Three Phase Induction Motors A 3 phase induction motor is ________ Essentially a constant speed motor Very costly Not easily maintainable A variable speed motor Essentially a constant speed motor Very costly Not easily maintainable A variable speed motor 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% None of the listed here 90% 40% 65% None of the listed here 90% 40% ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 4 cm to 6 cm 1 cm to 2 cm 0.4 mm to 4 mm 2 cm to 4 cm 4 cm to 6 cm 1 cm to 2 cm 0.4 mm to 4 mm 2 cm to 4 cm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When a 3-phase induction motor is at no load, the slip is ______ Practically zero 0.5 1 0.2 Practically zero 0.5 1 0.2 ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The torque developed by a 3 phase induction motor least depends on Shaft diameter Rotor power factor Rotor emf Rotor current Shaft diameter Rotor power factor Rotor emf Rotor current ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Size of a high speed motor as compared to low speed motor for the same HP will be Smaller Same Bigger Any of the listed here Smaller Same Bigger Any of the listed here ANSWER DOWNLOAD EXAMIANS APP
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