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Machine Design

Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.2
0.6
0.25
0.5

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Machine Design
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

70 to 83%
80 to 90%
63 to 70%
45 to 60%

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Machine Design
The included angle for the British Association thread is

55°
29°
47.3°
60°

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Machine Design
Rankine's theory of failure is applicable for following type of materials

Plastic
Elastic
Ductile
Brittle

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Machine Design
Aircraft body is usually fabricated by

Pre-casting
Casting
Riveting
Welding

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Machine Design
The included angle for the V-belt is usually

10°-20°
30°-40°
40°-60°
60°-80°

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