Three Phase Induction Motors The starting torque of a 3-phase induction motor is _______ supply voltage. None of the listed here Directly proportional to sqaure of Directly proportional to Independent of None of the listed here Directly proportional to sqaure of Directly proportional to Independent of 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 increased None of the listed here Is decreased Remains unchanged Is increased None of the listed here Is decreased Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Insertion of resistance in the rotor of an induction motor to develop a given torque Rotor current becomes zero Increases the rotor current Rotor current remains same Decreases the rotor current Rotor current becomes zero Increases the rotor current Rotor current remains same Decreases the rotor current 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 ______ 65% 40% None of the listed here 90% 65% 40% None of the listed here 90% 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 2880 rpm 1000 rpm 730 rpm 1440 rpm 2880 rpm 1000 rpm 730 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In medium sized induction motor, the slip is generally around 0.4 % 14% 0.04 % 4 % 0.4 % 14% 0.04 % 4 % ANSWER DOWNLOAD EXAMIANS APP
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