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Machine Design

Machine Design
In a marine flange coupling, the thickness of flange is taken as

3d/4
d/2
d/4
d/3

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

None of these
More than 50%
Less than 50%
Equal to 50%

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Machine Design
The objective of idler pulley in belt drive is to

Decrease the tendency of belt to slip
All the above objectives
Increase the power transmission capacity
Increase the wrap angle and belt tension

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Machine Design
A locking device extensively used in automobile industry is a

Castle nut
Sawn nut
Jam nut
Ring nut

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Machine Design
A bench vice has following type of threads

Metric
Acme
Square
Buttress

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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
0.5
0.25
0.6

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