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Theory of Machine

Theory of Machine
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

l = 2p - 3
l = 2p - 5
l = 2p - 4
l = 2p - 2

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Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, 0
0, and more than co2r
cor, 0
0, and less than coV

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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

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

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Theory of Machine
Klein's construction is useful to determine

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

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Theory of Machine
A system in dynamic balance implies that

There is no critical speed in the system
There will absolutely no wear of bearings
The system is critically damped
The system is also statically balanced

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Theory of Machine
Which of the following is a turning pair?

Piston and cylinder of a reciprocating steam engine
Ball and a socket joint
Shaft with collars at both ends fitted into a circular hole
Lead screw of a lathe with nut

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