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Theory of Machine

Theory of Machine
A pulley and belt in a belt drive form a

Rolling pair
Cylindrical pair
Sliding pair
Turning pair

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

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Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

Stable
None of these
Unstable
Isochronous

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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

Damped vibration
Free vibration
Under damped vibration
Forced vibration

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Theory of Machine
The example of spherical pair is

Ball and socket joint
Lead screw of a lathe
Bolt and nut
Ball bearing and roller bearing

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Theory of Machine
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

cotφ - cotα = c/b
tanφ + cotα = b/c
sinφ + sinα = b/c
cosφ - sinα = c/b

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