Design of Steel Structures MCQs with answers Page - 18

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Q. 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

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Q. For steel members not exposed to weather, the thickness of steel should not be less than

  • (A) 4.5 mm
  • (B) 6 mm
  • (C) 8 mm
  • (D) 10 mm

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Q. When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from

  • (A) Each web
  • (B) Each flange
  • (C) Each web or one hole from each flange whichever is more
  • (D) Each web or one hole from each flange whichever is less

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Q. If a pair of angles placed back to back in tension are connected by one leg of each angle, the net effective area of the section, is

  • (A) a - [b/{1 + 0.35 (b/a)}]
  • (B) a + [b/{1 + 0.35 (b/a)}]
  • (C) a - [b/{1 + 0.2 (b/a)}]
  • (D) a + [b/{1 + 0.2 (b/a)}]

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Q. Secant formula for direct stress in compression, is applicable only for slenderness ratio upto

  • (A) 120
  • (B) 130
  • (C) 140
  • (D) 150

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Q. 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
  • (B) t
  • (C) t = 21/64
  • (D) t = 64/21

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Q. The bracing provided in the plane of end posts is called

  • (A) sway bracing
  • (B) portal bracing
  • (C) top lateral bracing
  • (D) bottom lateral bracing

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Q. 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

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Q. 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

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Q. The statical 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

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