a) Heat only b) Magnetic field only c) (a) and (b) d) Power only Ans: (c)
a) Series generator b) Series motor c) Shunt generator d) Compound generator e) Shunt motor f) None of the above Ans: (c)
a) Decrease b) Increase c) Remain same d) Increase then decrease Ans: (b)
a) Provides better overload capacity b) Reduces overload capacity c) Provides bigger size of motor d) Reduces the size of motor Ans: (a)
a) Large b) Small c) Infinity d) Absent Ans: (b)
a) The torque is proportional to armature current. b) The torque is proportional to square root of armature current. c) The speed is inversely proportional to the torque and the torque is proportional to square of armature current. d) Torque and speed are inversely proportional to armature current. Ans: (c)
a) Separately excited generator b) Self-excited generator c) Level compound generator d) All the above machines Ans: (c)
a) 100% regulation b) Small c) 10% regulation d) Infinity Ans: (b)
a) The tapping are provided at the phase ends b) The tapping are provided at the high voltage side c) The tapping are provided in middle of the transformer d) The tapping are provided on the low voltage side Ans: (a)
a) 100 kVA b) 800 kVA c) All the above transformers Ans: (c)
a) 2 poles b) 6 poles c) 4 poles d) 8 poles Ans: (b)
a) Electrical iron b) Tubelight c) Three phase motor d) rectifier Ans: (c)
a) It is easier to make narrow slots than wide open slots b) Large number of narrow slots reduces motor noise c) Large number of narrow slots reduces noise and tooth pulsation losses d) It helps in uniform distribution of flux Ans: (c)
a) 4 b) 6 c) 2 d) 8 Ans: (c)
a) 3° to 5° b) 2 rad to 3 rad c) 15° to 30° d) 1° to 3° Ans: (d)
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