Three Phase Induction Motors The shaft of an induction motor is made of Stainless steel Cast iron High speed steel Carbon steel Stainless steel Cast iron High speed steel Carbon steel ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The speed of a squirrel-cage induction motor can be controlled by all of the following except Changing winding resistance Reducing supply voltage Changing number of poles Changing supply frequency Changing winding resistance Reducing supply voltage Changing number of poles Changing supply frequency ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors At starting of a double squirrel cage induction motor _______ None of the listed here Outer cage winding has good pf Lower cage winding has low reactance Lower winding is more effective None of the listed here Outer cage winding has good pf Lower cage winding has low reactance Lower winding is more effective 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 ______ 90% None of the listed here 65% 40% 90% None of the listed here 65% 40% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage induction motor, the number of rotor bars is generally ________ Prime number None of the listed here Equal to stator poles Even number Prime number None of the listed here Equal to stator poles Even number 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 ______ Is decreased Remains unchanged None of the listed here Is increased Is decreased Remains unchanged None of the listed here Is increased ANSWER DOWNLOAD EXAMIANS APP
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