1000+ Design of Steel Structures Multiple Choice Question Answer [Solved]
Thursday 9th of March 2023
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1. Under a concentrated load, bearing stress fb in a beam is given by (where b is the length of the bearing plate and h is the depth of the root of the fillet).
A. fb = W/(b + h?3)tw
B. fb = W/(b + 2h?3)tw
C. fb = W/(b + 2h?2)tw
D. fb = W/(b + h?2)tw
Answer : B
A. fb = W/(b + h?3)tw
B. fb = W/(b + 2h?3)tw
C. fb = W/(b + 2h?2)tw
D. fb = W/(b + h?2)tw
Answer : B
2. Design of a riveted joint is based on the assumption:
A. Bending stress in rivets is accounted for
B. Riveted hole is assumed to be completely filled by the rivet
C. Stress in the plate in not uniform
D. Friction between plates is taken into account
Answer : B
A. Bending stress in rivets is accounted for
B. Riveted hole is assumed to be completely filled by the rivet
C. Stress in the plate in not uniform
D. Friction between plates is taken into account
Answer : B
3. The permissible bearing stress in steel, is
A. 1500 kg/cm2
B. 1890 kg/cm2
C. 2025 kg/cm2
D. 2340 kg/cm2
Answer : B
A. 1500 kg/cm2
B. 1890 kg/cm2
C. 2025 kg/cm2
D. 2340 kg/cm2
Answer : B
4. 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
5. 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
6. 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
A. (A/L) + (3Ad/L²)
B. (A/L) + (6Ad/L²)
C. (A/L) - (6Ad/L²)
D. (A/L) - (3Ad/L²)
Answer : B
A. (A/L) + (3Ad/L²)
B. (A/L) + (6Ad/L²)
C. (A/L) - (6Ad/L²)
D. (A/L) - (3Ad/L²)
Answer : B
7. 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
A. 6
B. 7
C. 8
D. 9
Answer : C
A. 6
B. 7
C. 8
D. 9
Answer : C
8. 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
9. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
A. Black bolt
B. Ordinary unfinished bolt
C. Turned and fitted bolt
D. High strength bolt
Answer : D
A. Black bolt
B. Ordinary unfinished bolt
C. Turned and fitted bolt
D. High strength bolt
Answer : D
10. The diameter of base of conical flare of a steel stack is
A. Less than d
B. Equal to d
C. More than d
D. Any of the above Where d is the diameter of the cylindrical part
Answer : C
A. Less than d
B. Equal to d
C. More than d
D. Any of the above Where d is the diameter of the cylindrical part
Answer : C
11. The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is
A. d = ?(M/fb)
B. d = 1.5 ?(M/fb)
C. d = 2.5 ?(M/fb)
D. d = 4.5 ?(M/fb)
Answer : D
A. d = ?(M/fb)
B. d = 1.5 ?(M/fb)
C. d = 2.5 ?(M/fb)
D. d = 4.5 ?(M/fb)
Answer : D
12. Rolled steel beams are:
A. Mainly used to resist bending stress
B. Used as independent sections to resist compressive stress
C. Used as independent sections to resist tensile stress
D. All the above
Answer : D
A. Mainly used to resist bending stress
B. Used as independent sections to resist compressive stress
C. Used as independent sections to resist tensile stress
D. All the above
Answer : D
13. 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
14. 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
15. The thickness t of a single flat lacing should not be less than
A. 1/30th length between inner end rivets
B. 1/40th length between inner end rivets
C. 1/50th length between inner end rivets
D. 1/60th length between inner end rivets
Answer : B
A. 1/30th length between inner end rivets
B. 1/40th length between inner end rivets
C. 1/50th length between inner end rivets
D. 1/60th length between inner end rivets
Answer : B
16. For a single section used as a tension member, the given area is assumed
A. 20% to 30% in excess of the net area
B. 30% to 40% in excess of the net area
C. 40% to 50% in excess of the net area
D. 50% to 60% in excess of the net area
Answer : C
A. 20% to 30% in excess of the net area
B. 30% to 40% in excess of the net area
C. 40% to 50% in excess of the net area
D. 50% to 60% in excess of the net area
Answer : C
17. For a standard 45° fillet, the ratio of size of fillet to throat thickness is
