Electrical Machines A transformer has resistance and reactance in per unit as 0.01 and 0.04 respectively. Its voltage regulation for 0.8 power factor lagging and leading will be 3.2% and -1.6% 6% and -4% 4.8% and -3.2% None of these 3.2% and -1.6% 6% and -4% 4.8% and -3.2% None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The material used for commutator brushes is mostly cast iron. mica. carbon. copper. cast iron. mica. carbon. copper. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For successful parallel operation of two single phase transformers, the most essential condition is that their polarities are properly connected turn- ratios are exactly equal percentage impedances are equal KVA ratings are equal polarities are properly connected turn- ratios are exactly equal percentage impedances are equal KVA ratings are equal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is very effective for separately excited motors. shunt motors. series motors. differential compound motors. separately excited motors. shunt motors. series motors. differential compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is reduced, the power factor is None of these unity power factor leading power factor lagging power factor None of these unity power factor leading power factor lagging power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become 4 times. double. one fourth. half. 4 times. double. one fourth. half. ANSWER DOWNLOAD EXAMIANS APP
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