Theory of Machine
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

Meyer's expansion valve
Flywheel
Governor
D-slide valve

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, if N coincides with O, then

Acceleration and velocity of the piston P is maximum
Acceleration of the piston P is maximum and its velocity is zero
Acceleration and velocity of the piston P is zero
Acceleration of the piston P is zero and its velocity is maximum

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

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

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