Theory of Machine
A spring controlled governor is found unstable. It can be made stable by

Decreasing the ball mass
Increasing the ball mass
Decreasing the spring stiffness
Increasing the spring stiffness

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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
Open belt drive is recommended
The drive is recommended depending upon the torque transmitted
Crossed belt drive is recommended

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Theory of Machine
For dynamic balancing of a shaft

Both (A) and (B)
None of these
The net dynamic force acting on the shaft is equal to zero
The net couple due to the dynamic forces acting on the shaft is equal to zero

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