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Theory of Machine

Theory of Machine
The lower pairs are _________ pairs.

Friction closed
Force-closed
None of these
Self-closed

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Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

None of these
Remain same
Decreases
Increases

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Theory of Machine
Governor is used in automobile to

Maintain constant engine speed
Limit the vehicle speed
Decrease the variation of speed
Maximize the fuel economy

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Theory of Machine
The centre of gravity of a coupler link in a four bar mechanism will experience

Only angular acceleration
Both linear and angular acceleration
Only linear acceleration
No acceleration

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. n/(n - 1)
ω²r. (n + 1)/n
ω²r. (n - 1)/n
ω²r. n/(n + 1)

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Theory of Machine
In a multiple V-belt drive, if one of the belts is broken, then we should replace

All the belts
The broken belt only
The broken belt and the belts on either side of it
None of these

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