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? 2880 rpm 1440 rpm 730 rpm 1000 rpm 2880 rpm 1440 rpm 730 rpm 1000 rpm 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_______ Leakage reactances are increased Leakage reactances are decreased None of the listed here No load current is decreased Leakage reactances are increased Leakage reactances are decreased None of the listed here No load current is decreased ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A high starting torque can be obtained in a 3phase induction motor by _______ Increasing rotor reactance Increasing rotor resistance Decreasing rotor resistance None of the listed here Increasing rotor reactance Increasing rotor resistance Decreasing rotor resistance None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The cogging of an induction motor can be avoided by Proper ventilation Using DOL starter Auto transformer starter Having number of rotor slots more or less than the number of stator slots Proper ventilation Using DOL starter Auto transformer starter Having number of rotor slots more or less than the number of stator slots ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The rotor winding of a 3phase wound rotor induction motor is generally _______ connected. None of the listed here Partly star and partly delta Delta Star None of the listed here Partly star and partly delta Delta Star ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage rotor, the bars are not placed parallel to the shaft but are skewed to have ______ Less rotor losses Greater mechanical strength None of the listed here Uniform torque Less rotor losses Greater mechanical strength None of the listed here Uniform torque ANSWER DOWNLOAD EXAMIANS APP
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