Three Phase Induction Motors One of the speeds of a 2 speed squirrel cage induction motor is 800 rpm. The other speed will be _____ 1200 rpm 400 rpm 2400 rpm 1600 rpm 1200 rpm 400 rpm 2400 rpm 1600 rpm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Insertion of resistance in the rotor of an induction motor to develop a given torque Increases the rotor current Decreases the rotor current Rotor current remains same Rotor current becomes zero Increases the rotor current Decreases the rotor current Rotor current remains same Rotor current becomes zero ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 1 cm to 2 cm 2 cm to 4 cm 4 cm to 6 cm 0.4 mm to 4 mm 1 cm to 2 cm 2 cm to 4 cm 4 cm to 6 cm 0.4 mm to 4 mm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors If the rotor slots are made deeper, rotor resistance is ______ None of the listed here Increased at starting Increased under running conditions Decreased at starting None of the listed here Increased at starting Increased under running conditions Decreased at starting ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. The same frequency as the slip frequency 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 _____ 25 Hz 60 Hz None of the listed here 50 Hz 25 Hz 60 Hz None of the listed here 50 Hz ANSWER DOWNLOAD EXAMIANS APP
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