RBI Assistant - Design of Steel Structures 1000+ MCQ [Solved] PDF Download
Thursday 9th of March 2023
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1. The equivalent axial load may be defined as the load which produces a stress equal to
A. Maximum stress produced by the eccentric load
B. Maximum stressed fibre
C. Bending stress
D. None of these
Answer : A
A. Maximum stress produced by the eccentric load
B. Maximum stressed fibre
C. Bending stress
D. None of these
Answer : A
2. The basic wind speed is specified at a height 'h' above mean ground level in an open terrain. The value of 'h' is
A. 10 m
B. 20 m
C. 25 m
D. 50 m
Answer : A
A. 10 m
B. 20 m
C. 25 m
D. 50 m
Answer : A
3. 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
B. 8
C. 10
D. 15
Answer : B
A. 6
B. 8
C. 10
D. 15
Answer : B
4. The effective length of a battened column is increased by
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : B
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : B
5. The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is
A. WL3/3EI
B. WL4/3EI
C. WL3/48EI
D. 5WL4/384EI
Answer : C
A. WL3/3EI
B. WL4/3EI
C. WL3/48EI
D. 5WL4/384EI
Answer : C
6. 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
B. HT grade of thickness exceeding 45 mm
C. HT grade of thickness not exceeding 45 mm
D. All the above
Answer : D
A. HTW grade of thickness exceeding 32 mm
B. HT grade of thickness exceeding 45 mm
C. HT grade of thickness not exceeding 45 mm
D. All the above
Answer : D
7. 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
Answer : C
A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : C
8. 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 = K/v2
B. v = K/P2
C. P = Kv2
D. P = Kv
Answer : C
A. P = K/v2
B. v = K/P2
C. P = Kv2
D. P = Kv
Answer : C
9. 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. 2
B. 4
C. 6
D. 8
Answer : D
A. 2
B. 4
C. 6
D. 8
Answer : D
10. 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
Answer : C
A. Linear
B. Parabolic
C. Constant moment for all curvatures
D. Constant curvature for all moments
Answer : C
11. The forces acting on the web splice of a plate girder are
A. Axial forces
B. Shear and axial forces
C. Shear and bending forces
D. Axial and bending forces
Answer : C
A. Axial forces
B. Shear and axial forces
C. Shear and bending forces
D. Axial and bending forces
Answer : C
12. 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 = 0.75 span
D. L = 0.7 span
Answer : B
A. L = span
B. L = 0.85 span
C. L = 0.75 span
D. L = 0.7 span
Answer : B
13. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
A. 120 mm
B. 160 mm
C. 200 mm
D. 300 mm
Answer : B
A. 120 mm
B. 160 mm
C. 200 mm
D. 300 mm
Answer : B
14. Pick up the correct statement from the following:
A. The steel beams placed in plain cement concrete, are known as reinforced beams
B. The filler joists are generally continuous over three-supports only
C. Continuous fillers are connected to main beams by means of cleat angles
D. Continuous fillers are supported by main steel beams
Answer : D
A. The steel beams placed in plain cement concrete, are known as reinforced beams
B. The filler joists are generally continuous over three-supports only
C. Continuous fillers are connected to main beams by means of cleat angles
D. Continuous fillers are supported by main steel beams
Answer : D
15. The average shear stress for rolled steel beam section, is
A. 845 kg/cm2
B. 945 kg/cm2
C. 1025 kg/cm2
D. 1500 kg/cm2
Answer : B
A. 845 kg/cm2
B. 945 kg/cm2
C. 1025 kg/cm2
D. 1500 kg/cm2
Answer : B
16. 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
Answer : B
A. Gross diameter of bolt
B. Nominal diameter + 1.5 mm
C. Nominal diameter + 2.0 mm
D. Nominal diameter of bolt
Answer : B
17. 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 these
Answer : C
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 these
Answer : C
18. In factory buildings, the horizontal beams spanning between the wall columns supporting a wall covering, are called
A. Stringers
