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Machine Design

Machine Design
Screws used for power transmission should have

High efficiency
Low efficiency
Very fine threads
Strong teeth

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Machine Design
The maximum shear stress theory is used for

Brittle materials
Nonferrous materials
Ductile materials
Plastic materials

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Machine Design
When a bolt is subjected to an external load, the stress induced in the bolt will be

Shear stress
Tensile stress
Any one of these
Combined tensile and shear stress

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Machine Design
The belt slip occurs due to

Driving pulley too small
Loose belt
Heavy load
Any one of the above

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Machine Design
Allen bolts are

Provided with hexagonal depression in head
Used in aircraft application
Self locking bolts
Designed for shock load

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Machine Design
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

2 mm for rivet diameter from 39 mm to 48 mm
1 mm for rivet diameter from 27 mm to 36 mm
All of these
0.5 mm up to rivet diameter of 24 mm

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