Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Surface contact
Body contact
None of these
Line or point contact

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Theory of Machine
A governor is said to be stable, if the

Radius of rotation of balls increases as the equilibrium speed increases
Radius of rotation of balls decreases as the equilibrium speed increases
Radius of rotation of balls decreases as the equilibrium speed decreases
Radius of rotation of balls increases as the equilibrium speed decreases

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Theory of Machine
Sensitiveness of the governor is defined as the ratio of the

Sum of the maximum and minimum equilibrium speeds to the mean speed
Mean speed to the maximum equilibrium speed
Mean speed to the minimum equilibrium speed
Difference of the maximum and minimum equilibrium speeds to the mean speed

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