for filler joists at the middle of at intermediate span, is

A) WL²/10

B) - WL²/10

C) WL²/12

D) - WL²/12

Correct Answer : WL²/12

129 .

The Indian standard code which deals with steel structures, is

A) IS : 456

B) IS : 800

C) IS : 875

D) IS : 1893

Correct Answer : IS : 800

130 .

When two plates are placed end to end and are joined by two cover plates, the joint is known as

A) double cover butt joint

B) butt joint

C) chain riveted lap joint

D) zig-zag riveted lap joint

Correct Answer : double cover butt joint

131 .

The effective length of a weld, is taken as the actual length

A) plus the size of weld

B) minus the size of weld

C) minus twice the size of weld

D) plus twice the size of weld

Correct Answer : minus twice the size of weld

132 .

The permissible bearing stress in steel, is

A) 1500 kg/cm²

B) 1890 kg/cm²

C) 2025 kg/cm²

D) 2250 kg/cm²

Correct Answer : 1890 kg/cm²

133 .

The main assumption of the method of simple design of steel frame work, is :

A) beams are simply supported

B) all connections of beams, girders and trusses are virtually flexible

C) members in compression are subjected to forces applied at appropriate eccentricities

D) All of the above

Correct Answer : All of the above

134 .

The side thrust T on the tie rods provided at the end beam of jack arch of rise R, is calculated from the formula

A) T = WL/8R

B) T = WR/8L

C) T = WL/4R

D) T = WL/2R

Correct Answer : T = WL/8R

135 .

When the depth of a plate girder is at least n times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if n is

A) 4

B) 6

C) 8

D) 10

Correct Answer : 8

136 .

Stiffeners are used in a plate girder

A) to reduce the shear stress

B) to avoid buckling of web plate

C) to take the bearing stress

D) to reduce the compressive stress

Correct Answer : to avoid buckling of web plate

137 .

The channels get twisted symmetrically with regard to its axis

A) parallel to web

B) parallel to flanges

C) perpendicular to web

D) perpendicular to flanges

Correct Answer : parallel to web

138 .

The stiff portion of a bearing stiffener is taken equal to

A) depth of the beam

B) 3/4 th depth of the beam

C) 1/ 2 depth of the beam

D) 3/4 depth of the beam

Correct Answer : 3/4 depth of the beam

139 .

Effective length of a column effectively held in position at both ends and restrained in direction at one end, is

A) L

B) 0.67 L

C) 0.85 L

D) 1.5 L

Correct Answer : 0.85 L

140 .

The strength of ISA 125 = 75 x 10 mm used as a tie member with its longer leg connected at the ends by 27 mm diameter rivets, is

A) 26,000 kg

B) 26,025 kg

C) 26,050 kg

D) 26,075 kg

Correct Answer : 26,075 kg

141 .

The gross section of the web of a beam is defined as

A) depth of the beam multiplied by its web thickness

B) width of the flange multiplied by its web thickness

C) sum of the flange width and depth of the beam multiplied by the web thickness

D) All of the above

Correct Answer : depth of the beam multiplied by its web thickness

142 .

For simply supported beams, the maximum permitted deflection, is

A) 1/325 of the span

B) 1/350 of the span

C) 1/375 of the span

D) 1/400 of the span

Correct Answer : 1/325 of the span

143 .

In a truss girder of a bridge, a diagonal consists of mild steel flat 4001.S.F. and carries a pull of 80 tonnes. If the grossdiameter of the rivet is 26 mm, the number of rivets required in the splice, is

A) 6

A)

B) 7

B)

C) 8

C)

D) 9

D)

Correct Answer : 8

144 .

Design of a riveted joint, is based on the assumption :

A) Bearing stress in the rivet is neglected

B) Load is uniformly distributed among all the rivets

C) Shear stress on a rivet is uniformly distributed over its gross area

D) All of the above

Correct Answer : All of the above

Explanation : * Bearing stress in the rivet is neglected
* Load is uniformly distributed among all the rivets
* Shear stress on a rivet is uniformly distributed over its gross area
* Bearing stress is uniform between the contact surfaces of the plate and the rivet

145 .

