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Machine Design

Machine Design
According to Indian standards, total numbers of fundamental deviations are

25
15
20
10

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Machine Design
Gear box is used

For speed reduction
To obtain variable speeds
To produce torque
To increase efficiency of system

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

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

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Machine Design
The included angle for the British standard whitworth thread is

47.5°
60°
29°
55°

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Machine Design
Stress concentration factor is defined as the ratio of

Nominal stress to the endurance limit
Nominal stress to the maximum stress
Maximum stress to the endurance limit
Maximum stress to the nominal stress

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Machine Design
In the levers of __________ type, the mechanical advantage is less than one.

Third
Second
First
None of these

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