a) Very high restriking voltage b) Very high current c) Rupture of circuit breaker d) Current chopping Ans: (d)
a) Restriking voltage b) Rate of rise restriking voltage c) Power factor d) Frequency Ans: (c)
a) Resistance switching b) Inductive switching c) Capacitive switching d) Diode switching Ans: (a)
a) Restriking voltage b) Final arc distinction c) Rise of voltage d) All of these Ans: (b)
a) Opening time b) Closing time c) Arching time d) Decaying time Ans: (a)
a) Fuse b) Circuit breaker c) Relay d) None of these Ans: (d)
a) Circuit voltage b) Magnitude of the current c) Electrical constants of the circuit d) None of these Ans: (c)
a) Arc is produced b) Voltage rises c) Breaker fails d) Arc chamber is broken Ans: (a)
a) Very high voltage b) Very low voltage c) Medium voltage d) Medium and low voltage Ans: (d)
a) Decrease in voltage b) Increase in voltage c) Pressure of arc d) Mechanical stresses Ans: (b)
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