Design of Steel Structures

141. Minimum pitch of the rivets shall not be less than

  1. 1.5 d
  2. 2.0 d
  3. 2.5 d
  4. 3.0 d
    Where d is gross diameter of rivet

Correct answer: (C)
2.5 d

142. Minimum pitch provided in riveted steel tanks is

  1. 1.5 d
  2. 2.0 d
  3. 2.5 d
  4. 3.0 d
    Where d is diameter of rivets

Correct answer: (D)
3.0 d

143. Minimum spacing of vertical stiffeners is limited to

  1. d/4
  2. d/3
  3. d/2
  4. 2d/3
    Where d is the distance between flange angles

Correct answer: (B)
d/3

144. Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is

  1. 5 mm
  2. 6 mm
  3. 8 mm
  4. 10 mm

Correct answer: (B)
6 mm

145. Modified moment of inertia of sections with a single web, is equal to moment of inertia of the section about Y-Y axis at the point of maximum bending moment and is multiplied by the ratio of

  1. Area of compression flange at the minimum bending moment to the corresponding area at the point of maximum bending moment
  2. Area of tension flange at the minimum bending moment of the corresponding area at the point of maximum bending moment
  3. Total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment
  4. None of these

Correct answer: (C)
Total area of flanges at the maximum bending moment to the corresponding area at the point of maximum bending moment

146. Net sectional area of a tension member, is equal to its gross section area

  1. Plus the area of the rivet holes
  2. Divided by the area of rivet holes
  3. Multiplied by the area of the rivet holes
  4. None of these

Correct answer: (D)
None of these

147. Normally, the angle of roof truss with asbestos sheets should not be less than

  1. 26½°
  2. 30°
  3. 35°
  4. 40°

Correct answer: (B)
30°

148. Number of rivets required in a joint, is

  1. Load/Shear strength of a rivet
  2. Load/Bearing strength of a rivet
  3. Load/Tearing strength of a rivet
  4. Load/Rivet value

Correct answer: (D)
Load/Rivet value

149. On eccentrically loaded columns, the equivalent axial load may be obtained by

  1. Adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor
  2. Adding the axial load and eccentric load and subtracting the product of bending moment and appropriate bending factor
  3. Dividing the sum of axial load and eccentric load by the product of the bending moment and appropriate bending factor
  4. None of these

Correct answer: (A)
Adding the axial load, eccentric load, the product of the bending moment due to eccentric load and the appropriate bending factor

150. On steel structures the dead load is the weight of

  1. Steel work
  2. Material fastened to steel work
  3. Material supported permanently
  4. All the above

Correct answer: (D)
All the above

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