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.

104) The secondary unbalanced force is maximum __________ in one revolution of the crank.

105) A spring controlled governor is found unstable. It can be made stable by