Theory of Machine
Governor is used in automobile to

Maintain constant engine speed
Limit the vehicle speed
Maximize the fuel economy
Decrease the variation of speed

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Theory of Machine
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done

In order to have acceleration in beginning and retardation at the end of stroke within the finite limits
Because the uniform velocity motion is a partial parabolic motion
Because of loose contact of follower with cam surface
Because of difficulty in manufacturing cam profile

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Theory of Machine
The inversion of a mechanism is

Changing of a higher pair to a lower pair
Obtained by fixing different links in a kinematic chain
Turning its upside down
Obtained by reversing the input and output motion

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