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Theory of Machine

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

Depend on position of crank
Not exist
Exist
None of these

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Theory of Machine
When the axes of the first and last wheels are coaxial, then the train is known as

Simple train of wheels
Compound train of wheels
Reverted gear train
Epicyclic gear train

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Theory of Machine
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be

To raise the nose and tail
To dip the nose and raise the tail
To raise the nose and dip the tail
To dip the nose and tail

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Theory of Machine
Maximum fluctuation of energy in a flywheel is equal to [where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = (ω₁ + ω₂)/2]

I.ω.(ω₁ - ω₂)
All of these
I.ω².CS
2.E.CS

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Theory of Machine
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)

ω (r₁ + r₂) sinθ sec2θ
ω (r₁ r₂) sinθ
ω (r₁ r₂) cosθ
ω (r₁ + r₂) cosθ cosec2θ

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Theory of Machine
A spring controlled governor is said to be isochronous when the controlling force

Decreases as the radius of rotation increases
Remain constant for all radii of rotation
Increases as the radius of rotation decreases
Increases as the radius of rotation increases

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MORE MCQ ON Theory of Machine

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