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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
At 45° to AB
Perpendicular to AB
Along AB

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Theory of Machine
Rectilinear motion of piston is converted into rotary by

Gudgeon pin
Cross head
Connecting rod
Slider crank

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

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

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Theory of Machine
Which of the following is an open pair?

Cam and follower
Lead screw and nut
Ball and socket joint
Journal bearing

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Theory of Machine
A kinematic chain requires at least

4 links and 4 turning pairs
2 links and 3 turning pairs
3 links and 4 turning pairs
5 links and 4 turning pairs

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Theory of Machine
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links

Will remain same
Will change
Could change or remain unaltered depending on which link is fixed
Will not occur

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