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Machine Design

Machine Design
The helix angle for double helical gears may be made up to

90°
45°
60°
75°

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Machine Design
Failure of a material is called fatigue when it fails

Below the yield point
At the yield point
Below the elastic limit
At the elastic limit

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Machine Design
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.

20 times
10 times
15 times
5 times

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Machine Design
The pitch of threads on a Jock nut in comparison to pitch of nut is

Very fine
Same
Coarser
Finer

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Machine Design
Guest's theory is used for

Plastic materials
Ductile materials
Brittle materials
Elastic materials

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Machine Design
Fibrous fracture occurs in

Elastic material
Hard material
Ductile material
Brittle material

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