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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Compression
All of these
Tension

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

None of these
Third
Second
First

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Machine Design
Rivets are generally specified by

Nominal diameter
Length of rivet
Diameter of head
Thickness of plates to be riveted

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Machine Design
The design of the pressure vessel is based on

Longitudinal and hoop stress
Longitudinal stress
Hoop stress
None of these

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Machine Design
The product of the diametral pitch and circular pitch is equal to

1/π
1
π
π × number of teeth

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Machine Design
The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction)

90° - φ
45° - φ/2
45° - φ
45° + φ/2

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