Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 50Hz 2HZ 2.5Hz 1 Hz 50Hz 2HZ 2.5Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Over-excitation. Periodic variation of load. Small and constant load. Over-loading for long period. Over-excitation. Periodic variation of load. Small and constant load. Over-loading for long period. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Pole changing methods are suitable only for ___________ type induction motor. cage. wound. none of these. linear. cage. wound. none of these. linear. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called crawling. slip. skewing. cogging. crawling. slip. skewing. cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of 3 - Φ IM, plugging means starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. pulling the motor directly on line without a rotor. locking of rotor due to harmonics. starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. pulling the motor directly on line without a rotor. locking of rotor due to harmonics. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an alternator, voltage drops occurs in armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance, leakage reactance, armature reaction and earth connection. armature resistance only. armature resistance, leakage reactance and armature reaction. armature resistance and leakage reactance. armature resistance, leakage reactance, armature reaction and earth connection. armature resistance only. ANSWER DOWNLOAD EXAMIANS APP
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