Civil Engineering : Structural Design Specifications MCQs with Answers

1 .
The designed transverse shear in lacing is assumed as_____.
A)  2.5% of axial load
B)  3% of axial load
C)  3.5% of axial load
D)  4% of axial load

Correct Answer :   2.5% of axial load

2 .
The diameter of longitudinal bars of a column should never be less than?
A)  6 mm
B)  8 mm
C)  10 mm
D)  12 mm

Correct Answer :   12 mm

Explanation : Minimum diameter of longitudinal bar in RCC column shall not be less than 12mm (IS456:2000, cl 26.5.3.1 d). Indian standards specify 12mm as the least diameter of a vertical bar and 5mm as the least diameter of lateral bar or stirrup.

3 .
When the axis of load lies in the plane of rivet group, then the rivets are subjected to_______.
A)  Only tensile stresses
B)  Only shear stresses
C)  Both (A) and (B)
D)  None of the Above

Correct Answer :   Only shear stresses

4 .
Hudson's formula gives the dead weight of a truss bridge as a function of_______.
A)  Top chord area
B)  Bottom chord area
C)  Effective span of bridge
D)  Heaviest axle load of engine

Correct Answer :   Bottom chord area

5 .
For the stability of a structural part, the weight or anchorage should be_____.
A)  1.2 times the minimum overturning moment due to dead load
B)  1.4 times the minimum overturning moment due to dead load
C)  Both (A) and (B)
D)  None of the Above

Correct Answer :   Both (A) and (B)

6 .
The creep coefficient i.e. the ratio of ultimate creep and elastic strain after_________.
A)  7 days is 2.2
B)  28 days is 1.6
C)  365 days is 1.1
D)  All of the above

Correct Answer :   All of the above

7 .
For design purpose, the moment at the support where two unequal spans or spans not equally loaded meet, is_________.
A)  lesser value
B)  greater value
C)  average of two values
D)  None of the Above

Correct Answer :   average of two values

8 .
As per IS : 800-1982, the coefficient of expansion for steel per degree centigrade per unit length, is________.
A)  0.000011
B)  0.000012
C)  0.000013
D)  0.000014

Correct Answer :   0.000012

9 .
The value of the constant K in the formula As = K.bd / fs for determining the minimum area of tension reinforcement in a beam is_____.
A)  0.85
B)  0.80
C)  0.95
D)  0.90

Correct Answer :   0.85

10 .
The concrete may be accepted if the average equivalent cube strength of the cores, is at least 85% of the cube strength of the concrete grade at the specified age and no individual core possesses strength less than_______.
A)  70%
B)  75%
C)  80%
D)  85%

Correct Answer :   70%

11 .
The maximum area of tension reinforcement in beams shall not exceed?
A)  0.5%
B)  4%
C)  7%
D)  1.5%

Correct Answer :   4%

Explanation : If tensile reinforcement of beam should exceed 4% of total gross area then some crack will be developed in concrete.

12 .
The number of treads in a flight is equal to _________.
A)  risers plus one
B)  risers plus three
C)  risers minus one
D)  risers in the flight

Correct Answer :   risers minus one

Explanation : It is often not simply the sum of the individual tread lengths due to the nosing overlapping between treads. If there are N steps, the total run equals N-1 times the going: the tread of the last step is part of a landing and is not counted.

13 .
The number of seismic zones in which the country has been divided are_____.
A)  3
B)  6
C)  7
D)  5

Correct Answer :   5

14 .
Maximum pitch of rivets, used in steel stacks, is limited to (where t is thickness of thinner plate being connected)______.
A)  16t
B)  14t
C)  12t
D)  10t

Correct Answer :   10t

15 .
For rolled I-beams and channels, permissible tensile and compressive stresses does not exceed_____.
A)  1800 kg/cm²
B)  1650 kg/cm²
C)  1500 kg/cm²
D)  1400 kg/cm²

Correct Answer :   1650 kg/cm²

16 .
The flat slab is a reinforced concrete slab with or without drops and is supported__________.
A)  on beams
B)  on columns with column head
C)  on columns without column head
D)  None of the Above

Correct Answer :   on beams

17 .
The ratio of the effective length to the least radius of gyration of a tie member of a roof truss, which gets subjected to reversal of stress shall not exceed______.
A)  180
B)  200
C)  240
D)  350

