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Theory of Machine

Theory of Machine
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)

π/ω
ω/2π
2π/ω
ω × 2π

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

Inertia
Torque
Momentum
Moment of momentum

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Theory of Machine
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is

Fc = ar - b
Fc = ar
Fc = a/r + b
Fc = ar + b

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Theory of Machine
Shaft revolving in a bearing is the following type of pair

Lower pair
Cylindrical pair
Higher pair
Spherical pair

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Theory of Machine
A circle passing through the pitch point with its center at the center of cam axis is known as

Prime circle
Pitch circle
Base circle
Outer circle

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Theory of Machine
In an open pair, the two elements of a pair

Have a surface contact when in motion
Are not held together mechanically
Have a line or point contact when in motion
Are kept in contact by the action of external forces, when in motion

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