Design of Steel Structures

151. Other conditions being same, the load factor in indeterminate structures is

  1. Equal to load factor in determinate structures
  2. More than the load factor in determinate structures
  3. Less than the load factor in determinate structures
  4. Unpredictable

Correct answer: (B)
More than the load factor in determinate structures

152. Outstanding length of a compression member consisting of a channel, is measured as

  1. Half of the nominal width
  2. Nominal width of the section
  3. From the edge to the first row of rivets
  4. None of these

Correct answer: (B)
Nominal width of the section

153. P E to be 25% of the computed value of P and E respectively, the minimum value of the factor of safety is

  1. 1
  2. 0.67
  3. 1.67
  4. 2.67

Correct answer: (C)
1.67

154. Perforated cover plates are particularly suitable for built up sections consisting of

  1. Channels placed back to back
  2. Channels placed toe to toe
  3. Four angle box section
  4. All the above

Correct answer: (C)
Four angle box section

155. Pick up the correct statement from the following:

  1. Dead load includes self-weight of the structure and super-imposed loads permanently attached to the structure
  2. Dead loads change their positions and vary in magnitude
  3. Dead loads are known in the beginning of the design
  4. None of these

Correct answer: (A)
Dead load includes self-weight of the structure and super-imposed loads permanently attached to the structure

156. Pick up the incorrect statement from the following:

  1. The nominal diameter of a rivet is its diameter before driving
  2. The gross diameter of a rivet is the diameter of rivet hole
  3. The gross area of a rivet is the cross-sectional area of the rivet hole
  4. The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

Correct answer: (D)
The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

157. Pitch of tacking rivets, when double angles connected back to back and acting as tension members should not be more than

  1. 500 mm
  2. 600 mm
  3. 1000 mm
  4. 300 mm

Correct answer: (C)
1000 mm

158. Poisson's ratio for steel within elastic limit, ranges from

  1. 0.15 to 0.20
  2. 0.25 to 0.24
  3. 0.25 to 0.33
  4. 0.33 to 0.35

Correct answer: (C)
0.25 to 0.33

159. Rise of a Jack arch is kept about

  1. 1/2 to 1/3 of the span
  2. 1/3 to 1/4 of the span
  3. 1/4 to 1/8 of the span
  4. 1/8 to 1/12 of the span

Correct answer: (D)
1/8 to 1/12 of the span

160. Rivets connecting flange angles to cover plates in a plate girder are subjected to

  1. Horizontal shear only
  2. Vertical load only
  3. Both (A) and (B)
  4. None of the above

Correct answer: (A)
Horizontal shear only

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