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Theory of Machine

Theory of Machine
When a ship travels in a sea, which of the effect is more dangerous

Steering
Pitching
All of these
Rolling

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Theory of Machine
The cam follower generally used in aircraft engines is

Roller follower
Spherical faced follower
Knife edge follower
Flat faced follower

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Theory of Machine
Angular acceleration of a link can be determined by dividing the

Resultant acceleration with length of link
All of these
Centripetal component of acceleration with length of link
Tangential component of acceleration with length of link

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Theory of Machine
A watt's governor can work satisfactorily at speeds from

100 to 200 r.p.m.
80 to 100 r.p.m.
60 to 80 r.p.m.
200 to 300 r.p.m.

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Theory of Machine
The factional torque for square thread at the mean radius r while raising load W is given by

T = W.r tan(φ + α)
T = W.r tanα
T = W.r tan(φ - α)
T = W.r tanφ

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Theory of Machine
The critical speed of a shaft depends upon its

Stiffness and eccentricity
Stiffness
Mass and stiffness
Mass

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