design of steel structures MCQs – Page 3

Practise focused design of steel structures questions with marked answers for exam preparation and subject revision.

design of steel structures Mcqs
41. The bracing between two columns of a steel tank will be designed to resist_________________?
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A. column loads + full horizontal shear due to wind or earthquake

B. horizontal shear due to wind or earthquake only

C. horizontal, shear due to wind or earthquake + 2.5% of column loads

D. column loads + 2.5% of horizontal shear due to wind or earthquake

42. The least dimension in case of a circular column of diameter D is taken as_______________?
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A. 0.5 D

B. 0.88 D

C. 0.68 D

D. D

43. Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between____________________?
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A. 10 to 30

B. 40 to 70

C. 90

D. 30 to 40

44. The number of seismic zones in which the country has been divided are_________________?
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A. 6

B. 5

C. 3

D. 7

45. For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
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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. both (B) or (C)

46. The risk coefficient k, depends on__________________?
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A. mean probable design life of structures

B. basic wind speed

C. both (A) and (B)

D. none of the above

47. As per IS : 800, for compression flange, the outstand of flange plates should not exceed________________?
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A. 201

B. 121

C. 251

D. 161
48. The effect of racking forces is considered in the design of_________________?
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A. lateral braces

B. correct answer is</strong>

C. chord members

49. The sway bracing is designed to transfer____________________?
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A. 25% of the top panel wind load to bottom bracing

B. 2Vi % of the top panel wind load to bottom bracing

C. 50% of the top panel wind load to bottom bracing

D. 10% of the top panel wind load to bottom bracing

50. Shear buckling of web in a plate girder is prevented by using________________?
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A. none of the above

B. vertical intermediate stiffener

C. horizontal stiffener at neutral axis

D. bearing stiffener

51. Hudsons formula gives the dead weight of a truss bridge as a function of_________________?
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A. heaviest axle load of engine

B. top chord area

C. bottom chord area

D. effective span of bridge

52. The effective length of a battened column is increased by_________________?
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A. 5%

B. 10%

C. 15%

D. 20%

53. In case of timber structures, the simple bending formula M = fz may be applied for________________?
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A. solid circular beams only

B. all rectangular beams

C. all square cross-section beams

D. rectangular beams up to 300 mm depth
54. The range of economical spacing of trusses varies from________________?
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A. L/3 to L/5

B. 2L/5 to 3L/5 where L is span

C. L/3 to L/2

D. L/4to2L/5

55. As per IS:800, in the plastic design, which of the following pairs are correctly matched? Working Loads Load factor________________?
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A. ) Dead Load + imposed load 1.7

B. i) Dead load + load due to wind or 1.3 seismic forces

C. ) Dead load + imposed load + load 1.7</strong>

D. Dead load 1.7
56. Which of the following sections should preferably be used at places where torsion occurs ?
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A. any of the above

B. angle section

C. channel section

D. box type section
57. Generally the purlins are placed at the panel points so as to avoid__________________?
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A. bending moment in rafter

B. shear force in rafter

C. axial force in rafter

D. deflection of rafter

58. Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is______________?
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A. 10 mm

B. 5 mm

C. 8 mm

D. 6 mm
59. A steel beam supporting loads from the floor slab as well as from wall is termed as________________?
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A. stringer beam

B. header beam

C. spandrel beam

D. lintel beam

60. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which________________?
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A. is at the maximum distance from CG of the rivet group

B. gives the maximum angle between the two forces Fa and Fm

C. gives the minimum angle between the two forces Fa and Fm

D. is at the minimum distance from CG of the rivet group