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Theory of Machine

Theory of Machine
The relative velocity of B with respect to A in a rigid link AB is

Parallel to AB
Perpendicular to AB
Along AB
At 45° to AB

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Theory of Machine
The example of completely constrained motion is a

All of these
Motion of a shaft with collars at each end in a circular hole
Motion of a piston in the cylinder of a steam engine
Motion of a square bar in a square hole

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Theory of Machine
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

Vertically and perpendicular
Vertically and parallel
Horizontally and parallel
Horizontally and perpendicular

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. (n + 1)/n
ω²r. n/(n + 1)
ω²r. (n - 1)/n
ω²r. n/(n - 1)

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)

v²BA /AB
vBA × AB
vBA /AB
v²BA

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Theory of Machine
Instantaneous center of rotation of a link in a four bar mechanism lies on

Can’t occur
Right side pivot of this link
A point obtained by intersection on extending adjoining links
Left side pivot of this link

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