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Theory of Machine

Theory of Machine
If two moving elements have surface contact in motion, such pair is known as

Higher pair
Rolling pair
Surface pair
Sliding pair

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Theory of Machine
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Spherical pair
Turning pair
Sliding pair
Screw pair

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Theory of Machine
In order to balance the reciprocating masses,

None of these
Primary forces and couples must be balanced
Both (A) and (B)
Secondary forces and couples must be balanced

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Theory of Machine
For fluctuating loads, well suited bearing is

Ball bearing
Thrust bearing
Roller bearing
Needle roller bearing

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Theory of Machine
The height of a Watt's governor is

Inversely proportional to speed
Inversely proportional to (speed)²
Directly proportional to speed
Directly proportional to (speed)²

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Theory of Machine
The train value of a gear train is

Equal to velocity ratio of a gear train
Reciprocal of velocity ratio of a gear train
Always less than unity
Always greater than unity

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