Correct Answer :   350

18 .
The structure which is subjected to an imposed load after 72 hours for a period of 24 hours, is deemed to be unacceptable if it fails to recover the net deflection less than_____.
A)  75%
B)  80%
C)  85%
D)  90%

Correct Answer :   80%

19 .
For concreting of shallow sections with vibration, the work ability of concrete should be___________.
A)  medium
B)  low
C)  very low
D)  high

Correct Answer :   very low

20 .
The slenderness effect of a wall is considered if the effective height of the wall exceeds the thickness_____.
A)  8 times
B)  10 times
C)  12 times
D)  16 times

Correct Answer :   16 times

21 .
For spans upto 10 m, the safe span to depth ratio for_______.
A)  cantilever is 7
B)  simply supported beams is 20
C)  continuous beams is 26
D)  All of the above

Correct Answer :   All of the above

22 .
The angle of inclination of the lacing bars with axis of the member is kept between______.
A)  50° and 80°
B)  40° and 70°
C)  30° and 60°
D)  20° and 50°

Correct Answer :   40° and 70°

23 .
The distance of the critical section for shear from the periphery of the column or drop panal is at a distance (where d is effective depth of flat slab)_______.
A)  d
B)  d / 3
C)  d / 5
D)  d / 7

Correct Answer :   d / 5

24 .
Pick up the correct statement from the following :
A)  Net sectional area of a tension member is its gross area less deductions for holes
B)  Gross diameter of river hole is 1.5 mm in excess of its normal diameter if it is greater than 25 mm
C)  Gross diameter of the rivet hole is 2.0 mm in excess of its normal diameter if it is greater than 25 mm
D)  All of the above

Correct Answer :   All of the above

Explanation : * Net sectional area of a tension member is its gross area less deductions for holes
* Gross diameter of river hole is 1.5 mm in excess of its normal diameter if it is greater than 25 mm
* Gross diameter of the rivet hole is 2.0 mm in excess of its normal diameter if it is greater than 25 mm
* The total deduction area for the holes is obtained by the product of the thickness and sum of the diameters of the holes in any chain across the member

25 .
If the floor is supported at or near the bottom but top chords of a bridge is not braced, then the bridge is called_____.
A)  Half through type
B)  Deck type
C)  Through type
D)  Double deck type

Correct Answer :   Half through type

26 .
By providing sufficient edge distance, which of the following failures of riveted joint can be avoided?
A)  Shear failure of the rivet
B)  Shear failure of the plate
C)  Tension failure of the plate
D)  Crushing failure of the rivet

Correct Answer :   Shear failure of the plate

27 .
The maximum permissible span of asbestos cement sheets is_______.
A)  1680 mm
B)  1250 mm
C)  810 mm
D)  650 mm

Correct Answer :   1680 mm

28 .
In compression members, the lap length of a bar should not be less than_____.
A)  30 φ
B)  24 φ
C)  20 φ
D)  16 φ

Correct Answer :   24 φ

29 .
The slenderness ratio of single angle discontinuous struts conmected by a single rivet or bolt, shall not exceed_______.
A)  110
B)  130
C)  150
D)  180

Correct Answer :   180

30 .
In adverse circumtances, the reinforced concrete member immersed in sea water or subjected to sea spray, the maximum permissible cover for the reinforcing bars, should not exceed____.
A)  60 mm
B)  50 mm
C)  75 mm
D)  70 mm

Correct Answer :   75 mm

31 .
If a column is subjected to dead load and super imposed load only, the maximum ratio 1 /r should not be greater than_.
A)  180
B)  250
C)  350
D)  400

Correct Answer :   180

32 .
If the dimensions of a rectangular section of a short column are 15 cm x 20 cm, its unsupported length should be restricted to____.
A)  9.0 m
B)  10.0 m
C)  11.0 m
D)  12.0 m

Correct Answer :   9.0 m

33 .
The grade of plain concrete to be used in sea water or structures exposed to sea water, should be____.
A)  M lO
B)  M 15
C)  M 20
D)  M 30

Correct Answer :   M 15

34 .
The pH value of water to be used in concrete shall generally be_____.
A)  not less than 5
B)  not more than 7
C)  not less than 6
D)  not more than 6

