Electrical Machines A generator may loose residual magnetism due to vibrations. heating. any of these. over excitation. vibrations. heating. any of these. over excitation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 0.4. 0.6. 0.8. 1. 0.4. 0.6. 0.8. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to 350 V. 420 V. 480 V. 400 V. 350 V. 420 V. 480 V. 400 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer zero voltage regulation is achieved at a load power factor which is unity lagging leading zero unity lagging leading zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Counter emf of a DC motor regulates its armature voltage. aids applied voltage. exceeds supply voltage helps in energy conversion. regulates its armature voltage. aids applied voltage. exceeds supply voltage helps in energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC motors has almost constant speed over their full load range? Compound (cummolative). none of these. Shunt. Series. Compound (cummolative). none of these. Shunt. Series. ANSWER DOWNLOAD EXAMIANS APP
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