1. 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
Correct : C. 24 mm
2. A major beam in a building structure, is known as
Correct : D. all the above
3. Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be
between
Correct : C. 40° to 70°
4. In case of cantilever fillers, the ratio of the span L to depth d, should not exceed
Correct : C. 12
5. The internal pressure coefficient on walls for buildings with large permeability is taken as
Correct : C. ± 0.7
6. The gross diameter of a rivet is the diameter of
Correct : B. rivet after driving
7. The centrifugal force due to curvature of track is assumed to act on the bridge at a height of
Correct : C. 1.83 m above the rail level
8. The tensile strength of mild steel for bolts and nuts should not be less than
Correct : D. 44 kg/mm2
9. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is
Correct : C. 60 %
10. In double lacing, the thickness t of flat lacing is
Correct : C. t < 1/60 th length between inner end rivets
11. According to IS Specifications, the effective length of a column effectively held in position at both
ends and restrained in direction at one end is taken as
Correct : B. 0.8 l
12. If M is the moment due to a couple in a bearing plate whose width is b and allowable bending
stress is P, the thickness (t) of the bending plate of the column splice, is
Correct : B. t m/(b × p)]
13. The web crippling due to excessive bearing stress can be avoided by
Correct : C. increasing the length of the bearing plates
14. 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
Correct : D. 80 %
15. The number of seismic zones in which the country has been divided is
Correct : B. 5
16. Load factor is
Correct : C. always greater than factor of safety
17. When a tension member is made of four angles with a plate as a web, the allowance for holes is
made as
Correct : C. one hole for each angle and two holes for the web
18. The effective length of a battened column is increased by
Correct : B. 10 %
19. To keep the intensity of bearing pressure between the column base and concrete compressive and
to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be
Correct : D. l/6
20. The spans are considered approximately equal if the longest span does not exceed the shortest
span by more than
Correct : C. 15 %
21. The mechanism method and the statical method give
Correct : B. upper and lower bounds respectively on the strength of structure
22. When two plates are placed end to end and are joined by two cover plates, the joint is known as
Correct : D. double cover butt joint
23. The strength of a riveted lap joint is equal to its
Correct : D. least of (a), (b) and (c)
24. Number of rivets required in a joint, is
Correct : D. load/rivet value
25. If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then
impact factor is taken as
Correct : C. between 0.5 and 1.0
26. A riveted joint many experience
Correct : D. all the above
27. Diameter of a bolt hole is usually taken as
Correct : B. nominal diameter + 1.5 mm
28. 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
Correct : C. 0.85 l
29. The range of economical spacing of trusses varies from
Correct : A. l/3 to l/5
30. Effective sectional area of a compression member is:
Correct : A. gross sectional area - area of rivet hole
31. The maximum slenderness ratio of a steel column, the design of which is governed by wind or
seismic forces is
Correct : C. 250
32. In plastic analysis, the shape factor for circular sections, is
Correct : C. 1.697
33. The external wind pressure acting on a roof depends on
Correct : B. slope of roof
34. 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
Correct : D. 82
35. The actual thickness of butt weld as compared to the thickness of plate is usually
Correct : A. more
36. The ratio of longitudinal stress to strain within elastic limit, is known as
Correct : A. modulus of elasticity
37. The slenderness ratio of lacing bars should not exceed
Correct : C. 145
38. In a fillet weld placed on the sides of the base, the metal experiences
Correct : D. all the above
39. For steel members not exposed to weather, the thickness of steel should not be less than
Correct : B. 6 mm
40. When a tension member consists of two channel sections, the allowance for rivet hole is made for
two holes from
Correct : D. each web or one hole from each flange whichever is less
41. If a pair of angles placed back to back in tension are connected by one leg of each angle, the net
effective area of the section, is
Correct : D. a + [b/{1 + 0.2 (b/a)}]
42. P E to be 25% of the computed value
of P and E respectively, the minimum value of the factor of safety is
Correct : C. 1.67
43. A beam is defined as a structural member subjected to
Correct : B. transverse loading
44. The allowable stress in axial tension for rolled I-sections and channels, is taken as
Correct : B. 1500 kg/cm2
45. Secant formula for direct stress in compression, is applicable only for slenderness ratio upto
Correct : C. 140
46. A compression member consisting of angle sections may be a
Correct : D. all the above
47. The main advantage of a steel member, is:
Correct : D. all the above
48. A riveted joint may experience
Correct : D. all the above
49. 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
Correct : C. 2.0 mm thickness of packing
50. To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added,
is
Correct : B. 13 %
51. If the moment of inertia of a section about its axis is and its effective sectional area is , its
radius of gyration r about the axis, is
Correct : B. r i/a)
52. A structural member subjected to compressive stress in a direction parallel to its longitudinal axis,
is generally known as
Correct : D. all the above
53. Live load
Correct : D. all the above
54. The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is
Correct : C. 250
55. The average shear stress for rolled steel beam section, is
Correct : B. 945 kg/cm2
56. For a rectangular section, the ratio of the maximum and average shear stresses, is
Correct : A. 1.5
57. For the steel member exposed to weather and accessible for repainting, the thickness of steel
should not be less than (accepting the webs of Indian Standard rolled steel joists and channels).