Correct Answer :   not less than 6

35 .
M 30 grade concrete means, its compressive strength of 15-cm cube, is 30 N/mm² after____.
A)  3 days
B)  7 days
C)  21 days
D)  28 days

Correct Answer :   28 days

36 .
For achieving suitably a low permeability____.
A)  proper compaction is done
B)  low water - cement ratio is used
C)  proper curing is done for hydration
D)  All of the above

Correct Answer :   All of the above

Explanation : * proper compaction is done
* low water - cement ratio is used
* proper curing is done for hydration
* strong and dense aggregates are used

37 .
Minimum thickness of steel work directly exposed to weather and accessible for cleaning and repainting, the thickness should be not less than_____.
A)  6 mm
B)  7 mm
C)  8 mm
D)  10 mm

Correct Answer :   6 mm

38 .
In limit state method, the design bond stress of M 30 grade concrete for plain bars in tension, is_____.
A)  1.O N/mm²
B)  1.2 N/mm²
C)  1.5 N/mm²
D)  2.1 N/mm²

Correct Answer :   1.5 N/mm²

39 .
If the end of a beam of span L carrying a designed load W is partially restrained by a built up wall, it is designed to resist the negative moment at the face of the support, equal to_____.
A)  WL / 28
B)  WL / 24
C)  WL / 16
D)  WL / 10

Correct Answer :   WL / 24

40 .
Generally acceptable nominal size of aggregates for reinforced concrete, is________.
A)  25 mm
B)  20 mm
C)  15 mm
D)  10 mm

Correct Answer :   20 mm

41 .
The minimum diameter of longitudinal reinforcement of a column should not be less than____
A)  8 mm
B)  10 mm
C)  12 mm
D)  20 mm

Correct Answer :   20 mm

42 .
For all practical purposes, the modulus of elasticity of steel is assumed_____.
A)  200 kN/mm²
B)  225 kN/mm²
C)  250 kN/mm²
D)  275 kN/mm²

Correct Answer :   200 kN/mm²

43 .
The grade of reinforced concrete to be used in sea water or structures exposed to sea water should be_______.
A)  M 10
B)  M 15
C)  M 20
D)  M 30

Correct Answer :   M 20

44 .
If the specified thickness of a footing is 100 cm, the depth of the form work may be tolerated from_____.
A)  - 3 mm to + 3 mm
B)  - 5 mm to + 5 mm
C)  - 2 mm to + 2 mm
D)  - 4 mm to + 4 mm

Correct Answer :   - 5 mm to + 5 mm

45 .
If the main reinforcement of the slab is parallel to a T-beam, the transverse reinforcement at mid span of the slab is provided at least _____of main reinforcement
A)  40%
B)  50%
C)  60%
D)  70%

Correct Answer :   60%

46 .
A foundation rests on ________.
A)  subgrade
B)  foundation soil
C)  base of the foundation
D)  foundation soil and subgrade

Correct Answer :   foundation soil and subgrade

Explanation : A foundation (or, more commonly, base) is the element of an architectural structure which connects it to the ground, and transfers loads from the structure to the ground. Foundations are generally considered either shallow or deep. Foundation engineering is the application of soil mechanics and rock mechanics (Geotechnical engineering) in the design of foundation elements of structures.

47 .
For initial estimate for a beam design, the width is assumed?
A)  1/5th of span
B)  1/10th of span
C)  1/15th of span
D)  1/30th of span

Correct Answer :   1/30th of span

Explanation : Design codes prescribe beam width limitations to minimise the shear lag effect on the formation of full-width plastic hinges and achieving the expected capacity. However, owing to insufficient experimental and analytical studies, empirical design formulas for the beam width limitation, with remarkably different results, have been implemented in different design codes. In this paper, parametric studies of the influence of key parameters on the behaviour of wide beam–column connections are conducted based on available test results. An effective beam-width model is analytically developed using the equivalent-frame representation, where the effects of torsion of transverse beams and flexure around the joint core are considered. The validity of the model is verified using flexural strengths of test specimens, covering a wide range of design parameters.

48 .
Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at ________.
A)  mid span
B)  supports
C)  quarter span
D)  every section

Correct Answer :   mid span

Explanation : Since BM is maximum at midspan, design should be done for maximum bending moment so that it will take care for other section. Moment formula we are using is (wl2/8) which mid span moment.

