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Machine Design

Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

25°
8°
5°
15°

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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

0.6 times
0.4 times
0.7 times
0.8 times

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Approaches yield point
Is just sufficient to hold parts together
Is 50% of yield point
Is about yield point divided by safety factor

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Machine Design
The shock absorbing capacity of a bolt may be increased by

Decreasing its shank diameter
Making the shank diameter equal to core diameter of thread
Increasing its shank diameter
Tightening the bolt properly

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Machine Design
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have

Right hand threads
Left hand threads
Multiple threads
Pointed threads

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force)

3 Pc
Pc/3
1 Pc
2 Pc

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