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Machine Design

Machine Design
If two springs are in parallel then their overall stiffness will be

None of these
Same
Half
Double

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Machine Design
According to I.B.R., the thickness of the boiler shell should not be less than

7 mm
5 mm
6 mm
4 mm

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Machine Design
In testing a material for endurance strength, it is subjected to

Dynamic load
Completely reversed load
Impact load
Static load

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Machine Design
The period during which the cam follower remains at rest, when cam moves, is known as

Idle period
Dwell period
Constant period
Fixed period

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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
45° - φ/2
45° + φ/2

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Machine Design
A connecting rod should be

Strong in buckling about X-axis
Strong in buckling about Y-axis
Any one of the above
Equally strong in buckling about X-axis and Y-axis

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