49 .
High strength concrete is used in prestressed member?
A)  To provide high bond stresses
B)  To overcome cracks due to shrinkage
C)  To overcome bursting stresses, provide high bond stresses and overcome cracks
D)  To ovecome bursting stresses at the ends

Correct Answer :   To overcome bursting stresses, provide high bond stresses and overcome cracks

Explanation : The primary difference between high-strength concrete and normal-strength concrete relates to the compressive strength that refers to the maximum resistance of a concrete sample to applied pressure. Although there is no precise point of separation between high-strength concrete and normal-strength concrete, the American Concrete Institute defines high-strength concrete as concrete with a compressive strength greater than 6,000 psi.

50 .
The effective length of a fillet weld should not be less than____.
A)  Weld size
B)  Four times the weld size
C)  Two times the weld size
D)  Six times the weld size

Correct Answer :   Four times the weld size

51 .
The reinforcing bars in beams are not bundled in contact if the diameter of the bars, exceeds
A)  20 mm
B)  30 mm
C)  35 mm
D)  36 mm

Correct Answer :   36 mm

52 .
For the reinforced concrete member totally immersed in sea water, the normal cover provided for the reinforcing bars is further increased by____.
A)  20 mm
B)  30 mm
C)  40 mm
D)  50 mm

Correct Answer :   40 mm

53 .
The effective and actual lengths of a cantilever are same if continuous at the support,_______.
A)  restrained against torsion at the support and free at the end
B)  unstrained against torsion at the support and free at the end
C)  with partial restraint against torsion of the support and free at the end
D)  None of the Above

Correct Answer :   restrained against torsion at the support and free at the end

54 .
The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least______.
A)  1/2
B)  1/3
C)  3/2
D)  2.0

Correct Answer :   1/2

55 .
The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of______.
A)  30 N/mm²
B)  20 N/mm²
C)  10 N/mm²
D)  7 N/mm²

Correct Answer :   20 N/mm²

56 .
If the ends of the compression flanges of simply supported girders are fully restrained against lateral bending, the effective length is taken as______.
A)  span
B)  0.5 x span
C)  0.7 x span
D)  0.85 x span

Correct Answer :   0.7 x span

57 .
The individual part of the structures is subjected to a load test for 24 hours by applying a load equal to full dead load of the structure plus______.
A)  imposed load
B)  1.15 times imposed load
C)  1.25 times imposed load
D)  1.3 times imposed load

Correct Answer :   1.25 times imposed load

58 .
The width of lacing bars in mm is kept________.
A)  equal to nominal rivet diameter
B)  twice the nominal rivet diameter
C)  thrice the nominal rivet diameter
D)  maximum of the above rounded to nearest 5 mm

Correct Answer :   maximum of the above rounded to nearest 5 mm

59 .
Removal of props under___________.
A)   slabs spanning upto 4.5 m is 7 days
B)  slabs spanning more than 4.5 m is 14 days
C)  beams spanning upto 6 m is 14 days
D)  All of the above

Correct Answer :   All of the above

Explanation : * slabs spanning upto 4.5 m is 7 days
* slabs spanning more than 4.5 m is 14 days
* beams spanning upto 6 m is 14 days
* beams spanning more than 6 m is 21 days

60 .
Columns are designed for a minimum eccentricity equal to 1/30 (unsupported length ofthe column), subject to a minimum of_________.
A)  20 mm
B)  15 mm
C)  10 mm
D)  5 mm

Correct Answer :   20 mm

61 .
The minimum area of cross section of reinforcement in either direction of a slab should not be less than _____ of the slab cross section.
A)  0.10%
B)  0.15%
C)  0.20%
D)  0.75%

Correct Answer :   0.15%

62 .
For concreting of heavily reinforced sections without vibration, the workability of concrete should be_____.
A)  high
B)  medium
C)  low
D)  very low

Correct Answer :   high

63 .
The advantage of reinforced concrete is due to ________.
A)  monolithic character
B)  moulding in any desired shape
C)  fire-resisting and durability
D)  monolithic character, moulding any shape and fire-resisting

Correct Answer :   monolithic character, moulding any shape and fire-resisting

Explanation : Reinforced concrete (RC) is a composite material in which concrete’s relatively low tensile strength and ductility are counteracted by the inclusion of reinforcement having higher tensile strength or ductility.

