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Theory of Machine

Theory of Machine
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

None of these
Same as
More than
Less than

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Theory of Machine
The example of successfully constrained motion is a

Motion of an I.C. engine valve
All of these
Motion of the shaft between a footstep bearing
Piston reciprocating inside an engine cylinder

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Theory of Machine
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)

m.ω².r (cosθ - sinθ)
(1 - c).m.ω².r (cosθ - sinθ)
m.ω².r cosθ
m.ω².r sinθ

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Theory of Machine
Two systems shall be dynamically equivalent when

M.I. of two about an axis through e.g. is equal
G. of two coincides
The mass of two are same
All of these

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Theory of Machine
Module of a gear is

D/T
2D/T
2T/D
T/D

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Slider crank mechanism
Kinematic chain
Roller cam mechanism
Five link mechanism

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