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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Plastic
Brittle
Elastic
Ductile

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Module
Normal pitch
Diametral pitch
Axial pitch

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Machine Design
A screw is said to be over hauling screw, if its efficiency is

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

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

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

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.4 times
0.8 times
0.7 times
0.6 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________.

Lower surface
Neutral surface
None of these
Upper surface

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