The reinforcement is usually, though not necessarily, steel reinforcing bars (rebar) and is usually embedded passively in the concrete before the concrete sets. Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure.

Modern reinforced concrete can contain varied reinforcing materials made of steel, polymers or alternate composite material in conjunction with rebar or not. Reinforced concrete may also be permanently stressed (in tension), so as to improve the behaviour of the final structure under working loads.

64 .
Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than_____.
A)  300 mm
B)  600 mm
C)  1000 mm
D)  All of the above

Correct Answer :   1000 mm

65 .
Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is______.
A)  70%
B)  60%
C)  50%
D)  40%

Correct Answer :   60%

66 .
The moment-curvature relation at a plastic hinge is_______.
A)  Linear
B)  Parabolic
C)  Constant moment for all curvatures
D)  Constant curvature for all moments

Correct Answer :   Constant moment for all curvatures

67 .
For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as (where p is basic wind pressure)_____.
A)  ±0.2p
B)  ±0.5p
C)  ±0.7p
D)  None of the Above

Correct Answer :   ±0.2p

68 .
The sway bracing is designed to transfer_________.
A)  10% of the top panel wind load to bottom bracing
B)  20% of the top panel wind load to bottom bracing
C)  25% of the top panel wind load to bottom bracing
D)  50% of the top panel wind load to bottom bracing

Correct Answer :   50% of the top panel wind load to bottom bracing

69 .
The internal pressure coefficient on walls for buildings with large permeability is taken as
A)  0
B)  ±0.2
C)  ±0.5
D)  ±0.7

Correct Answer :   ±0.7

70 .
If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be________.
A)  40 mm
B)  60 mm
C)  80 mm
D)  100 mm

Correct Answer :   60 mm

71 .
For the plain reinforcing bars in compression, the permissible design bond stress in tension, is increased by_______.
A)  5%
B)  15%
C)  30%
D)  25%

Correct Answer :   30%

72 .
The cover to the main reinforced may be reduced up to one third of the specified cover but not less than________.
A)  5 mm
B)  7 mm
C)  10 mm
D)  15 mm

Correct Answer :   5 mm

73 .
The reduced level of third floor of a building near a column is 205.350 m. The reduced levels of the undersides of four beams supporting the fourth floor framing into the column mutually perpendicular are 208.350 m, 208.450 m, 208.500 m and 208.550 m. The supported length of the column is
A)  1.100 m
A)  
B)  3.000 m
B)  
C)  3.200 m
C)  
D)  3.700 m
D)  

Correct Answer :   3.000 m

74 .
The distance between, rivet line and the nearest edge of a joint not exposed to weather, is taken (where t is thickness in mm of the thinner outside plate)________.
A)  6 t
B)  8 t
C)  10 t
D)  12 t

Correct Answer :   12 t

75 .
The minimum pitch i.e., the distance between centres of rivet holes is not less than_____.
A)  3.0 times the hole diameter
B)  2.5 times the hole diameter
C)  2.0 times the hole diameter
D)  1.5 times the hole diameter

Correct Answer :   2.5 times the hole diameter

76 .
Dispersion of load through the flange to web is considered as dispersed uniformly at an angle θ° is____.
A)  15°
B)  20°
C)  25°
D)  30°

Correct Answer :   30°

77 .
The grade of concrete generally not used in the reinforced concrete, is______.
A)  M 10
B)  M 15
C)  M 20
D)  M 40

Correct Answer :   M 10

78 .
For battened struts, the effective length is increased by_____.
A)  5%
B)  7.5%
C)  10%
D)  12.5%

Correct Answer :   10%

79 .
The test strength of the sample is taken as the average of the strength of_______.
A)  3 specimens
B)  4 specimens
C)  5 specimens
D)  6 specimens

Correct Answer :   3 specimens

80 .
The maximum deflection of a structure should not normally exceed lesser of the span/350 or____.
A)  10 mm
B)  15 mm
C)  20 mm
D)  25 mm

Correct Answer :   20 mm

81 .
The maximum area of compression reinforcement in a beam of cross section B x D is limited to____.
A)  0.05 BD
B)  0.04 BD
C)  0.03 BD
D)  0.02 BD

Correct Answer :   0.04 BD

82 .
Moist curing of the exposed surfaces of concrete is done at least for____.
A)  3 days
B)  5 days
C)  7 days
D)  14 days

