Design of Steel Structures

51. Design of a riveted joint, is based on the assumption:

1. Load is uniformly distributed among all the rivets
2. Shear stress on a rivet is uniformly distributed over its gross area
3. Bearing stress in the rivet is neglected
4. All the above

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52. Diameter of a bolt hole is usually taken as

1. Gross diameter of bolt
2. Nominal diameter + 1.5 mm
3. Nominal diameter + 2.0 mm
4. Nominal diameter of bolt

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53. Diameter of a rivet hole is made larger than the diameter of the rivet by

1. 1.0 mm for rivet diameter upto 12 mm
2. 1.5 mm for rivet diameter exceeding 25 mm
3. 2.0 mm for rivet diameter over 25 mm
4. None of these

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54. Economical depth of a plate girder corresponds to

1. Minimum weight
2. Minimum depth
3. Maximum weight
4. Minimum thickness of web

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55. Effective length of a column effectively held in position and restrained in direction at both ends, is

1. L
2. 0.67 L
3. 0.85 L
4. 1.5 L

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56. Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is

1. 1.5 L
2. 0.67 L
3. 0.85 L
4. 2 L

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57. Effective length of a column effectively held in position at both ends and restrained in direction at one end, is

1. L
2. 0.67 L
3. 0.85 L
4. 1.5 L

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58. Effective sectional area of a compression member is:

1. Gross sectional area - area of rivet hole
2. Gross sectional area + area of rivet hole
3. Gross sectional area × area of rivet hole
4. Gross sectional area + area of rivet hole

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59. Efficiency of a riveted joint is defined as the ratio of

1. Least strength of a riveted joint to the strength of solid plate
2. Greatest strength of a riveted joint to the strength of solid plate
3. Least strength of a riveted plate to the greatest strength of the riveted joint
4. All the above

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60. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is

1. 40 %
2. 50 %
3. 60 %
4. 70 %

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