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Theory of Machine

Theory of Machine
Cross head and guides form a

Higher pair
Turning pair
Lower pair
Sliding pair

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Theory of Machine
In an open pair, the two elements of a pair

Have a surface contact when in motion
Are kept in contact by the action of external forces, when in motion
Are not held together mechanically
Have a line or point contact when in motion

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Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Hartung governor
Inertia governor
Pickering governor
Wilson Hartnell governor

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Theory of Machine
The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called

Coriolis component
Radial component
None of these
Tangential component

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Theory of Machine
In a ball bearing, ball and bearing forms a

Rolling pair
Spherical pair
Screw pair
Turning pair

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Decreases linearly with time
Increases exponentially with time
Increases linearly with time
Decreases exponentially with time

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