Correct Answer :   7 days

83 .
If the ratio of effective span to overall depth of a simply supported beam is equal or greater than 1 but less than or equal to 2, the lever arm, is_______.
A)  0.2 (l + 2D)
B)  0.2 (l + 3D)
C)  0.3 (l + 2D)
D)  0.3 (l + 3D)

Correct Answer :   0.2 (l + 2D)

84 .
The greater clear dimension of web of thickness't' should not exceed_______.
A)  180 t
B)  200 t
C)  240 t
D)  270 t

Correct Answer :   270 t

85 .
The minimum length of the side or diameter of the column base shall not be less than (where d is the minimum diameter of the column)_________.
A)  (d + 75) mm
B)  1.2 (d - 75) mm
C)  1.5 (d + 75) mm
D)  1.6 (d + 75) mm

Correct Answer :   1.5 (d + 75) mm

86 .
The thickness of flat double lacing, is taken (where l is the effective length of the bar).
A)  l / 20
B)  l / 30
C)  l / 40
D)  l / 60

Correct Answer :   l / 60

87 .
Minimum thickness of steel work directly exposed to weather but not accessible for cleaning and repainting, the thickness should be not less than_________.
A)  4 mm
B)  8 mm
C)  6 mm
D)  7 mm

Correct Answer :   8 mm

88 .
The side face reinforcement is provided if the depth of the web of a beam exceeds______.
A)  750 mm
B)  700 mm
C)  650 mm
D)  600 mm

Correct Answer :   750 mm

89 .
For nominal mix concrete M 20, the required quantity of water per 50 kg. of cement, is_____.
A)  30 litres
B)  34 litres
C)  45 litres
D)  60 litres

Correct Answer :   30 litres

90 .
Four reinforcing bars of 30 mm diameter each, are bundled in contact. The lower two bars extend up to end supports. The distance between the points of termination of the upper bars, is kept___.
A)  0.75 m
B)  0.9 m
C)  1.2 m
D)  zero

Correct Answer :   1.2 m

91 .
The development length of each bar of three bars bundled together is increased by____.
A)  10%
B)  20%
C)  25%
D)  33%

Correct Answer :   33%

92 .
The actual length of a column provided with a cap and base, is the distance between_______.
A)  top of the base and top of the cap
B)  bottom of the base and top of the cap
C)  top of the base and underside of the cap
D)  bottom of the base and underside of the cap

Correct Answer :   bottom of the base and top of the cap

93 .
The maximum bending moment in a purlin of length L when subjected to a distributed load ω, is assumed_____.
A)  ωL/ 6
B)  ωL/ 8
C)  ωL/ 10
D)  ωL/ 12

Correct Answer :   ωL/ 10

94 .
The anchorage value of standard U-type hook of a reinforcing bar of diameter d in tension, is_____.
A)  16 d
B)  12 d
C)  8 d
D)  4 d

Correct Answer :   16 d

95 .
A simply supported beam shall be deemed to be a deep beam if the ratio of its effective span to overall depth, is____.
A)  2.0
B)  2.5
C)  less than 2
D)  less than 2.5

Correct Answer :   2.0

96 .
Moist sand may contain surface water by mass upto____.
A)  9.5%
B)  7.5%
C)  5.0%
D)  2.5%

Correct Answer :   2.5%

97 .
The minimum horizontal distance between two parallel main reinforcing bars, is_______.
A)  the diameter of the bar if their diameters are same
B)  5 mm more than nominal maximum size of the coarse aggragate
C)  the diameter of the longer bar if their diameters are unequal
D)  greatest value of the above

Correct Answer :   greatest value of the above

98 .
The spans of filler joists supporting a slab may be considered approximately equal if the longest span does not exceed the shortest span more than_____.
A)  20%
B)  15%
C)  10%
D)  5%

Correct Answer :   15%

99 .
The permissible bending stresses Pbet for steel slab bases should not exceed
A)  1500 kg/cm²
A)  
B)  1650 kg/cm²
B)  
C)  1800 kg/cm²
C)  
D)  1890 kg/cm²
D)  

Correct Answer :   1500 kg/cm²

100 .
For nominal mix concrete M 15, the required weight of fine and coarse aggregates is 350 kg and the volume of water is____.
A)  45 litres
B)  34 litres
C)  32 litres
D)  30 litres