Maximum permissible slenderness ratio of compression members which carry dead and superimposed load, is

A) 250

B) 180

C) 80

D) 75

Correct Answer : 180

146 .

If the area of cross-section of a single angle discontinuous strut is 30 cm² and allowable working stress corresponding to its slenderness ratio is 625 kg/cm², the safe load carrying capacity of the member, is

A) 12 tonnes

A)

B) 15 tonnes

B)

C) 18 tonnes

C)

D) 20 tonnes

D)

Correct Answer : 15 tonnes

147 .

According to I.S. : 800 - 1871, lacing bars resist transverse shear equal to

A) 2.5% of the axial load

B) 3.0% of the axial load

C) 4.0% of the axial load

D) 5.0% of the axial load

Correct Answer : 2.5% of the axial load

148 .

The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to

A) 220 t

B) 230 t

C) 260 t

D) 270 t

Correct Answer : 270 t

149 .

As per ISI, rolled steel beam sections are classified into

A) two series

B) three series

C) four series

D) five series

Correct Answer : five series

150 .

Water pressure in a 80 cm water main is 10 kg/cm². The minimum thickness of the metal required for the water main, not to be stressed more than 200 kg/cm², is

A) 1 cm

A)

B) 1.5 cm

B)

C) 2 cm

C)

D) 2.5 cm

D)

Correct Answer : 2 cm

151 .

In a tension member if one or more than one rivet holes are off the line, the failure of the member depends upon :

A) pitch

B) gauge

C) diameter of the rivet holes

D) All of the above

Correct Answer : All of the above

152 .

A web plate is called unstiffened if the ratio of clear depth to thickness is less than

A) 50

B) 60

C) 85

D) 90

Correct Answer : 85

153 .

If the thickness of a structural member is small as compared to its length and width, it is classified as

A) one dimensional

B) two dimensional

C) three dimensional

D) None of the above

Correct Answer : two dimensional

154 .

In factory buildings, the horizontal beams spanning between the wall columns supporting a wall covering, are called

A) girts

B) lintels

C) trimmers

D) stringers

Correct Answer : girts

155 .

Pick up the correct statement from the following :

A) The ends of a strut, are connected together with two rivets

A)

B) The members of strut will have at least two connections spaced equidistant in their length

B)

C) The members when separated back-to-back, the connecting rivets should pass through solid washer or packing

C)

D) All of the above

D)

Correct Answer : All of the above

156 .

Rise of a Jack arch is kept about

A) 1/2 to 1/3 of the span

B) 1/3 to 1/4 of the span

C) 1/4 to 1/8 of the span

D) 1/8 to 1/12 of the span

Correct Answer : 1/8 to 1/12 of the span

157 .

If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by

A) P_s = N x (π/4) d² x P_s

A)

B) P_s = N x (d x t x p_s)

B)

C) P_s = N x (p - d) x t x P_s

C)

D) P_s = N x (P + d) x t x p_s

D)

Correct Answer : P_s = N x (π/4) d² x P_s

158 .

For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than

A) 4.5 mm

B) 6 mm

C) 8 mm

D) 10 mm

Correct Answer : 8 mm

159 .

Compression members composed of two channels back-to-back and separated by a small distance are connected together by riveting so that the minimum slenderness ratio of each member between the connections, does not exceed

A) 40

A)

B) 50

B)

C) 60

C)

D) 70

D)

Correct Answer : 40

160 .

Which of the following is true about bracket connections?

A) Fabrication cost is low

B) They are used to give aesthetic appearance to the structure

C) More rigid than any other connection

D) These connections are used to accommodate less number of bolts

Correct Answer : More rigid than any other connection

Explanation : When the lever arm is to be extended to accommodate more number of bolts, bracket connection is used. The bracket type connection are more rigid than any other type of connection. But the fabrication cost is very high, so they are not adopted in general practice.

