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Theory of Machine

Theory of Machine
The number of links in pantograph mechanism is equal to

4
5
2
3

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Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

2π qI
(1/2π). √(q/I)
1/2π
2π. √(q/I)

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Theory of Machine
When the crank is at the inner dead center, in a reciprocating steam engine, then the acceleration of the piston will be

ω²r. n/(n + 1)
ω²r. n/(n - 1)
ω²r. (n + 1)/n
ω²r. (n - 1)/n

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Theory of Machine
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

1.4 N-s/m
529.2 N-s/m
18.52 N-s/m
52.92 N-s/m

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Theory of Machine
In a shaper mechanism, the Coriolis component of acceleration will

Exist
None of these
Depend on position of crank
Not exist

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Theory of Machine
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.

Forward
Downward
Backward
Upward

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