Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 40 HZ 50 Hz 60 Hz 25 Hz 40 HZ 50 Hz 60 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Pole changing methods are suitable only for ___________ type induction motor. linear. none of these. cage. wound. linear. none of these. cage. wound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of an induction motor operating at no load will have a value around 0.2 lag 0.2 lead unity 0.9 lag 0.2 lag 0.2 lead unity 0.9 lag ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field weakening method is also called as-----------? constant voltage control constant torque control constant power control constant current control constant voltage control constant torque control constant power control constant current control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following motor is preferred for belt conveyor? Synchronous motors. Slip ring induction motor. Universal motor. Reluctance motor. Synchronous motors. Slip ring induction motor. Universal motor. Reluctance motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. ANSWER DOWNLOAD EXAMIANS APP
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