Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

Longitudinal vibration
None of these
Torsional vibration
Transverse vibration

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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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