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Theory of Machine

Theory of Machine
A higher pair has__________.

Surface contact
None of these
No contact
Point contact

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Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

Parallel to its axis
Perpendicular to its axis
In a circle about its axis
None of these

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Theory of Machine
The maximum or minimum value of the swaying couple is

± (a/√2) (1 - c) m.ω².r
± 2a (1 - c) m.ω².r
± c.m.ω².r
± a (1 - c) m.ω².r

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Theory of Machine
In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

Rolling
Turning
Sliding
Screw

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Theory of Machine
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

At 45° to line as per (A)
Perpendicular to line as per (A)
Not possible to determine with these data
Joining the corresponding points

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Theory of Machine
In a four stroke I.C. engine, the turning moment during the compression stroke is

Positive during major portion of the stroke
Negative throughout
Positive throughout
Negative during major portion of the stroke

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