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Machine Design

Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.5
0.33
0.55
0.4

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Machine Design
The valve rod in a steam engine is connected to an eccentric rod by

Knuckle joint
Cotter joint
Universal coupling
Bolted joint

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Machine Design
The square threads are usually found on

Spindles of bench vices
Screw cutting lathes
Feed mechanism of machine tools
Railway carriage couplings

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Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Woodruff key
Flat saddle key
Feather key
Hollow saddle key

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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

0.8 times
0.4 times
0.7 times
0.6 times

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Machine Design
The power transmitted by the belt drive can be increased by

Increasing wrap angle by using idler pulley
Dressing the belt to increase the coefficient of friction
Increasing the initial tension in the belt
All of these

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