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Theory of Machine

Theory of Machine
A rigid body possesses ________degrees of freedom

Six
One
Two
Four

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Theory of Machine
Which of the following mechanisms produces mathematically an exact straight line motion?

Tchebicheff mechanism
Grasshopper mechanism
Peaucellier's mechanism
Watt mechanism

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Theory of Machine
The moment on the pulley which produces rotation is called

Inertia
Moment of momentum
Momentum
Torque

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

Neither fixed nor permanent instantaneous centers
Permanent instantaneous centers
Fixed instantaneous centers
None of these

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Theory of Machine
In order to balance the reciprocating masses,

Both (A) and (B)
Secondary forces and couples must be balanced
None of these
Primary forces and couples must be balanced

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

μwr
²/₃ μWR
¾μWR
½μWR

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