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Theory of Machine

Theory of Machine
The number of links in pantograph mechanism is equal to

2
3
5
4

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

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Theory of Machine
A chain comprises of 5 links having 5 joints. Is it kinematic chain?

It is a marginal case
Data are insufficient to determine it
No
Yes

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Theory of Machine
The method of obtaining different mechanisms by fixing in turn different links in a kinematic chain, is known as

Inversion
Structure
Compound mechanism
Machine

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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
¾μWR
½μWR
²/₃ μWR

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Theory of Machine
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

Forced vibration
Damped vibration
Under damped vibration
Free vibration

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