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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

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

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Theory of Machine
The direction of linear velocity of any point on a link with respect to another point on the same link is

None of the listed here
Perpendicular to the link joining the points
At 45° to the link joining the points
Parallel to the link joining the points

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Theory of Machine
In railway axle boxes, the bearing used is

Deep groove ball bearing
Cylindrical roller bearing
Double row spherical roller bearing
Double row self aligning ball bearing

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Theory of Machine
The C.G. of a link in any mechanism would experience

Angular acceleration
Both angular and linear accelerations
Linear acceleration
No acceleration

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Theory of Machine
What is the number of instantaneous centers for an eight link mechanism?

30
28
8
15

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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)

²/₃ μWR
½μWR
¾μWR
μwr

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