A. 1 : 1
B. 1 : ?2
C. ?2 : 1
D. 2 : 1
Answer : C
A. 1 : 1
B. 1 : ?2
C. ?2 : 1
D. 2 : 1
Answer : C
18. As per IS : 875, for the purposes of specifying basic wind velocity, the country has been divided into
A. 4 zones
B. 5 zones
C. 6 zones
D. 7 zones
Answer : C
A. 4 zones
B. 5 zones
C. 6 zones
D. 7 zones
Answer : C
19. Pick up the correct statement from the following:
A. Loaded columns are supported on column bases
B. Column bases transmit the column load to the concrete foundation
C. Column load is spread over a large area on concrete
D. All the above
Answer : D
A. Loaded columns are supported on column bases
B. Column bases transmit the column load to the concrete foundation
C. Column load is spread over a large area on concrete
D. All the above
Answer : D
20. 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 these
Answer : /strong> B
A. One dimensional
B. Two dimensional
C. Three dimensional
D. None of these
Answer : /strong> B
21. The main type of butt joints, is a double cover
A. Shear riveted joint
B. Chain riveted joint
C. Zig-zag riveted joint
D. All the above
Answer : D
A. Shear riveted joint
B. Chain riveted joint
C. Zig-zag riveted joint
D. All the above
Answer : D
22. 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/fr²
B. A = My²/fr²
C. A = My/fr
D. A = My/f²r²
Answer : A
A. A = My/fr²
B. A = My²/fr²
C. A = My/fr
D. A = My/f²r²
Answer : A
23. The maximum permissible slenderness ratio of compression member carrying dead and superimposed load, is
A. 180
B. 200
C. 250
D. 350
Answer : A
A. 180
B. 200
C. 250
D. 350
Answer : A
24. The ratio of plastic section modulus to elastic section modulus
A. Is equal to 1
B. Is always less than 1
C. Is always greater than 1
D. Can be less than 1
Answer : C
A. Is equal to 1
B. Is always less than 1
C. Is always greater than 1
D. Can be less than 1
Answer : C
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. Deck type
B. Through type
C. Half through type
D. Double deck type
Answer : C
A. Deck type
B. Through type
C. Half through type
D. Double deck type
Answer : C
26. The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is upto a height of
A. The effective span
B. 1.25 times the effective span
C. 1.50 times the effective span
D. 2.0 times the effective span
Answer : B
A. The effective span
B. 1.25 times the effective span
C. 1.50 times the effective span
D. 2.0 times the effective span
Answer : B
27. 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
28. The maximum spacing of vertical stiffeners is
A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d Where d is the distance between flange angles
Answer : C
A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d Where d is the distance between flange angles
Answer : C
29. Horizontal stiffener in a plate girder is provided to safeguard against
A. Shear buckling of web plate
B. Compression buckling of web plate
C. Yielding
D. All of the above
Answer : B
A. Shear buckling of web plate
B. Compression buckling of web plate
C. Yielding
D. All of the above
Answer : B
30. 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. 45
B. 55
C. 62
D. 82
Answer : D
A. 45
B. 55
C. 62
D. 82
Answer : D
31. 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)
B. Only (iii)
C. (i) and (ii)
D. (ii) and (iii)
Answer : C
A. Only (i)
B. Only (iii)
C. (i) and (ii)
D. (ii) and (iii)
Answer : C
32. 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
B. < L/6
C. > L/3
D. > L/6
Answer : B
A. < L/3
B. < L/6
C. > L/3
D. > L/6
Answer : B
33. 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
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : A
A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : A
34. If fbt and fc are the co-existent bending tensile stress and shear stress in a member, the equivalent stress fc is
A. ?(fbt² + fc²)
B. ?(fbt² + ½fc²)
C. ?(fbt² + 3fc²)
D. ?(fbt² - 3fc²)
Answer : C
A. ?(fbt² + fc²)
B. ?(fbt² + ½fc²)
C. ?(fbt² + 3fc²)
D. ?(fbt² - 3fc²)
Answer : C
35. 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
Answer : C
A. Angle section
B. Channel section
C. Box type section
D. Any of the above
Answer : C
36. A riveted joint many experience
A. Tearing failure of plates
B. Splitting failure of plates at the edges
C. Bearing failure of rivets
D. All the above
Answer : D
A. Tearing failure of plates
B. Splitting failure of plates at the edges
C. Bearing failure of rivets
D. All the above
Answer : D
37. 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
38. Select the correct statement
A. Material cost of a rivet is higher than that of a bolt
B. Tensile strength of a bolt is lesser than that of a rivet
C. Bolts are used as a temporary fastening whereas rivets are used as permanent fastenings
D. Riveting is less noisy than bolting
Answer : C
A. Material cost of a rivet is higher than that of a bolt
B. Tensile strength of a bolt is lesser than that of a rivet
C. Bolts are used as a temporary fastening whereas rivets are used as permanent fastenings
D. Riveting is less noisy than bolting
Answer : C
39. 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
40. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is
A. 40 %
B. 50 %
C. 60 %
D. 70 %
Answer : C
A. 40 %
B. 50 %
C. 60 %
D. 70 %
Answer : C
41. The stress in the wall of a thin cylinder subjected to internal pressure, is
A. Hoop compression
B. Shear
C. Torsional shear
D. Hoop tension
Answer : D
A. Hoop compression
B. Shear
C. Torsional shear
D. Hoop tension
Answer : D
42. Number of rivets required in a joint, is
A. Load/Shear strength of a rivet
B. Load/Bearing strength of a rivet
C. Load/Tearing strength of a rivet
D. Load/Rivet value
Answer : D
A. Load/Shear strength of a rivet
B. Load/Bearing strength of a rivet
C. Load/Tearing strength of a rivet
D. Load/Rivet value
Answer : D
43. Effective sectional area of a compression member is:
A. Gross sectional area - area of rivet hole
B. Gross sectional area + area of rivet hole
C. Gross sectional area × area of rivet hole
D. Gross sectional area + area of rivet hole
Answer : A
A. Gross sectional area - area of rivet hole
B. Gross sectional area + area of rivet hole
C. Gross sectional area × area of rivet hole
D. Gross sectional area + area of rivet hole
Answer : A
44. 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
B. Is at the minimum distance from CG of the rivet group
C. Gives the maximum angle between the two forces Fa and Fm
D. Gives the minimum angle between the two forces Fa and Fm
Answer : D
A. Is at the maximum distance from CG of the rivet group
B. Is at the minimum distance from CG of the rivet group
C. Gives the maximum angle between the two forces Fa and Fm
D. Gives the minimum angle between the two forces Fa and Fm
Answer : D
45. 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 %
Answer : C
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : C
46. 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
47. Gantry girders are designed to resist
A. Lateral loads
B. Longitudinal loads and vertical loads
C. Lateral, longitudinal and vertical loads
D. Lateral and longitudinal loads
Answer : C
A. Lateral loads
B. Longitudinal loads and vertical loads
C. Lateral, longitudinal and vertical loads
D. Lateral and longitudinal loads
Answer : C
48. If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by
A. Ps = N × (?/4) d2 × Ps
B. Ps = N × (d × t × ps)
C. Ps = N × (p - d) × t × Ps
D. Ps = N × (P + d) × t × ps
Answer : A
A. Ps = N × (?/4) d2 × Ps
B. Ps = N × (d × t × ps)
C. Ps = N × (p - d) × t × Ps
D. Ps = N × (P + d) × t × ps
Answer : A
49. 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. 0.5 L
B. 0.67 L
C. 0.85 L
D. 2 L
Answer : C
A. 0.5 L
B. 0.67 L
C. 0.85 L
D. 2 L
Answer : C
50. 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
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