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Theory of Machine

Theory of Machine
A pulley and belt in a belt drive form a

Turning pair
Sliding pair
Rolling pair
Cylindrical pair

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Theory of Machine
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

ω² × OQ tanθ
ω² × OQ
ω² × OQ sinθ
ω² × OQ cosθ

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Theory of Machine
The Coriolis component of acceleration acts

Parallel to the sliding surface
Along the sliding surface
At 45° to the sliding surface
Perpendicular to the sliding surface

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Theory of Machine
In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by

ω cosθ/(n² - cos²θ)1/2
ω cosθ/(n² - sin²θ)1/2
ω sinθ/(n² - cos²θ)1/2
ω sinθ/(n² - sin²θ)1/2

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Theory of Machine
The motion of a shaft in a circular hole is an example of

None of these
Successfully constrained motion
Incompletely constrained motion
Completely constrained motion

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Theory of Machine
The centre of gravity of a coupler link in a four bar mechanism will experience

No acceleration
Both linear and angular acceleration
Only linear acceleration
Only angular acceleration

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