Theory of Machine
Transmission of power from the engine to the rear axle of an automobile is by means of

Compound gears
Crown gear
Hooke's joint
Worm and wheel method

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Theory of Machine
In a mechanism, the fixed instantaneous centers are those centers which

None of the listed here
Remain in the same place for all configurations of the mechanism
Moves as the mechanism moves, but joints are of permanent nature
Vary with the configuration of the mechanism

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