For an overhead line, the surge impedance is taken as________________?
For an overhead line, the surge impedance is taken as________________?
A. 20-30 ohms
B. 70—80 ohms
C. 100—200 ohms
D. 500—1000 ohms
E. none of the above
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The material commonly used for insulation in high voltage cables is_______________?
The material commonly used for insulation in high voltage cables is_______________?
A. lead
B. paper
C. rubber
D. none of the aboveThe operating voltage of high voltage cables is up to_______________?
The operating voltage of high voltage cables is up to_______________?
A. l.lkV
B. 3.3kV
C. 6.6kV
D. llkVFor which of the following equipment current rating is not necessary?
For which of the following equipment current rating is not necessary?
A. Circuit breakers
B. Isolators
C. Load break switch
D. Circuit breakers and load break switchesWhich of the following is usually not the generating voltage ?
Which of the following is usually not the generating voltage ?
A. 6.6 kV
B. 8.8 kV
C. 11 kV
D. 13.2 kVAs compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?
As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?
A. 31.25 percent of copper
B. 33.3 percent of copper
C. 66.7 percent of copper
D. 125 percent of copperWhen the interconnector between two stations has large reactance?
When the interconnector between two stations has large reactance?
A. the transfer of power will take place with voltage fluctuation and noise
B. the transfer of power will take place with least loss
C. the stations will fall out of step be¬cause of large angular displacement between the stations
D. none of the above