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Machine Design

Machine Design
The suitable material for belt in agricultural machinery is

Balata gum
Leather
Rubber
Cotton duck

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Machine Design
The maximum efficiency of a square threaded screw is

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

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

Less than
Equal to
More than
None of these

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Machine Design
In a flange coupling, the flanges are coupled together by means of

None of these
Headless taper bolts
Studs
Bolts and nuts

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Machine Design
The longitudinal stress is __________ of the circumferential stress.

Two-third
Double
One-half
Three-fourth

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Machine Design
A bench vice has following type of threads

Acme
Square
Metric
Buttress

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