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Theory of Machine

Theory of Machine
A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

2ωv
ωv
ω²v
2ωv²

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Theory of Machine
The number of links and instantaneous centers in a reciprocating engine mechanism are

4, 4
4, 5
4, 6
5, 4

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Theory of Machine
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Maximum and zero
Zero and maximum
Minimum and maximum
Zero and minimum

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Theory of Machine
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)

(S₁ + S₂) / 2h
(S₁ - S₂) / 2h
(S₁ + S₂) / h
(S₁ - S₂) / h

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Theory of Machine
The purpose of a link is to

Transmit motion
Guide other links
Act as a support
All of these

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Theory of Machine
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)

0.5615/√δ
0.6253/√δ
0.571/√δ
0.4985/√δ

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