Design of Steel Structures

21. According to I.S. : 800 - 1871, lacing bars resist transverse shear equal to

  1. 1.0% of the axial load
  2. 2.0% of the axial load
  3. 2.5% of the axial load
  4. 3.0% of the axial load

Correct answer: (C)
2.5% of the axial load

22. According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than

  1. d/85
  2. d/200
  3. d/225
  4. d/250

Correct answer: (D)
d/250

23. According to IS : 800-1962 the permissible bending stress in steel slab plates, is

  1. 1500 kg/cm2
  2. 1420 kg/cm2
  3. 2125 kg/cm2
  4. 1890 kg/cm2

Correct answer: (D)
1890 kg/cm2

24. 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

  1. 0.67 L
  2. 0.8 L
  3. L
  4. 1.5 L

Correct answer: (B)
0.8 L

25. According to IS Specifications, the maximum pitch of rivets in compression is

  1. Lesser of 200 mm and 12 t
  2. Lesser of 200 mm and 16 t
  3. Lesser of 300 mm and 32 t
  4. Lesser of 3 00 mm and 24 t
    Where 't' is thickness of thinnest outside plate or angle

Correct answer: (A)
Lesser of 200 mm and 12 t

26. According to IS: 800, in the Merchant Rankine formula the value of imperfection index (n) is

  1. 1
  2. 1.4
  3. 1.8
  4. 2

Correct answer: (B)
1.4

27. According to IS: 800-1962, the coefficient of expansion of steel per degree centigrade per unit length, is taken as

  1. 0.000008
  2. 0.00001
  3. 0.000012
  4. 0.000014

Correct answer: (C)
0.000012

28. According to the Unwin's formula, if 't' is thickness of the plate in mm, the nominal diameter of the rivet, is

  1. d = 1.91 t
  2. d = 1.91 t2
  3. d = 1.91 t
  4. d = 1.91 ∛t

Correct answer: (C)
d = 1.91 t

29. 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

  1. 0.5
  2. 0.6
  3. 0.7
  4. 0.8

Correct answer: (D)
0.8

30. 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

  1. t=√(21/64)
  2. t=√(64/21)
  3. t = 21/64
  4. t = 64/21

Correct answer: (B)
t=√(64/21)

Previous
Page 3 of 32
Next
Copyright © EngineeringMCQ.com