Theory of Machine
Which of the following statement is correct for involute gears?

A convex flank is always in contact with concave flank.
The variation in centre distance of shafts increases radial force.
The interference is inherently absent.
The pressure angle is constant throughout the teeth engagement.

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Theory of Machine
Effort of a governor is the

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

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