Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 90% None of the listed here 40% 65% 90% None of the listed here 40% 65% ANSWER DOWNLOAD EXAMIANS APP
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? 1440 rpm 1000 rpm 2880 rpm 730 rpm 1440 rpm 1000 rpm 2880 rpm 730 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of stator slots is _______ rotor slots. Either more or less than the number of Always eqaul to the number of Always greater than the number of Always less than the number of Either more or less than the number of Always eqaul to the number of Always greater than the number of Always less than the number of ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If a 3 phase induction motor is running at a slip S, then approximate efficiency of the motor is ______ S-1 None of the listed here 1-S 1+S S-1 None of the listed here 1-S 1+S 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 ______ None of the listed here Is decreased Remains unchanged Is increased None of the listed here Is decreased Remains unchanged Is increased ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor if air gap increased Copper loss will reduce Windage losses will be more The power factor will be low Bearing friction will reduce Copper loss will reduce Windage losses will be more The power factor will be low Bearing friction will reduce ANSWER DOWNLOAD EXAMIANS APP
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