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Theory of Machine

Theory of Machine
The moment on the pulley which produces rotation is called

Inertia
Momentum
Torque
Moment of momentum

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

0°
90°
270°
180°

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

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Theory of Machine
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on A. A triangle

A triangle
Two lines
A straight line
A point

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Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

14°
20°
10°
30°

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

45 mm
95 mm
Slightly less than 95 mm
Slightly more than 95 mm

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