Three Phase Induction Motors The crawling in an induction motor is caused by Low voltage supply Improper design of machine Harmonics developed in the rotor High loads Low voltage supply Improper design of machine Harmonics developed in the rotor High loads 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 3-phase wound rotor morors are also called _____ motors. Commutator Synchronous Series Slip ring Commutator Synchronous Series Slip ring 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 Friction and windage loss of a 3 phase induction motor are None of the listed here Minimum at no load Maximum at no load Remains the same at all loads None of the listed here Minimum at no load Maximum at no load Remains the same at all loads ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required Less costly motor is not required Speed control is required High rotor resistance is required during running High starting torque is required ANSWER DOWNLOAD EXAMIANS APP
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