Three Phase Induction Motors The efficiency of an induction motor can be expected to be nearly 80 to 90% 60 to 90% 99% 95 to 98 % 80 to 90% 60 to 90% 99% 95 to 98 % ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel cage induction motor is changed by Cascade control Rheostatic control Pole changing None of the listed here Cascade control Rheostatic control Pole changing None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The power factor of an induction motor under no load conditions will be closer to 0.2 leading 0.5 leading Unity 0.2 lagging 0.2 leading 0.5 leading Unity 0.2 lagging ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 3-phase wound rotor morors are also called _____ motors. Commutator Synchronous Slip ring Series Commutator Synchronous Slip ring Series ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have Zero frequency The same phase as the rotor e.m.f. High value for the satisfactory speed control The same frequency as the slip frequency Zero frequency The same phase as the rotor e.m.f. High value for the satisfactory speed control The same frequency as the slip frequency 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 _____ None of the listed here 50 Hz 60 Hz 25 Hz None of the listed here 50 Hz 60 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS