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Theory of Machine

Theory of Machine
Hart mechanism has

Eight links
Six links
Four links
Twelve links

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Theory of Machine
The number of links and instantaneous centers in a reciprocating engine mechanism are

4, 4
4, 6
4, 5
5, 4

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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)

¾μWR
½μWR
²/₃ μWR
μwr

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Theory of Machine
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a

Turning pair
Sliding pair
Screw pair
Spherical pair

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Theory of Machine
Shaft revolving in a bearing is the following type of pair

Higher pair
Cylindrical pair
Lower pair
Spherical pair

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Theory of Machine
The following is the inversion of slider crank chain mechanism

Oscillating cylinder engine
All of these
Whitworth quick return mechanism
Hand pump

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