## Theory of Machine The D-slide valve is also known as

Piston slide valve
None of these

## Theory of Machine Angle of action of cam is defined as the angle

Moved by the cam from beginning of ascent to the termination of descent
Of rotation of the cam for a definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Self-closed
Friction closed
Force-closed
None of these

m₁ r₂ = m₂ r₁
None of these
m₁ r₁ = m₂ r₂
m₁ m₂ = r₁ r₂

## Theory of Machine A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is -ve
a is +ve and b is also +ve
a is +ve and b = 0
a = 0 and b is +ve

## Theory of Machine Whirling speed of the shaft is the speed at which

Shaft tends to vibrate in longitudinal direction
Torsional vibrations occur
Shaft tends to vibrate vigorously in transverse direction
Combination of transverse and longitudinal vibration occurs