Three Phase Induction Motors 5 H.P., 50Hz, 3-phase, 440 V, induction motors are available for the following r.p.m. Which motor will be the costliest? 730 rpm 2880 rpm 1440 rpm 1000 rpm 730 rpm 2880 rpm 1440 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors At no load the rotor core loss of a 3 phase induction motor is Large None of the listed here Small Practically zero Large None of the listed here Small Practically zero ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The starting torque of an induction motor is maximum when rotor resistance per phase is _____ rotor reactance / phase. Four times None of the listed here Two times Equal to Four times None of the listed here Two times Equal to ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If an induction motor is running at slip S, then rotor output is ______ (S-1) × rotor input (1-S) × rotor input (1+S) × rotor input S × rotor input (S-1) × rotor input (1-S) × rotor input (1+S) × rotor input S × rotor input ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The rotor winding of a 3phase wound rotor induction motor is generally _______ connected. Star None of the listed here Delta Partly star and partly delta Star None of the listed here Delta Partly star and partly delta ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A high starting torque can be obtained in a 3phase induction motor by _______ Decreasing rotor resistance None of the listed here Increasing rotor resistance Increasing rotor reactance Decreasing rotor resistance None of the listed here Increasing rotor resistance Increasing rotor reactance ANSWER DOWNLOAD EXAMIANS APP
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