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Machine Design

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

Second
First
Third
None of these

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Machine Design
According to I.B.R., the factor of safety of riveted joint should not be less than

1
2
4
3

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

Constant period
Dwell period
Fixed period
Idle period

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Machine Design
A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as

Crown Bevel gears
Angular bevel gears
Mitre gears
Internal bevel gears

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Machine Design
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

σ [1 + (2a/b)]
σ [1 + (b/3a)]
σ [1 + (b/2a)]
σ [1 + (3a/b)]

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Machine Design
A shaft is subjected to

Shear stresses
Bending stresses
Combined bending and shear stresses
All of these

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