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Machine Design

Machine Design
In V-belt drive, belt touches

At sides only
Could touch anywhere
At bottom
Both at bottom and sides

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

Friction angle is less than helix angle
Friction angle is equal to helix angle
Friction angle is more than helix angle
Efficiency of screw is 100%

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Machine Design
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

None of these
Shear strength
Yield strength
Elastic strength

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + cosφ)/ (1 - sinφ)

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Machine Design
The yield point in static loading is __________ as compared to fatigue loading.

None of these
Higher
Lower
Same

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

None of these
More than
Less than
Equal to

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