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Machine Design

Machine Design
The pitch of threads on a Jock nut in comparison to pitch of nut is

Very fine
Finer
Same
Coarser

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Machine Design
The bending stress in a curved beam is

Zero at the centroidal axis
Zero at the point other than centroidal axis
None of these
Maximum at the neutral axis

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Machine Design
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

Sum of the initial tension and external load applied
External load applied
Initial tension
Initial tension or external load, whichever is greater

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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

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

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Machine Design
The included angle for the British standard whitworth thread is

55°
60°
29°
47.5°

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Machine Design
In most machine members, the damping capacity of the material should be

Could be anything
Low
High
Zero

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