a) Suitability of high speeds b) Higher efficiency c) Higher power factor d) That it can be started using factor resistance Ans: (d)
a) 700 W b) 625 W c) 600 W d) 650 W Ans: (b)
a) Low inductance and low resistance b) Low inductance and high resistance c) High inductance and high resistance d) High inductance and low resistance Ans: (c)
a) Rotor resistance b) Star-delta c) Auto-transformer d) Stator resistance Ans: (c)
a) Reduced noise b) Reduced pulsation losses c) Better cooling d) Increased overload capacity Ans: (b)
a) Increase b) Reduce c) Remain the same d) Become zero Ans: (b)
a) Integral slot winding b) Chording c) Skewing d) None of these Ans: (b)
a) Is stationary relative to the field of the fundamental b) Rotates in forward direction at the harmonic speed c) Rotates in backward direction d) Oscillates at harmonic frequency Ans: (c)
a) Dc shunt motors b) Slip ring induction motors c) Synchronous motors d) Squirrel cage induction motors Ans: (d)
a) Refuses to start at load b) Refuses to start at no load c) Runs at low speed and then stops d) Runs at very low speed Ans: (b)