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Theory of Machine

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

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

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Theory of Machine
The unbalanced primary forces in a reciprocating engine are

Not balanced
Balanced partially
Balanced by secondary forces
Balanced completely

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Theory of Machine
Relationship between the number of links (L) and number of pairs (P) is

P = 2L + 2
P = 2L + 4
P = 2L - 4
P = 2L - 2

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Theory of Machine
The frequency of oscillation of a torsional pendulum is

r/2πk. √(l/g)
r/2πk. √(g/l)
2πr/k. √(g/l)
2πk/r. √(g/l)

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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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