Correct : B. 6 mm
58. The permissible stress in bending for rolled steel I-beams and channels, is
Correct : D. 1650 kg/cm2
59. 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
Correct : C. staggered pitch
60. The effective length 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
Correct : B. l = 0.85 span
61. The permissible bearing stress in steel, is
Correct : B. 1890 kg/cm2
62. 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
Correct : D. 13
63. The bending moment for filler joists at the middle of an intermediate span, is
Correct : D. wl²/12
64. A simply supported beam carrying a central load, will be safe in deflection if the ratio of its span to
depth, is
Correct : B. < 24
65. When a load is transferred through one surface to another surface in contact, the stress is known
as
Correct : D. none of these
66. If p and d are pitch and gross diameter of rivets, the efficiency ( ) of the riveted joint, is given by
Correct : C. = p - d/p
67. The slenderness ratio of a column is zero when its length
Correct : D. is between the points of zero moments
68. The maximum axial load which is just sufficient to keep a column in a small deflected shape, is
called
Correct : D. all the above
69. Spans of continuous fillers are considered approximately equal if the longest span does not exceed
the shortest span by more than
Correct : C. 15 %
70. The ratio of the span L of the filler joists to the depth d from the underside of the joist to the top
of the structural concrete, should not exceed
Correct : C. 35
71. With a percentage increase of carbon in steel, decreases its
Correct : D. ductility
72. The allowable stress in axial tension is generally kept less if thickness of the member is more than
Correct : D. 20 mm
73. The maximum permissible slenderness ratio of compression member carrying dead and
superimposed load, is
Correct : A. 180
74. Tacking rivets in compression plates not exposed to the weather, have a pitch not exceeding 300
mm or
Correct : C. 32 times the thickness of outside plate
75. A single angle in tension is connected by one leg only. If the areas of connecting and outstanding
legs are respectively a and b, net effective area of the angle, is
Correct : B. a + [b/{1 + 0.35 (b/a)}]
76. If L is the overall length of a combined footing having A as its area, d being the distance between
the centre of gravity of the base and centre of the base, the larger width b is
Correct : B. (a/l) + (6ad/l²)
77. Select the correct statement
Correct : C. Bolts are used as a temporary fastening whereas rivets are used as permanentfastenings
78. In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate
Correct : C. 50% by direct bearing and 50% through fastenings
79. If the floor is supported at or near the bottom but top chords of a bridge is not
braced, then the bridge is called
Correct : C. Half through type
80. The elastic strain for steel is about
Correct : C. 1/12 of strain at the initiation of strain hardening and 1/200 of maximumstrain
81. In moment resistant connections, the moment resistance of riveted connection
depends upon
Correct : C. Tension in rivets
82. The moment of the couple set up in a section of a beam by the longitudinal
compressive and tensile force, is known as
Correct : B. Moment of resistance
83. 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
Correct : C. 2/5th of the depth of the neutral axis from the compressionflange
84. The most commonly used sections in lateral system to carry shear force in built up
columns, are
Correct : D. All the above
85. The bracing between two columns of a steel tank will be designed to resist
Correct : B. Horizontal, shear due to wind or earthquake + 2.5% of column loads
86. A beam may be designed as a cased beam if
Correct : D. All the above
87. In a built up beam actual bending compressive stress fbc is given by (when y1 is
the distance of the edge of the beam from the neutral axis).
Correct : A. fbc = (M/Ixx) × y
88. If the thickness of a structural member is small as compared to its length and
width, it is classified as
Correct : B. Two dimensional
89. 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
Correct : A. 40
90. 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 and h = the outstand of stiffener in mm)
Correct : C. 125 t²/h
91. When the upper column does not provide full bearing area over lower column, the column splice is provided with the following assumption
Correct : D. All the above
92. 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
Correct : A. Bending moment at the centre of the beam
93. The allowable shear stress in the web of mild steel beams decreases with (Where 'h is thickness)
Correct : B. Increase in h/t ratio
94. On eccentrically loaded columns, the equivalent axial load may be obtained by
Correct : A. Adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor
95. 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 gross-diameter of the rivet is 26 mm, the number of rivets required in the splice, is
Correct : C. 8
96. When the bolts are subjected to reversal of stresses, the most suitable type of bolt
is
Correct : D. High strength bolt
97. The size of a butt weld is specified by the effective throat thickness which in the case of incomplete penetration, is taken as
Correct : D. 7/8 of the thickness of thinner part
98. In a built up section carrying a tensile force, the flanges of two channels are turned
outward
Correct : C. To have greater lateral rigidity
99. The overlap of batten plates with the main members in welded connections should be more than
Correct : B. 4 t
100. 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
Correct : C. Total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment