Theory of Machine
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

Governor
Meyer's expansion valve
D-slide valve
Flywheel

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Theory of Machine
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will

Oscillate with increasing time period
Oscillate with constant amplitude
Oscillate with decreasing amplitude
Return to equilibrium position without oscillation

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