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Machine Design

Machine Design
The groove angle of the pulley for rope drive is usually

35°
20°
45°
60°

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Machine Design
The design of pin of a rocker arm of an I.C. engine is based on

All of these
Bearing failure
Bending failure
Shearing failure

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Machine Design
The acme threads are usually found on

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

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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

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

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Machine Design
A key way lowers

The rigidity of the shaft
The ductility of the shaft
Both the strength and rigidity of the shaft
The strength of the shaft

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Machine Design
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

1.8 d
1.2 d
1.57 d
0.8 d

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