B. Trimmers
C. Girts
D. Lintels
Answer : C
A. Stringers
B. Trimmers
C. Girts
D. Lintels
Answer : C
19. 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
Answer : D
A. 32 kg/mm2
B. 36 kg/mm2
C. 40 kg/mm2
D. 44 kg/mm2
Answer : D
20. The elastic strain for steel is about
A. 1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
B. 1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
C. 1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
D. 1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain
Answer : C
A. 1/12 of strain at the initiation of strain hardening and about 1/120 of maximum strain
B. 1/2 of strain at the initiation of strain hardening and about 1/12 of maximum strain
C. 1/12 of strain at the initiation of strain hardening and 1/200 of maximum strain
D. 1/24 of strain at the initiation of strain hardening and about 1/200 of maximum strain
Answer : C
21. The gross diameter of a rivet is the diameter of
A. Cold rivet before driving
B. Rivet after driving
C. Rivet hole
D. None of these
Answer : B
A. Cold rivet before driving
B. Rivet after driving
C. Rivet hole
D. None of these
Answer : B
22. Bulb angles are used in
A. Column building
B. Bridge building
C. Ship building
D. Water tank building
Answer : C
A. Column building
B. Bridge building
C. Ship building
D. Water tank building
Answer : C
23. As per IS : 800, for compression flange, the outstand of flange plates should not exceed
A. 12 t
B. 16 t
C. 20 t
D. 25 t Where t = thickness of thinnest flange plate
Answer : B
A. 12 t
B. 16 t
C. 20 t
D. 25 t Where t = thickness of thinnest flange plate
Answer : B
24. Steel tanks are mainly designed for
A. Weight of tank
B. Wind pressure
C. Water pressure
D. Earthquake forces
Answer : C
A. Weight of tank
B. Wind pressure
C. Water pressure
D. Earthquake forces
Answer : C
25. In case of timber structures, the form factor for solid circular crosssection is taken as
A. 1.18
B. 1.414
C. 1.67
D. 1.81
Answer : A
A. 1.18
B. 1.414
C. 1.67
D. 1.81
Answer : A
26. Secant formula for direct stress in compression, is applicable only for slenderness ratio upto
A. 120
B. 130
C. 140
D. 150
Answer : C
A. 120
B. 130
C. 140
D. 150
Answer : C
27. 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. 2 t
B. 4 t
C. 6 t
D. 8 t
Answer : B
A. 2 t
B. 4 t
C. 6 t
D. 8 t
Answer : B
28. The most economical section for a column, is
A. Rectangular
B. Solid round
C. Flat strip
D. Tubular section
Answer : D
A. Rectangular
B. Solid round
C. Flat strip
D. Tubular section
Answer : D
29. In rolled steel beams, shear force is mostly resisted by
A. Web only
B. Flanges only
C. Web and flanges together
D. None of these
Answer : A
A. Web only
B. Flanges only
C. Web and flanges together
D. None of these
Answer : A
30. The strength of ISA 125 = 75 × 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
Answer : D
A. 26,000 kg
B. 26,025 kg
C. 26,050 kg
D. 26,075 kg
Answer : D
31. 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).
A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : B
A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : B
32. For a column of height L fixed in position and direction both at its top and bottom, its effective length, is
A. L
B. 1/?2 × L
C. ½ L
D. 2L
Answer : C
A. L
B. 1/?2 × L
C. ½ L
D. 2L
Answer : C
33. 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
Answer : A
A. More
B. Less
C. Equal
D. None of the above
Answer : A
34. Minimum pitch provided in riveted steel tanks is
A. 1.5 d
B. 2.0 d
C. 2.5 d
D. 3.0 d Where d is diameter of rivets
Answer : D
A. 1.5 d
B. 2.0 d
C. 2.5 d
D. 3.0 d Where d is diameter of rivets
Answer : D
35. In a built up section carrying a tensile force, the flanges of two channels are turned outward
A. To simplify the transverse connections
B. To minimise lacing
C. To have greater lateral rigidity
D. All the above
Answer : C
A. To simplify the transverse connections
B. To minimise lacing
C. To have greater lateral rigidity
D. All the above
Answer : C
36. 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
