Three Phase Induction Motors A high starting torque can be obtained in a 3phase induction motor by _______ None of the listed here Decreasing rotor resistance Increasing rotor reactance Increasing rotor resistance None of the listed here Decreasing rotor resistance Increasing rotor reactance Increasing rotor resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors 3-phase wound rotor morors are also called _____ motors. Slip ring Synchronous Series Commutator Slip ring Synchronous Series Commutator ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ Star-delta starting By auto transformer starting Direct on line None of the listed here Star-delta starting By auto transformer starting Direct on line None of the listed here 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 25 Hz 50 Hz 60 Hz None of the listed here 25 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the air gap between the rotor and stator of a 3-phase induction motor is increased, then_______ No load current is decreased None of the listed here Leakage reactances are decreased Leakage reactances are increased No load current is decreased None of the listed here Leakage reactances are decreased Leakage reactances are increased ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The 3- phase induction motor is so designed that the rotor should have ______ under running conditions. High reactance Low resistance Large slip high resistance High reactance Low resistance Large slip high resistance ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS