Design of Steel Structures MCQ Solved Paper for CAT
Thursday 9th of March 2023
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1. 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
2. Normally, the angle of roof truss with asbestos sheets should not be less than
A. 26 ½°
B. 30°
C. 35°
D. 40°
Answer : B
A. 26 ½°
B. 30°
C. 35°
D. 40°
Answer : B
3. Rolled steel angle sections are classified as
A. Equal angles
B. Unequal angles
C. Bulb angles
D. All the above
Answer : D
A. Equal angles
B. Unequal angles
C. Bulb angles
D. All the above
Answer : D
4. 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
5. With a percentage increase of carbon in steel, decreases its
A. Strength
B. Hardness
C. Brittleness
D. Ductility
Answer : D
A. Strength
B. Hardness
C. Brittleness
D. Ductility
Answer : D
6. 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).
A. fbc = (M/Ixx) × y?
B. fbc = (Ixx/M) × y?
C. fbc = (Ixx/M) + y?
D. fbc = (M/Ixx) + y?
Answer : A
A. fbc = (M/Ixx) × y?
B. fbc = (Ixx/M) × y?
C. fbc = (Ixx/M) + y?
D. fbc = (M/Ixx) + y?
Answer : A
7. 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
8. The critical stress on a column for elastic buckling given by Euler's formula, is
A. fc = ?²E/(I/r)²
B. fc = (I/r)²/ ?E
C. fc = (I/r)/ ?E
D. fc = ?²E/(I/r)
Answer : A
A. fc = ?²E/(I/r)²
B. fc = (I/r)²/ ?E
C. fc = (I/r)/ ?E
D. fc = ?²E/(I/r)
Answer : A
9. 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
10. 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
Answer : B
A. 8 t
B. 16 t
C. 24 t
D. 32 t
Answer : B
11. The distance between the outer faces of flanges of a plate girder, is known as
A. Overall depth
B. Clear depth
C. Effective depth
D. None of these
Answer : A
A. Overall depth
B. Clear depth
C. Effective depth
D. None of these
Answer : A
12. 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. 10 tonnes
B. 12 tonnes
C. 15 tonnes
D. 18 tonnes
Answer : C
A. 10 tonnes
B. 12 tonnes
C. 15 tonnes
D. 18 tonnes
Answer : C
13. 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
14. The least dimension in case of a circular column of diameter D is taken as
A. 0.5 D
B. 0.68 D
C. 0.88 D
D. D
Answer : C
A. 0.5 D
B. 0.68 D
C. 0.88 D
D. D
Answer : C
15. 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. 60
B. 70
C. 80
D. 100
Answer : C
A. 60
B. 70
C. 80
D. 100
Answer : C
16. The slenderness ratio of a column supported throughout its length by a masonry wall is
A. Zero
B. 10
C. 100
D. Infinity
Answer : A
A. Zero
B. 10
C. 100
D. Infinity
Answer : A
17. The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is
A. 150
B. 180
C. 250
D. 350
Answer : C
A. 150
B. 180
C. 250
D. 350
Answer : C
18. In a grillage footing, the maximum shear force occurs at the
A. Edge of grillage beam
B. Centre of base plate
C. Centre of grillage beam
D. Centre of base plate
Answer : B
A. Edge of grillage beam
B. Centre of base plate
C. Centre of grillage beam
D. Centre of base plate
Answer : B
19. 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. (D²/250) × (R/W)
B. (D3T/250) × (R/W)
C. (DT/250) × (R/W)
D. (DT/250) × (W/R)
Answer : B
A. (D²/250) × (R/W)
B. (D3T/250) × (R/W)
C. (DT/250) × (R/W)
D. (DT/250) × (W/R)
Answer : B
20. 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
21. The rolled steel I-sections are most commonly used as beams because these provide
A. Large moment of inertia with less cross-sectional area
B. Large moment of resistance as compared to other section
C. Greater lateral stability
D. All the above
Answer : D
A. Large moment of inertia with less cross-sectional area
B. Large moment of resistance as compared to other section
C. Greater lateral stability
D. All the above
Answer : D
22. In plastic analysis, the shape factor for circular sections, is
A. 1.5
B. 1.6
C. 1.697
D. None of these
Answer : C
A. 1.5
B. 1.6
C. 1.697
D. None of these
Answer : C
23. 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
24. In a fillet weld placed on the sides of the base, the metal experiences
A. Shear
B. Tension
C. Compression
D. All the above
Answer : D
A. Shear
B. Tension
C. Compression
D. All the above
Answer : D
25. 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
26. The risk coefficient k, depends on
A. Mean probable design life of structures
B. Basic wind speed
C. Both (A) and (B)
D. None of the above
Answer : C
A. Mean probable design life of structures
B. Basic wind speed
C. Both (A) and (B)
D. None of the above
Answer : C
27. The greatest gauge of long rivets should not exceed (where d is the diameter of the holes).
A. 2 d
B. 4 d
C. 6 d
D. 8 d
Answer : D
A. 2 d
B. 4 d
C. 6 d
D. 8 d
Answer : D
28. 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 these
Answer : A
A. Length of the column
B. Strength of the column
C. Cross-sectional area of the column
D. None of these
Answer : A
29. A structural member subjected to compressive stress in a direction parallel to its longitudinal axis, is generally known as
A. Column
B. Stanchion
C. Post
D. All the above
Answer : D
A. Column
B. Stanchion
C. Post
D. All the above
Answer : D
30. The mechanism method of plastic analysis satisfies
A. Equilibrium and mechanism conditions
B. Equilibrium and plastic moment conditions
C. Mechanism and plastic moment conditions
D. Equilibrium condition only
Answer : A
A. Equilibrium and mechanism conditions
B. Equilibrium and plastic moment conditions
C. Mechanism and plastic moment conditions
D. Equilibrium condition only
Answer : A
31. 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
32. The distance between e.g. of compression and e.g. of tension flanges of a plate girder, is known as
A. Overall depth
B. Clear depth
C. Effective depth
D. None of these
Answer : C
A. Overall depth
B. Clear depth
C. Effective depth
D. None of these
Answer : C
33. 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
34. 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
35. 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
Answer : D
A. 1.5
B. 1.7
C. 2.0
D. 2.34
Answer : D
36. The maximum axial load which is just sufficient to keep a column in a small deflected shape, is called
A. Crippling load
B. Buckling load
C. Critical load
D. All the above
Answer : D
A. Crippling load
B. Buckling load
C. Critical load
D. All the above
Answer : D
37. Cold driven rivets range from
A. 6 to 10 mm in diameter
B. 10 to 16 mm in diameter
C. 12 to 22 mm in diameter
D. 22 to 32 mm in diameter
Answer : C
A. 6 to 10 mm in diameter
B. 10 to 16 mm in diameter
C. 12 to 22 mm in diameter
D. 22 to 32 mm in diameter
Answer : C
38. 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
39. The effective length of a compression member of length L, 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
Answer : B
A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
Answer : B
40. As compared to field rivets, the shop rivets are
A. Stronger
B. Weaker
C. Equally strong
D. Any of the above
Answer : A
A. Stronger
B. Weaker
C. Equally strong
D. Any of the above
Answer : A
41. 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
42. To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added, is
A. 10 %
B. 13 %
C. 15 %
D. 18 %
Answer : B
A. 10 %
B. 13 %
C. 15 %
D. 18 %
Answer : B
43. 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
Answr : C
A. Deck type
B. Through type
C. Half through type
D. Double deck type
Answr : C
44. 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
45. Rolled steel Tee-sections are used
A. As columns
B. With flat strips to connect plates in steel rectangular tanks
C. As built up sections to resist axial tension
D. None of these
Answer : B
A. As columns
B. With flat strips to connect plates in steel rectangular tanks
C. As built up sections to resist axial tension
D. None of these
Answer : B
46. For a rectangular section, the ratio of the maximum and average shear stresses, is
A. 1.5
B. 2.0
C. 2.5
D. 3.5
Answer : A
A. 1.5
B. 2.0
C. 2.5
D. 3.5
Answer : A
47. 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
48. 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
49. 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
B. 1.5 cm
C. 2 cm
D. 2.5 cm
Answer : C
A. 1 cm
B. 1.5 cm
C. 2 cm
D. 2.5 cm
Answer : C
50. In case of plastic design, the calculated maximum shear capacity of a beam as per IS: 800 shall be
A. 0.55 Aw.fy
B. 0.65 Aw.fy
C. 0.75 Aw.fy
D. 0.85 Aw.fy Where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel
Answer : A
A. 0.55 Aw.fy
B. 0.65 Aw.fy
C. 0.75 Aw.fy
D. 0.85 Aw.fy Where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel
Answer : A
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