Theory of Machine
The factor which affects the critical speed of a shaft is

Eccentricity
All of the listed here
Diameter of disc
Span of shaft

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Theory of Machine
The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to

One lower pair and two additional links
Two lower pairs and one additional link
Two lower pairs and two additional links
Any one of these

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Theory of Machine
Power of a governor is the

Work-done at the sleeve for maximum equilibrium speed
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

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