A. 0
B. 0.5
C. Between 0.5 and 1.0
D. 1.0
Answer : C
A. 0
B. 0.5
C. Between 0.5 and 1.0
D. 1.0
Answer : C
37. 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
Answer : A
A. 1/325 of the span
B. 1/350 of the span
C. 1/375 of the span
D. 1/400 of the span
Answer : A
38. The cross-section of a standard fillet is a triangle whose base angles are
A. 45° and 45°
B. 30° and 60°
C. 40° and 50°
D. 20° and 70°
Answer : A
A. 45° and 45°
B. 30° and 60°
C. 40° and 50°
D. 20° and 70°
Answer : A
39. According to IS Specifications, the maximum pitch of rivets in compression is
A. Lesser of 200 mm and 12 t
B. Lesser of 200 mm and 16 t
C. Lesser of 300 mm and 32 t
D. Lesser of 3 00 mm and 24 t Where t is thickness of thinnest outside plate or angle
Answer : A
A. Lesser of 200 mm and 12 t
B. Lesser of 200 mm and 16 t
C. Lesser of 300 mm and 32 t
D. Lesser of 3 00 mm and 24 t Where t is thickness of thinnest outside plate or angle
Answer : A
40. The channels get twisted symmetrically with regard to its axis
A. Parallel to flanges
B. Parallel to web
C. Perpendicular to flanges
D. Perpendicular to web
Answer : B
A. Parallel to flanges
B. Parallel to web
C. Perpendicular to flanges
D. Perpendicular to web
Answer : B
41. A tension member, if subjected to possible reversal of stress due to wind, the slenderness ratio of the member should not exceed
A. 180
B. 200
C. 300
D. 350
Answer : D
A. 180
B. 200
C. 300
D. 350
Answer : D
42. When the ratio of the moment M to axial load P is greater than L/6, the resultant of the compressive bearing pressure which acts at a distance Y from one side, is given by
A. y = (L/3) - (M/P)
B. y = (L/2) - (P/M)
C. y = (L/2) + (M/P)
D. y = (L/3) + (M/P)
Answer : B
A. y = (L/3) - (M/P)
B. y = (L/2) - (P/M)
C. y = (L/2) + (M/P)
D. y = (L/3) + (M/P)
Answer : B
43. Long column is one
A. Which is more than 3 m long
B. Whose lateral dimension is less than 25 cm
C. Which is free at its top
D. Which has a ratio of effective length and least lateral dimension more than 15
Answer : D
A. Which is more than 3 m long
B. Whose lateral dimension is less than 25 cm
C. Which is free at its top
D. Which has a ratio of effective length and least lateral dimension more than 15
Answer : D
44. Generally the purlins are placed at the panel points so as to avoid
A. Axial force in rafer
B. Shear force in rafter
C. Deflection of rafter
D. Bending moment in rafter
Answer : D
A. Axial force in rafer
B. Shear force in rafter
C. Deflection of rafter
D. Bending moment in rafter
Answer : D
45. An axial loaded column is supported on a slab base whose projection is 8 cm. If the intensity of pressure from concrete is 40 kg/cm2 and allowable bending stress in slab base is 1890 kg/cm2, the thickness (t) of the slab base, is
A. t = ?(21/64)
B. t = ?(64/21)
C. t = 21/64
D. t = 64/21
Answer : B
A. t = ?(21/64)
B. t = ?(64/21)
C. t = 21/64
D. t = 64/21
Answer : B
46. 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. Gauge distance of rivet
C. Staggered pitch
D. All the above
Answer : C
A. Pitch of rivet
B. Gauge distance of rivet
C. Staggered pitch
D. All the above
Answer : C
47. 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 the above
Answer : D
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 the above
Answer : D
48. If the depth of two column sections is equal, then the column splice is provided
A. With filler plates
B. With bearing plates
C. With filler and hearing plates
D. None of these
Answer : D
A. With filler plates
B. With bearing plates
C. With filler and hearing plates
D. None of these
Answer : D
49. A butt weld is specified by
A. Effective throat thickness
B. Plate thickness
C. Size of weld
D. Penetration thickness
Answer : A
A. Effective throat thickness
B. Plate thickness
C. Size of weld
D. Penetration thickness
Answer : A
50. A simply supported beam carrying a central load, will be safe in deflection if the ratio of its span to depth, is
A. < 19
B. < 24
C. > 19
D. > 24
Answer : B
A. < 19
B. < 24
C. > 19
D. > 24
Answer : B