A. required to operate the circuit breaker
B. absorbed by the circuit of relay
C. developed by the relay circuit
D. none of the above
A. lengthening of the gap
B. cooling and blast effect
C. both (A) and (B)
D. deionizing the oil with forced air
E. none of the above
A. lengthening of the gap
B. cooling and blast effect
C. both A. and B
D. deionizing the oil with forced air
E. none of the above
A. the spring tension
B. the rate of flux built up
C. armature core air gap
D. all of the above
A. resistance, reactance or impedance
B. voltage and current
C. light intensity
D. temperature
E. all above
A. good selectivity and reliability
B. economy and simplicity
C. high speed and selectivity
D. all of the above
A. two currents
B. two voltages
C. two or more similar electrical quantities
D. none of the above
A. current during abnormal condition
B. voltage during abnormal condition
C. constantly the electrical quantities which differ during normal and abnormal conditions
D. none of the above
A. maintain the arc
B. extinguish the arc
C. transmit large power
D. emit the ionizing electrons
A. recovery
B. surge
C. operating
D. arc
E. none of the above