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 DOL starting of induction motors is usually restricted to Variable speed motors High speed motors High horsepower motors Low horsepower motors Variable speed motors High speed motors High horsepower motors Low horsepower motors 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 _____ 25 Hz 60 Hz None of the listed here 50 Hz 25 Hz 60 Hz None of the listed here 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 3-phase wound rotor morors are also called _____ motors. Slip ring Commutator Series Synchronous Slip ring Commutator Series Synchronous ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The shaft of an induction motor is made of Stainless steel Cast iron Carbon steel High speed steel Stainless steel Cast iron Carbon steel High speed steel ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The advantage of wound rotor motor is that _______ It is inexpensive None of the listed here External resistance can be inserted in the rotor circuit It requires less maintenance It is inexpensive None of the listed here External resistance can be inserted in the rotor circuit It requires less maintenance ANSWER DOWNLOAD EXAMIANS APP
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