Transformers Natural oil cooling is used for transformers upto a rating of 3000 kVA 250 kVA 500 kVA 1000 kVA 3000 kVA 250 kVA 500 kVA 1000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer the resistance between its primary and secondary is Zero Infinite 1000 ohms 1 ohm Zero Infinite 1000 ohms 1 ohm ANSWER DOWNLOAD EXAMIANS APP
Transformers When the secondary of a transformer is short circuited, the primary inductance _______ Is decreased Is increased None of the listed here Remians unchanged Is decreased Is increased None of the listed here Remians unchanged ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. 15-30% 3-5% 30-40% Above 40% 15-30% 3-5% 30-40% Above 40% ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer has full load copper loss of 400 W. The copper loss at half full load will be _____. 200 W 100 W None of the listed here 400 W 200 W 100 W None of the listed here 400 W ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Magnetising current is greatly increased Eddy current is increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Magnetising current is greatly increased Eddy current is increased Hysteresis loss is decreased Reluctance of magnetic path is decreased ANSWER DOWNLOAD EXAMIANS APP
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