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Machine Design

Machine Design
The standard length of the shaft is

All of these
5 m
7 m
6 m

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Machine Design
A shaft is subjected to

Shear stresses
Bending stresses
All of these
Combined bending and shear stresses

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.7 times
0.6 times
0.4 times
0.8 times

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

Coarser
Very fine
Finer
Same

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Machine Design
The contact ratio for gears is

Less than one
None of these
Greater than one
Zero

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Machine Design
Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

Combined static and dynamic loading
Static loading
Dynamic loading
Completely reversed loading

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