161 .

Which of the following is not an assumption of first-order elastic analysis of rigid jointed frame?

A) materials behave linearly

B) member instability effects cannot be ignored

C) yielding effects can be ignored

D) frame instability effects can be ignored

Correct Answer : member instability effects cannot be ignored

Explanation : The following are the assumptions of first-order elastic analysis of rigid jointed frame :

* materials behave linearly
* yielding effects can be ignored
* member instability effects such as those caused by axial compression can be ignored
* frame behaves linearly frame instability effects such as those caused by moments due to horizontal frame deflection, etc can be ignored.

162 .

Which of the following about rivet is correct?

A) labour cost is low

B) it does not require skilled work

C) causes low level of noise pollution

D) removing poorly installed rivet is costly

Correct Answer : removing poorly installed rivet is costly

Explanation : * Rivet connection is associated with high level of noise pollution
* needs heating rivet to red hot
* inspection of connection is skilled work
* removing poorly installed rivet is costly
* labour cost is high.

163 .

Which of the following is advantage of HSFG bolts over bearing type bolts?

A) high strength fatigue

B) low static strength

C) joints are not rigid

D) bolts are subjected to shearing and bearing stresses

Correct Answer : high strength fatigue

Explanation : The advantages of HSFG bolts over bearing type bolts are :

* joints are rigid
* bolts are not subjected to shearing and bearing stresses as load transfer is mainly due to friction
* high static strength due to high frictional resistance
* high strength fatigue since nuts are prevented from loosening
* smaller number of bolts results into smaller number of gusset plates.

164 .

The permissible stress to which a structural member can be subjected to, is known as

A) tensile stress

B) bearing stress

C) working stress

D) compressive stress

Correct Answer : working stress

165 .

Tacking rivets in compression plates not exposed to the weather, have a pitch not exceeding 300 mm or

A) 16 times the thickness of outside plate

B) 24 times the thickness of outside plate

C) 32 times the thickness of outside plate

D) 36 times the thickness of outside plate

Correct Answer : 32 times the thickness of outside plate

166 .

Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is

A) 0.67 L

B) 0.85 L

C) 1.5 L

D) 2 L

Correct Answer : 2 L

167 .

The effective length of a double angle strut with angles placed back to back and connected to both the sides of a gusset plate, by not less than two rivets, is

A) 2 L

B) 0.85 L

C) 0.67 L

D) 0.5 L

Correct Answer : 0.85 L

168 .

According to the Unwin's formula, if t is thickness of the plate in cm, the nominal diameter of the rivet, is

A) d = 2.3 √t

B) d = 1.91 t

C) d = 1.91 t²

D) d = 1.91 √t

Correct Answer : d = 1.91 √t

169 .

The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is

A) WL³/48EI

B) WL³/3EI

C) WL⁴/3EI

D) 5WL⁵/384EI

Correct Answer : WL³/48EI

170 .

On eccentrically loaded columns, the equivalent axial load may be obtained by

A) dividing the sum of axial load and eccentric load by the product of the bending moment and appropirate bending factor

B) adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor

C) adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor

D) None of the above

Correct Answer : adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor

171 .

The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is

A) L

A)

B) 0.67 L

B)

C) 0.85 L

C)

D) 1.5 L

D)

Correct Answer : L

172 .

The ratio of shearing stress to shearing strain within elastic limit, is known as

A) modulus of elasticity

B) bulk modulus of elasticity

C) shear modulus of elasticity

D) tangent modulus of elasticity

Correct Answer : shear modulus of elasticity

173 .

For determination of allowable stress in axial compression, Indian Standard Institution has adopted

A) Euler's formula

B) Secant formula

C) Rankine formula

D) Engesser formula

Correct Answer : Secant formula

174 .

If the pitch is 6 cm and rivet value is 4 tonnes, the number of rivets required for a riveted connection carrying an eccentric load of 15 tonnes at a distance of 30 cm from the centre line, is

A) 6

A)

B) 8

B)

C) 10

C)

D) 12

D)

Correct Answer : 8

175 .