Correct Answer :   32 litres

101 .
The maximum characteristic strength of the stirrups reinforcement, is taken_____.
A)  350 N/mm²
B)  375 N/mm²
C)  395 N/mm²
D)  415 N/mm²

Correct Answer :   415 N/mm²

102 .
The actual thickness of butt weld as compared to the thickness of plate is usually_____.
A)  More
B)  Less
C)  Equal
D)  None of the Above

Correct Answer :   More

103 .
A circular column section is generally not used in actual practice because________.
A)  It is uneconomical
B)  It cannot carry the load safely
C)  It is difficult to connect beams to the round sections
D)  All of the above

Correct Answer :   It is difficult to connect beams to the round sections

104 .
The connection of intermediate vertical stiffeners to the web, not subjected to external loads, shall be designed for a minimum shear force (kN/m) of
(where, t = the web thickness in mm h = the outstand of stiffener in mm)
A)  175 t²/h
A)  
B)  125 t²/h
B)  
C)  75 t²/h
C)  
D)  125 t³/h²
D)  

Correct Answer :   125 t²/h

105 .
Diameter of a bolt hole is usually taken as______.
A)  Gross diameter of bolt
B)  Nominal diameter +1.5 mm
C)  Nominal diameter +2.0 mm
D)  Nominal diameter of bolt

Correct Answer :   Nominal diameter +1.5 mm

106 .
The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is____.
A)  2.5 mm
B)  2.0 mm
C)  1.5 mm
D)  1.0 mm

Correct Answer :   1.5 mm

107 .
Minimum pitch provided in riveted steel tanks is (where d is diameter of rivets)______.
A)  1.5 d
B)  2.0 d
C)  2.5 d
D)  3.0 d

Correct Answer :   3.0 d

108 .
The allowable tensile stress in structural mild steel plates for steel tank is assumed as__________.
A)  105.5 MPa on net area
B)  150.0 MPa on gross area
C)  105.5 MPa on gross area
D)  95.0 MPa on net area

Correct Answer :   105.5 MPa on net area

109 .
The shape factor of an isosceles triangle for bending about the axis parallel to the base is:
A)  1.5
B)  1.7
C)  2.0
D)  2.34

Correct Answer :   2.34

110 .
Which of the following conditions is to be satisfied both in elastic and plastic analysis?
A)  Yield condition
B)  Equilibrium condition
C)  Mechanism condition
D)  Plastic moment condition

Correct Answer :   Equilibrium condition

111 .
The area of the concrete in compression plus the area of reinforcement transferred on the basis of modular ratio, is called_______.
A)  cracked section
B)  equivalent section
C)  transferred section
D)  All of the above

Correct Answer :   cracked section

112 .
The gap between web plates and flange plates for fillet welds should not be more than_____.
A)  0.5 mm
B)  0.75 mm
C)  1.25 mm
D)  1.5 mm

Correct Answer :   1.5 mm

113 .
A column of rectangular section is considered short, if both the slenderness ratios are less than____.
A)  8
B)  10
C)  12
D)  16

Correct Answer :   12

114 .
The tolerances for the form work of columns and beams range from_____.
A)  - 8 mm to + 12 mm
B)  - 6 mm to + 12 mm
C)  - 4 mm to + 8 mm
D)  - 3 mm to + 6 mm

Correct Answer :   - 6 mm to + 12 mm

115 .
The total area of side face reinforcement, in case of a deep beam should not be less than_______.
A)  0.1% of web area
B)  0.2% of web area
C)  0.3% of web area
D)  0.4% of web area

Correct Answer :   0.2% of web area

116 .
The average 28 days compressive strength of at least three 15 cm concrete cubes prepared with available water as compared to the average strength of three similer concrete cubes prepared with distilled water, should be at least
A)  90%
A)  
B)  80%
B)  
C)  70%
C)  
D)  95%
D)  

Correct Answer :   90%

117 .
The maximum pitch of rivets for compression and tension members should not exceed______.
A)  32 t
B)  40 t
C)  300 mm
D)  Both (A) and (C)

Correct Answer :   Both (A) and (C)

118 .
The ratio of the effective lengths of two columns, one effectively held in position at one end and partially restrained at the other end, and the other effectively held in position at one end and free at the other end, is
A)  1 / 2
A)  
B)  2 / 3
B)  
C)  3 / 4
C)  
D)  3 / 2
D)  

