Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 0.4 mm to 4 mm 4 cm to 6 cm 2 cm to 4 cm 1 cm to 2 cm 0.4 mm to 4 mm 4 cm to 6 cm 2 cm to 4 cm 1 cm to 2 cm ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Reduced voltage starter can be used with Squirrel cage induction motor only but not with slip ring motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage as well as slip ring induction motor None of these Squirrel cage induction motor only but not with slip ring motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage as well as slip ring induction motor None of these ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a double squirrel cage induction motor, the outer cage winding has _______ High inductance None of the listed here High resistance Low resistance High inductance None of the listed here High resistance Low resistance ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A 3 phase 440 v, 50 Hz induction motor has 4% slip. The frequency of rotor emf will be 50 Hz 200 Hz 20 Hz 2 Hz 50 Hz 200 Hz 20 Hz 2 Hz 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 The same frequency as the slip frequency Zero frequency The same phase as the rotor e.m.f. High value for the satisfactory speed control The same frequency as the slip frequency Zero frequency The same phase as the rotor e.m.f. ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Very large 3-phase induction motors (greater than 25 HP) are started _____ Direct on line By auto transformer starting Star-delta starting None of the listed here Direct on line By auto transformer starting Star-delta starting None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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