The method of design of steel framework for greatest rigidity and economy in weight, is known as

A) fully rigid design

B) simply design

C) semi-rigid design

D) None of the above

Correct Answer : fully rigid design

176 .

Rolled steel beams are designated by Indian Standard series and its

A) weight per metre and flange width

B) width of flange and weight per metre

C) weight per metre and depth of its section

D) depth of section and weight per metre

Correct Answer : depth of section and weight per metre

177 .

The effective length L of a simply supported beam with ends restrained against torsion, and also the ends of compression flange partially restrained against lateral bending, is given by

A) L = span

B) L = 0.85 span

C) L = 0.7 span

D) L = 0.75 span

Correct Answer : L = 0.85 span

178 .

The spans are considered approximately equal if the longest span does not exceed the shortest span by more than

A) 5%

B) 10%

C) 15%

D) 20%

Correct Answer : 15%

179 .

A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed

A) 200

B) 250

C) 300

D) 350

Correct Answer : 350

180 .

If the depth of the section of an upper column is smaller than the lower column

A) filler plates and bearing plates are provided with column splice

B) filler plates are provided with column splice

C) bearing plates are provided with column splice

D) neither filler plates nor bearing plates are provided with column splice

Correct Answer : filler plates and bearing plates are provided with column splice

181 .

The thickness of the web of a mild steel plate girder is less than d/200. If only one horizontal stiffener is used, it is placed at

A) the neutral axis of the section

B) 2/3rd of the depth of the neutral axis from the compression flange

C) 2/5th of the height of the neutral axis from tension flange

D) 2/5th of the depth of the neutral axis from the compression flange

Correct Answer : 2/5th of the depth of the neutral axis from the compression flange

182 .

The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is upto a height of

A) 1.25 times the effective span

B) 1.50 times the effective span

C) 2.0 times the effective span

D) 2.5 times the effective span

Correct Answer : 1.25 times the effective span

183 .

Working shear stress on the gross area of a rivet as recommended by Indian Standards, is

A) 785 kg/cm²

B) 1025 kg/cm²

C) 2360 kg/cm²

D) None of the above

Correct Answer : 1025 kg/cm²

184 .

Pick up the correct statement from the following :

A) Loaded columns are supported on column bases

A)

B) Column load is spread over a large area on concrete

B)

C) Column bases transmit the column load to the concrete foundation

C)

D) All of the above

D)

Correct Answer : All of the above

185 .

The ratio of hydrostatic stress to the volumetric strain within the elastic range, is called

A) modulus of elasticity

B) shear modulus of elasticity

C) bulk modulus of elasticity

D) All of the above

Correct Answer : All of the above

Explanation : * modulus of elasticity
* shear modulus of elasticity
* bulk modulus of elasticity
* tangent modulus of elasticity

186 .

The deflection of beams may be decreased by

A) increasing the span

B) increasing the depth of beam

C) decreasing the depth of beam

D) increasing the width of beam

Correct Answer : increasing the depth of beam

187 .

In which of the following cases pin connections are not used?

A) hinged arches

B) truss bridge girders

C) tall buildings

D) diagonal bracing connection

Correct Answer : tall buildings

Explanation : Pin connections are used in following cases :

* truss bridge girders
* hinged arches
* tie rod connection in water tanks
* as diagonal bracing connections in beams and columns
* chain-link cables suspension bridges.

188 .

Which of the following relation is correct?

A) Net area = Gross area – deductions

A)

B) Net area = Gross area * deductions

B)

C) Net area = Gross area + deductions

C)

D) Net area = Gross area / deductions

D)

Correct Answer : Net area = Gross area – deductions

189 .

Which of the following is true regarding plastic design methods?

