Theory of Machine
Length of arc of contact is given by

Arc of approach / Arc of recess
Arc of approach - Arc of recess
Arc of approach × Arc of recess
Arc of approach + Arc of recess

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Theory of Machine
Power of a governor is the

Mean force exerted at the sleeve for a given percentage change of speed
Mean force exerted at the sleeve for maximum equilibrium speed
None of these
Work-done at the sleeve for maximum equilibrium speed

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Theory of Machine
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then

Both open belt drive and crossed belt drive is recommended
Crossed belt drive is recommended
The drive is recommended depending upon the torque transmitted
Open belt drive is recommended

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