Electrical Machines The main disadvantage(s) of the ward-Leonard system is/are high maintenance cost. poor overall efficiency. all of above. high initial cost. high maintenance cost. poor overall efficiency. all of above. high initial cost. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For successful parallel operation of two single phase transformers, the most essential condition is that their turn- ratios are exactly equal KVA ratings are equal percentage impedances are equal polarities are properly connected turn- ratios are exactly equal KVA ratings are equal percentage impedances are equal polarities are properly connected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under operating conditions the rotor conductor should be _________________ in induction motor. always closed. always opened. semi closed or semi opened. none. always closed. always opened. semi closed or semi opened. none. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lap winding is prefered for which type of machines? high current and high voltage high current and low voltage low current and high voltage low current and low voltage high current and high voltage high current and low voltage low current and high voltage low current and low voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 28 W. 30 W. 36 W. 25 W. 28 W. 30 W. 36 W. 25 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine is in the same direction as the main poles. is in direct opposition to the main poles. makes an angle of 90° with the main pole axis. makes an angle with the main pole axis which is load dependent. is in the same direction as the main poles. is in direct opposition to the main poles. makes an angle of 90° with the main pole axis. makes an angle with the main pole axis which is load dependent. ANSWER DOWNLOAD EXAMIANS APP
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