A) difficult to design for fatigue

B) more saving in column design

C) moments produced by different loading conditions can be added together

D) lateral bracing requirements are less stringent than for elastic design

Correct Answer : difficult to design for fatigue

Explanation : * There is little saving in column design
* lateral bracing requirements are more stringent than for elastic design
* difficult to design for fatigue
* moments produced by different loading conditions needs to be calculated separately(cannot be added together) and the largest plastic moment is selected.

190 .

Among which of the following is the location of plastic hinge?

A) at supports

B) at centre of beam

C) at points away from concentrated load

D) at centre for uniformly distributed load

Correct Answer : at supports

Explanation : Plastic hinges normally occur at supports, points of concentrated load, and points where cross section change. The location of plastic hinge in a beam with uniformly distributed load is not well defined.

191 .

The distance between the outer faces of flanges of a plate girder, is known as

A) clear depth

B) overall depth

C) effective depth

D) None of the above

Correct Answer : overall depth

192 .

To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added, is

A) 13%

B) 15%

C) 18%

D) 20%

Correct Answer : 13%

193 .

The connection of one beam to another beam by means of an angle at the bottom and an angle at the top, is known as

A) seated connection

B) stiffened seated connection

C) unstiffened seated connection

D) All of the above

Correct Answer : seated connection

194 .

Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate, is reduced to

A) 50%

B) 60%

C) 70%

D) 80%

Correct Answer : 80%

195 .

Bulb angles are used in

A) bridge building

B) column building

C) ship building

D) water tank building

Correct Answer : ship building

196 .

Effective sectional area of a compression member is :

A) gross sectional ares + area of rivet hole

B) gross sectional ares x area of rivet hole

C) gross sectional ares + area of rivet hole

D) gross sectional area - area of rivet hole

Correct Answer : gross sectional area - area of rivet hole

197 .

For a cantilever beam of length L built-in at the support and restrained against torsion at the free end, the effective projecting length l is

A) l = 0.7L

B) l = 0.75L

C) l = 0.5L

D) l = 0.85L

Correct Answer : l = 0.75L

198 .

In a built up section carrying a tensile force, the flanges of two channels are turned outward

A) to minimise lacing

B) to have greater lateral rigidity

C) to simplify the transverse connections

D) All of the above

Correct Answer : to have greater lateral rigidity

199 .

If P is the wind pressure in kg/cm², v is the velocity in km/hour and K is a constant of proportionality, then

A) P = Kv²

B) v = K/P²

C) P = K/v²

D) P = Kv

Correct Answer : P = Kv²

200 .

Which load is obtained when equilibrium and plasticity conditions of plastic analysis are satisfied?

A) no solution

B) plastic limit load

C) upper bound solution of true ultimate load

D) lower bound solution of true ultimate load

Correct Answer : lower bound solution of true ultimate load

Explanation : When equilibrium and plasticity conditions of plastic analysis are satisfied, an lower bound solution of true ultimate load is obtained.

201 .

Which of the following relation between load factor, collapse load(Wc) and working load (W)

A) F = W_c / W

A)

B) F = W_c W

B)

C) F = W / W_c

C)

D) F = W_c + W

D)

Correct Answer : F = W_c / W

Explaination : Load factor is ratio of collapse load to working load. It is represented by, F = W_c / W.

202 .

Which of the following factor is considered for classification of cross section?

A) seismic force

B) length of member

C) width-to-thickness ratio

D) location where member is used

Correct Answer : width-to-thickness ratio

Explanation : Cross section are classified into four behavioural groups depending upon the material yield strength, width-to-thickness ratio of individual components (e.g. webs and flanges) within the cross section, and the loading arrangement.

203 .

Which of the following is true about torsional buckling?

A) it cannot occur with doubly symmetric cross section

B) standard hot rolled shapes are not susceptible to torsional buckling

C) failure occurs by bending about shear centre in longitudinal axis

D) failure occurs when torsional rigidity of member is greater than bending rigidity

Correct Answer : standard hot rolled shapes are not susceptible to torsional buckling

Explanation : In torsional buckling, failure occurs by twisting about shear centre in longitudinal axis. It occurs when torsional rigidity of member is appreciably smaller than bending rigidity. It can occur only with doubly symmetric cross section with very slender cross sectional elements. Standard hot rolled shapes are not susceptible to torsional buckling.

