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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

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

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Theory of Machine
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by

W CE / CS
2 W CE / CS
W CS / 2CE
W CE / 2CS

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Theory of Machine
The total number of instantaneous centers for a mechanism consisting of n links are

n
n - 1
n(n - 1)/2
n/2

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is

(3/4) μ W R cosecα
(1/2) μ W R cosecα
(2/3) μ W R cosecα
μ W R cosecα

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Theory of Machine
Klein's construction can be used when

Crank has a uniform angular velocity
Crank has uniform angular acceleration
Crank has uniform angular velocity and angular acceleration
Crank has non-uniform velocity

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Theory of Machine
The driving and driven shafts connected by a Hooke's joint will have equal speeds, if

sinθ = ± tanα
cotθ = cosα
tanθ = ± cosα
cosθ = sinα

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