99) The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

100) For static balancing of a shaft, the net dynamic force acting on the shaft is equal to zero.

101) A spring controlled governor is said to be unstable, if the relation between the controlling force (F_c) and radius of rotation (r) is Fc = ar.

102) The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

103) Most of the engines, generally, do not require balancing of secondary forces and couples.