204 .

Which of the following is true about beam-column?

A) net end moments are zero

B) member subjected to bending moment

C) member subjected to axial force only

D) member subjected to axial force and bending moment

Correct Answer : member subjected to axial force and bending moment

Explanation : If the net end moments are not zero, the member will be subjected to axial force and bending moments along its length. Such members are called beam-columns.

205 .

A fillet weld whose axis is parallel to the direction of the applied load, is known as

A) side fillet weld

B) end fillet weld

C) diagonal filler weld

D) All of the above

Correct Answer : side fillet weld

206 .

Assuming the values of maximum deviation ΔP and ΔE to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is

A) 0.67

A)

B) 1.00

B)

C) 1.67

C)

D) 2.67

D)

Correct Answer : 1.67

207 .

Factor of safety is the ratio of

A) tensile stress to working stress

B) yield stress to working stress

C) bearing stress to working stress

D) compressive stress to working stress

Correct Answer : yield stress to working stress

208 .

Efficiency of a riveted joint is defined as the ratio of

A) least strength of a riveted joint to the strength of solid plate

B) greatest strength of a riveted joint to the strength of solid plate

C) least strength of a riveted plate to the greatest strength of the riveted joint

D) All of the above

Correct Answer : All of the above

209 .

The stress in the wall of a thin cylinder subjected to internal pressure, is

A) shear

B) torsional shear

C) hoop tension

D) hoop compression

Correct Answer : hoop tension

210 .

The diameter of a bolt hole is taken as the nominal diameter of the bolt plus

A) 1.6 mm

B) 1.5 mm

C) 1.4 mm

D) 1.2 mm

Correct Answer : 1.6 mm

211 .

Pick up the correct statement from the following :

A) Tacking rivets are not considered to calculate stress

A)

B) Tacking rivets are provided throughout the length of a compression member composed of two components back to back

B)

C) Tacking rivets are used if the minimum distance between centres of two adjacent rivets exceeds 12 t or 200 mm, whichever is less

C)

D) All of the above

D)

Correct Answer : All of the above

212 .

Which of the following is not a load on columns in buildings?

A) load from roofs

B) load from walls

C) load from floors

D) load from foundation

Correct Answer : load from foundation

Explanation : Axial loading on columns in buildings is due to loads from roofs, floors, and walls transmitted to the column through beams and also due to its own self weight.

213 .

What is the value of the imperfection factor for buckling class a?

A) 0.23

B) 0.21

C) 0.35

D) 0.73

Correct Answer : 0.21

Explanation : The value of the imperfection factor, α for buckling class a is 0.21. The imperfection factor considers all the relevant defects in real structure when considering buckling, geometric imperfections, the eccentricity of applied loads, and residual stresses.

214 .

In case horizontal stiffeners are not used, the distance between vertical legs of flange angles at the top and bottom of a plate girder, is known as

A) overall depth

B) clear depth

C) effective depth

D) None of the above

Correct Answer : clear depth

215 .

Rolled steel angle sections are classified as

A) bulb angles

B) equal angles

C) unequal angles

D) All of the above

Correct Answer : All of the above

216 .

Which of the following is not a compression member?

A) tie

B) boom

C) strut

D) rafter

Correct Answer : tie

Explanation : Strut, boom and rafter are compression members, whereas tie is a tension member.

217 .

Which of the following is not a parameter for decrease in strength of slender member?

A) residual stress

B) seismic load

C) initial lack of straightness

D) variation of material properties

Correct Answer : seismic load

Explanation : The decrease in strength of slender member is due to following parameter : imperfections- initial lack of straightness, accidental eccentricities of loading, residual stress, and variation of material properties over the cross section.

Civil Engineering : Steel Structure Design MCQs with Answers