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Theory of Machine

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

Increases
Remain same
Decreases
None of these

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Theory of Machine
Which of the following is a higher pair?

Sliding pair
Turning pair
Belt and pulley
Screw pair

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Theory of Machine
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be

Unstable
Stable
Hunt
Isochronous

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Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂ - 1
n₁ + n₂
n₁ + n₂ + 1
n₁ + n₂ - 2

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Theory of Machine
A friction circle is a circle drawn when a journal rotates in a bearing. Its radius depends upon the coefficient of friction and the

Angular velocity of journal
Radius of journal
Magnitude of the forces on journal
Clearance between journal and bearing

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Theory of Machine
Which of the following is a turning pair?

Lead screw of a lathe with nut
Piston and cylinder of a reciprocating steam engine
Ball and a socket joint
Shaft with collars at both ends fitted into a circular hole

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