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Theory of Machine

Theory of Machine
The relative velocity of B with respect to A in a rigid link AB is

Along AB
Parallel to AB
At 45° to AB
Perpendicular to AB

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Theory of Machine
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Equal to 2
Greater than 2
Less than 2
Equal to 1

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Theory of Machine
The working depth of a gear is the radial distance from the

Pitch circle to the top of a tooth
Pitch circle to the bottom of a tooth
Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle

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

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Theory of Machine
Critical damping is a function of

Mass and natural frequency
Mass and stiffness
Mass and damping coefficient
Damping coefficient and natural frequency

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Theory of Machine
The C.G. of a link in any mechanism would experience

No acceleration
Linear acceleration
Both angular and linear accelerations
Angular acceleration

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