Three Phase Induction Motors Slip rings are usually made of Carbon Phospor bronze Copper Aluminium Carbon Phospor bronze Copper Aluminium ANSWER DOWNLOAD EXAMIANS APP
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 1.5 Hz 5 Hz 0.05 Hz 2.5 Hz 1.5 Hz 5 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If a 4 pole induction motor has a synchronous speed of 1500 rpm, then supply frequency is _____ 60 Hz None of the listed here 50 Hz 25 Hz 60 Hz None of the listed here 50 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have The same phase as the rotor e.m.f. The same frequency as the slip frequency Zero frequency High value for the satisfactory speed control The same phase as the rotor e.m.f. The same frequency as the slip frequency Zero frequency High value for the satisfactory speed control ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor, no load the slip is generally 2% Less than 1% 1.5 % 4% 2% Less than 1% 1.5 % 4% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ Star-delta starting Direct on line None of the listed here By auto transformer starting Star-delta starting Direct on line None of the listed here By auto transformer starting ANSWER DOWNLOAD EXAMIANS APP
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