Correct Answer :   3 / 4

119 .
In case of timber structures, the simple bending formula M = fz may be applied for_______.
A)  Rectangular beams up to 300 mm depth
B)  Solid circular beams only
C)  All rectangular beams
D)  All square cross-section beams

Correct Answer :   Rectangular beams up to 300 mm depth

120 .
Battening is preferable when the

i) column carries axial load only
ii) space between the two main components is not very large
iii) column is eccentrically loaded

The correct answer is
A)  Only (i)
A)  
B)  Only (iii)
B)  
C)  Both (i) and (ii)
C)  
D)  Both (ii) and (iii)
D)  

Correct Answer :   Both (i) and (ii)

121 .
In case of timber structures, the form factor for solid circular cross-section is taken as______.
A)  1.414
B)  1.67
C)  1.18
D)  1.81

Correct Answer :   1.18

122 .
The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as_______.
A)  1.3 L
B)  1.1 L
C)  1.5 L
D)  1.8 L

Correct Answer :   1.1 L

123 .
A butt weld is specified by______.
A)  Size of weld
B)  Plate thickness
C)  Penetration thickness
D)  Effective throat thickness

Correct Answer :   Effective throat thickness

124 .
For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
A)  Equal angles back to back
B)  Unqual legged angles with long legs back to back
C)  Unequal legged angles with short legs back to back
D)  None of the Above

Correct Answer :   Unqual legged angles with long legs back to back

125 .
According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)
A)  Lesser of 200 mm and 12t
B)  Lesser of 200 mm and 16t
C)  Lesser of 300 mm and 32t
D)  Lesser of 300 mm and 24t

Correct Answer :   Lesser of 200 mm and 12t

126 .
Which of the following sections should preferably be used at places where torsion occurs?
A)  Angle section
B)  Channel section
C)  Box type section
D)  Any of the above

Correct Answer :   Box type section

127 .
Bending compressive and tensile stresses respectively are calculated based on______.
A)  Net area in both cases
B)  Net area and gross area
C)  Gross area and net area
D)  Gross area in both cases

Correct Answer :   Gross area and net area

128 .
The mechanism method of plastic analysis satisfies_________.
A)  Equilibrium condition only
B)  Mechanism and plastic moment conditions
C)  Equilibrium and plastic moment conditions
D)  Equilibrium and mechanism conditions

Correct Answer :   Equilibrium and mechanism conditions

129 .
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
A)  Is at the maximum distance from CG of the rivet group
A)  
B)  Gives the minimum angle between the two forces Fa and Fm
B)  
C)  Is at the minimum distance from CG of the rivet group
C)  
D)  Gives the maximum angle between the two forces Fa and Fm
D)  

Correct Answer :   Gives the minimum angle between the two forces Fa and Fm

130 .
If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin’s formula will be_____.
A)  27 mm
B)  24 mm
C)  20 mm
D)  16 mm

Correct Answer :   24 mm

131 .
Bolts are most suitable to carry______.
A)  Axial tension
B)  Shear
C)  Bending
D)  Shear and bending

Correct Answer :   Axial tension

132 .
In moment resistant connections, the moment resistance of riveted connection depends upon_______.
A)  Shear in rivets
B)  Compression in rivets
C)  Tension in rivets
D)  Strength of rivets in bearing

Correct Answer :   Tension in rivets

133 .
Generally the purlins are placed at the panel points so as to avoid______.
A)  Deflection of rafter
B)  Axial force in rafter
C)  Bending moment in rafter
D)  Shear force in rafter

Correct Answer :   Bending moment in rafter

134 .
The bracing between two columns of a steel tank will be designed to resist_______.
A)  Horizontal shear due to wind or earthquake only
B)  Column loads + full horizontal shear due to wind or earthquake
C)  Column loads + 2.5% of horizontal shear due to wind or earthquake
D)  Horizontal, shear due to wind or earthquake + 2.5% of column loads

Correct Answer :   Horizontal, shear due to wind or earthquake + 2.5% of column loads

135 .
Bearing stiffener in a plate girder is used to_____.
A)  Prevent excessive deflection
B)  Prevent buckling of web
C)  Decrease the effective depth of web
D)  Transfer the load from the top flange to the bottom one

Correct Answer :   Prevent buckling of web

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