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Machine Design

Machine Design
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

d/6
d/2
d/8
d/4

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Machine Design
Failure of a material is called fatigue when it fails

Below the yield point
Below the elastic limit
At the elastic limit
At the yield point

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Machine Design
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

Middle
Head
Shank
Thread

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Machine Design
In leaf springs, the longest leaf is known as

Master leaf
Lower leaf
None of these
Upper leaf

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Machine Design
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads

Compression
Combined loads
Tension
Shear

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Machine Design
The function of the washer is to

Absorb shocks and vibrations
Provide bearing area
Fill up the axial gap
Provide cushioning effect

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