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Theory of Machine

Theory of Machine
Which of the following mechanism is obtained from lower pair?

Valve and valve gears
Pantograph
Gyroscope
All of these

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Theory of Machine
Instantaneous center of rotation of a link in a four bar mechanism lies on

A point obtained by intersection on extending adjoining links
Can’t occur
Left side pivot of this link
Right side pivot of this link

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

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

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Theory of Machine
The axis of precession is __________ to the plane in which the axis of spin is going to rotate.

None of these
Both A and B
Perpendicular
Parallel

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

²/₃ μWR
½μWR
μwr
¾μWR

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Theory of Machine
Elements of pairs held together mechanically is known as

Open pair
Closed pair
Rolling pair
Mechanical pair

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