a) Low speed at high loads and high speed at low loads b) Low speed at low loads and high speed at low loads c) Widely varying speed d) Constant speed Ans: (d)
a) Run at lower speed b) Burn c) Run at normal speed d) Run continuously but for sparking at brushes Ans: (b)
a) Torque remains constant but h.p. will change b) Horse power remains constant but torque will change c) Both remains constant d) Both will change Ans: (b)
a) Half of the speed of the motors b) Rated speed of any of the motors c) One-fourth of the speed of the motors d) Same as in parallel Ans: (c)
a) Half the torque when they are connected in parallel b) Twice the torque when they are connected in parallel c) Four times the torque when they are connected in parallel d) Equal to the torque when they are connected in parallel Ans: (c)
a) Due to armature reaction and leakage of flux both b) Due to armature reaction of the machine c) Due to leakage flux d) Of synchronous machine Ans: (a)
a) Resistively b) Conductively c) Inductively d) None of these Ans: (b)
a) Field flux b) Armature resistance c) Applied voltage d) All of these Ans: (d)
a) Depends on requirement b) Compound motor is used c) Shunt motor is used d) Series motor is used Ans: (a)
a) They are not self-starting b) To light the high initial current by inserting high resistance c) To overcome back emf d) None of these Ans: (b)