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Theory of Machine

Theory of Machine
The lower pairs are _________ pairs.

None of these
Self-closed
Force-closed
Friction closed

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Theory of Machine
The power of a Porter governor is equal to

[c²/(1 + 2c)] (m + M) g.h
[3c²/(1 + 2c)] (m + M) g.h
[2c²/(1 + 2c)] (m + M) g.h
[4c²/(1 + 2c)] (m + M) g.h

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Theory of Machine
In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as

Hammer blow
Tractive force
Swaying couple
None of these

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Theory of Machine
Which of the following mechanisms produces mathematically an exact straight line motion?

Grasshopper mechanism
Tchebicheff mechanism
Peaucellier's mechanism
Watt mechanism

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

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

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Theory of Machine
The Klein's diagram is useful to find

Displacement of various parts
Acceleration of various parts
Angular acceleration of various parts
Velocity of various parts

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