Three Phase Induction Motors The shape of the torque/slip curve of induction motor is Hyperbola Parabola Straight line Rectangular parabola Hyperbola Parabola Straight line Rectangular parabola ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors An induction motor is preferred to a dc motor because it _______ Has simple and rugged construction Provides fine speed control Provides high starting torque None of the listed here Has simple and rugged construction Provides fine speed control Provides high starting torque None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The air gap between stator and rotor of 3-phase induction motor ranges from ______ 2 cm to 4 cm 0.4 mm to 4 mm 4 cm to 6 cm 1 cm to 2 cm 2 cm to 4 cm 0.4 mm to 4 mm 4 cm to 6 cm 1 cm to 2 cm 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 _____ 50 Hz 25 Hz 60 Hz None of the listed here 50 Hz 25 Hz 60 Hz None of the listed here 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 None of these Squirrel cage as well as slip ring induction motor Slip ring motor only but not with squirrel cage induction motor Squirrel cage induction motor only but not with slip ring motor None of these Squirrel cage as well as slip ring induction motor Slip ring motor only but not with squirrel cage induction motor ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors The injected e.m.f. in the rotor of induction motor must have 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 High value for the satisfactory speed control Zero frequency The same phase as the rotor e.m.f. ANSWER DOWNLOAD EXAMIANS APP
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