Design of Steel Structures MCQs with answers Page - 11

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Q. 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

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Q. The centrifugal force due to curvature of track is assumed to act on the bridge at a height of

  • (A) 1.23 m above the rail level
  • (B) 1.50 m above the rail level
  • (C) 1.83 m above the rail level
  • (D) 2.13 m above the rail level

A

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Q. 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

A

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Q. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is

  • (A) 40 %
  • (B) 50 %
  • (C) 60 %
  • (D) 70 %

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Q. In double lacing, the thickness t of flat lacing is

  • (A) t < 1/40 th length between inner end rivets
  • (B) t < 1/50 th length between inner end rivets
  • (C) t < 1/60 th length between inner end rivets
  • (D) t < 1/70 th length between inner end rivets

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Q. 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

  • (A) 0.67 l
  • (B) 0.8 l
  • (C) l
  • (D) 1.5 l

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Q. 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

  • (A) t b × p)/6m]
  • (B) t m/(b × p)]
  • (C) t = 6m/bp
  • (D) t m/(b × p)

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Q. The web crippling due to excessive bearing stress can be avoided by

  • (A) increasing the web thickness
  • (B) providing suitable stiffeners
  • (C) increasing the length of the bearing plates
  • (D) none of the above

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Q. 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

  • (A) 50 %
  • (B) 60 %
  • (C) 70 %
  • (D) 80 %

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Q. The number of seismic zones in which the country has been divided is

  • (A) 3
  • (B) 5
  • (C) 6
  • (D) 7