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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Which of the following materials is used for overhead transmission lines ?
Which of the following materials is used for overhead transmission lines ?
A. Steel cored aluminium
B. Galvanised steel
C. Cadmium copper
D. Any of the aboveThe voltage of the single phase supply to residential consumers is_____________?
The voltage of the single phase supply to residential consumers is_____________?
A. 110 V
B. 210 V
C. 230 V
D. 400 VWhich of the following bus-bar schemes has the lowest cost?
Which of the following bus-bar schemes has the lowest cost?
A. Ring bus-bar scheme
B. Single bus-bar scheme
C. Breaker and a half scheme
D. Main and transfer schemeMulticore cables generally use________________?
Multicore cables generally use________________?
A. square conductors
B. circular conductors
C. rectangular conductors
D. sector-shaped conductors
E. none of the aboveThe power transmitted will be maximum when____________?
The power transmitted will be maximum when____________?
A. corona losses are minimum
B. reactance is high
C. sending end voltage is more
D. receiving end voltage is moreElectro-mechanical voltage regulators are generally used in___________?
Electro-mechanical voltage regulators are generally used in___________?
A. reactors
B. generators
C. transformers
D. all of the above