Theory of Machine
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

Flexible coupling
Universal coupling
Chain coupling
Oldham's coupling

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Theory of Machine
The maximum fluctuation of speed is the

Variations of speed above and below the mean resisting torque line
Difference of the maximum and minimum speeds
Difference of minimum fluctuation of speed and the mean speed
Sum of maximum and minimum speeds

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