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Theory of Machine

Theory of Machine
A cam mechanism imparts following motion

Reciprocating
Rotating
Oscillating
All of these

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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 sinθ
m.ω².r cosθ

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

μ W R
(2/3) μ W R
(1/2) μ W R
(3/4) μ W R

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Decreases exponentially with time
Decreases linearly with time
Increases linearly with time
Increases exponentially with time

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Theory of Machine
A chain comprises of 5 links having 5 joints. Is it kinematic chain?

It is a marginal case
Yes
No
Data are insufficient to determine it

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Theory of Machine
The motion of a shaft in a circular hole is an example of

None of these
Successfully constrained motion
Incompletely constrained motion
Completely constrained motion

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