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Theory of Machine

Theory of Machine
The number of links and instantaneous centers in a reciprocating engine mechanism are

4, 4
4, 6
5, 4
4, 5

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W cosecθ
W tanθ
W cosθ
W sinθ

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Theory of Machine
The two elements of a pair are said to form a higher pair, when they

Have a line or point contact when in motion
Permit relative motion
Are kept in contact by the action of external forces, when in motion
Have a surface contact when in motion

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Theory of Machine
Typewriter constitutes

Machine
Mechanism
Inversion
Structure

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Theory of Machine
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as

Tractive force
None of these
Hammer blow
Swaying couple

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Theory of Machine
The example of higher pair is

Belt, rope and chain drives
All of these
Gears, cams
Ball and roller bearings

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