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MACHINE DESIGN

Machine Design
When spring index increases, the value of Wahl's stress factor

Remains same
Decreases linearly
Increases linearly
Increases exponentially

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Machine Design
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.

Double
Four times
Same
Three times

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Machine Design
The shear stress in a beam varies from zero at the outer fibers to a maximum at the________.

Upper surface
None of these
Lower surface
Neutral surface

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Machine Design
Three different weights fall from a certain height under vacuum. They will take

None of these
Times inversely proportional to weight to reach earth
Same time to reach earth
Times proportional to weight to reach earth

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Machine Design
Which of the following is a permanent fastening?

Cotters
Keys
Rivets
Bolts

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