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 1000 rpm 730 rpm 1440 rpm 2880 rpm 1000 rpm 730 rpm 1440 rpm 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 _____ 50 Hz 25 Hz None of the listed here 60 Hz 50 Hz 25 Hz None of the listed here 60 Hz ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In an induction motor if air gap increased Windage losses will be more Bearing friction will reduce The power factor will be low Copper loss will reduce Windage losses will be more Bearing friction will reduce The power factor will be low Copper loss will reduce ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of rotor bars is generally ________ Prime number Equal to stator poles Even number None of the listed here Prime number Equal to stator poles Even number None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The approximate efficiency of a 3-phase , 50 Hz, 4 pole induction motor running at 1350 rpm is ______ 40% 65% None of the listed here 90% 40% 65% None of the listed here 90% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The 3- phase induction motor is so designed that the rotor should have ______ under running conditions. Large slip Low resistance high resistance High reactance Large slip Low resistance high resistance High reactance ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS