Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ Direct on line None of the listed here Star-delta starting By auto transformer starting Direct on line None of the listed here Star-delta starting By auto transformer starting ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the frequency of 3-phase supply to the stator of a 3-phase induction motor is increased, then synchronous speed ______ Is decreased None of the listed here Remains unchanged Is increased Is decreased None of the listed here Remains unchanged Is increased ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The good power factor of an induction motor can be achieved if the average flux density in the air gap is Small Infinity Absent Large Small Infinity Absent Large 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 25 Hz 50 Hz 60 Hz None of the listed here 25 Hz 50 Hz 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The starting torque of a squirrel cage induction motor is Slightly more than full load torque Negligible Same as full load torque Low Slightly more than full load torque Negligible Same as full load torque Low 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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