Transformers The maximum efficiency of a distribution transformer is at full load at no load at 50% full load at 80% full load at full load at no load at 50% full load at 80% full load ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the approximate efficiency of large transformers? 75% 95 % 65% 85% 75% 95 % 65% 85% ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following 3 phase connections of transformer create disturbances in communication systems Delta/Delta Delta/Star Star/Delta Star/Star Delta/Delta Delta/Star Star/Delta Star/Star ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary of a transformer are ______ coupled. Electrically Electrically and magnetically None of the listed here Magnetically Electrically Electrically and magnetically None of the listed here Magnetically ANSWER DOWNLOAD EXAMIANS APP
Transformers The open circuit test on a transformer gives _______ Copper losses Friction losses Iron losses Total losses Copper losses Friction losses Iron losses Total losses ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of more than 15 A less than 15 A 15 A None of these more than 15 A less than 15 A 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
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