Design of Steel Structures

61. Factor of safety is the ratio of

  1. Yield stress to working stress
  2. Tensile stress to working stress
  3. Compressive stress to working stress
  4. Bearing stress to working stress

Correct answer: (A)
Yield stress to working stress

62. For a cantilever beam of length 'L' built-in at the support and restrained against torsion at the free end, the effective projecting length '1' is

  1. l = 0.7 L
  2. l = 0.75 L
  3. l = 0.85 L
  4. l = 0.5 L

Correct answer: (B)
l = 0.75 L

63. For a cantilever beam of length 'L' continuous at the support and unrestrained against torsion at the support and free at the end, the effective length '1' is equal to

  1. l = L
  2. l = 2L
  3. l = 0.5L
  4. l = 3L

Correct answer: (D)
l = 3L

64. For a column of height 'L' fixed in position and direction both at its top and bottom, its effective length, is

  1. L
  2. 1/√2xL
  3. ½ L
  4. 2L

Correct answer: (C)
½ L

65. For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?

  1. Equal angles back to back
  2. Unequal legged angles with long legs back to back
  3. Unequal legged angles with short legs back to back
  4. Both (B) and (C)

Correct answer: (B)
Unequal legged angles with long legs back to back

66. For a rectangular section, the ratio of the maximum and average shear stresses, is

  1. 1.5
  2. 2
  3. 2.5
  4. 3.5

Correct answer: (A)
1.5

67. For a single section used as a tension member, the given area is assumed

  1. 20% to 30% in excess of the net area
  2. 30% to 40% in excess of the net area
  3. 40% to 50% in excess of the net area
  4. 50% to 60% in excess of the net area

Correct answer: (C)
40% to 50% in excess of the net area

68. For a standard 45° fillet, the ratio of size of fillet to throat thickness is

  1. 1.1
  2. 1 :√2
  3. √2 : 1
  4. 2.1

Correct answer: (C)
√2 : 1

69. For a steel grillage footing to support two unequal column loads

  1. Line of action of the resultant of two column loads, is made to coincide with the centre of gravity of the base of the footing
  2. Trapezoidal shape is used for the base footing
  3. Projections of beams on either side in lower tier are such that bending moments under columns are equal
  4. All the above

Correct answer: (D)
All the above

70. For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is

  1. HTW grade of thickness exceeding 32 mm
  2. HT grade of thickness exceeding 45 mm
  3. HT grade of thickness not exceeding 45 mm
  4. All the above

Correct answer: (D)
All the above

Previous
Page 7 of 32
Next
Copyright © EngineeringMCQ.com