a) Thermal emission b) Alternators c) Field emission d) Transmission lines Ans: (d)
a) 4 kV b) 25 kV c) 10 kV d) 36 kV Ans: (d)
a) Current carrying contacts called electrodes b) Arc extinguishers c) Transformers to isolate two systems d) Circuits to break the system Ans: (a)
a) Restriking voltage b) Supply voltage c) Recovery voltage d) None of these Ans: (c)
a) Bulk oil circuit breaker b) Minimum oil circuit breaker c) Air blast circuit breaker d) SF6 circuit breaker Ans: (d)
a) Circuit power factor only b) Switching condition only c) Both (a) and (b) above d) None of these Ans: (c)
a) Aluminium b) Electrolytic c) Copper tungsten alloy d) Tungsten Ans: (c)
a) Circuit breakers b) Fast switches c) Relays d) Fuses Ans: (b)
a) Air b) Oil c) Water d) None of these Ans: (a)
a) Air break circuit breaker b) Air blast circuit breaker c) Bulk oil circuit breaker d) SF6 circuit breaker Ans: (c)
MCQ of Transformer page-20:91. All day efficiency of a distribution transformer is ………. its commercial efficiency.
MCQ of Transformer page-19:81. Which of the following is not a fitting on the transformer ?
MCQ of Transformer page-18:71. The short circuit test on a transformer gives its