Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 0.4 mm to 4 mm 1 cm to 2 cm 4 cm to 6 cm 2 cm to 4 cm 0.4 mm to 4 mm 1 cm to 2 cm 4 cm to 6 cm 2 cm to 4 cm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The complete circle diagram of induction motor can be drawn with the help of data found from Stator resistance test Blocked rotor test All of these No-load test Stator resistance test Blocked rotor test All of these No-load test ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Proper ventilation Auto transformer starter Having number of rotor slots more or less than the number of stator slots Using DOL starter Proper ventilation Auto transformer starter Having number of rotor slots more or less than the number of stator slots Using DOL starter ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A high starting torque can be obtained in a 3phase induction motor by _______ Decreasing rotor resistance None of the listed here Increasing rotor resistance Increasing rotor reactance Decreasing rotor resistance None of the listed here Increasing rotor resistance Increasing rotor reactance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 80 to 90% 99% 60 to 90% 95 to 98 % 80 to 90% 99% 60 to 90% 95 to 98 % ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The synchronous speed of a 3-phase induction motor having 20 poles and connected to a 50 Hz source is _____ 1200 rpm 600 rpm 300 rpm 1000 rpm 1200 rpm 600 rpm 300 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
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