Three Phase Induction Motors The frequency of rotor current in a 6-pole , 50 Hz, 3-phase induction motor running at 950 rpm is 0.05 Hz 2.5 Hz 5 Hz 1.5 Hz 0.05 Hz 2.5 Hz 5 Hz 1.5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Proper ventilation Having number of rotor slots more or less than the number of stator slots Auto transformer starter Using DOL starter Proper ventilation Having number of rotor slots more or less than the number of stator slots Auto transformer starter Using DOL starter ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The advantage of wound rotor motor is that _______ External resistance can be inserted in the rotor circuit None of the listed here It is inexpensive It requires less maintenance External resistance can be inserted in the rotor circuit None of the listed here It is inexpensive It requires less maintenance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The full load slip of a 3-phase induction motor ranges from None of the listed here 20 to 30 % 10 to 20 % 2 to 5 % None of the listed here 20 to 30 % 10 to 20 % 2 to 5 % ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors For higher efficiency of 3-phase induction motor, the slip should be Large 1 Very large As small as possible Large 1 Very large As small as possible ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The magnetising current drawn by a 3 phase induction motor is about _______ of full load stator current. 5% 15 to 20 % 10 to 15% 30 to 50% 5% 15 to 20 % 10 to 15% 30 to 50% ANSWER DOWNLOAD EXAMIANS APP
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