A circuit is disconnected by isolators when____________?
A circuit is disconnected by isolators when____________?
A. line is energized
B. there is no current in the line
C. line is on full load
D. circuit breaker is not open
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Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
A. Circulating current method
B. Thevenin’s theorem
C. Superposition of currents
D. Direct application of Kirehhoffs laws
E. All of the above310 km line is considered as_______________?
310 km line is considered as_______________?
A. a long line
B. a medium line
C. a short line
D. any of the aboveThe voltage regulation in magnetic amplifier type voltage regulator is effected by__________?
The voltage regulation in magnetic amplifier type voltage regulator is effected by__________?
A. electromagnetic induction
B. varying the resistance
C. varying the reactance
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Which of the following characteristics should the line supports for transmission lines possess?
A. Low cost
B. High mechanical strength
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In a substation the following equipment is not installed?
A. exciters
B. series capacitors
C. shunt reactors
D. voltatre transformersWhich of the following are the constants of the transmission lines ?
Which of the following are the constants of the transmission lines ?
A. Resistance
B. Inductance
C. Capacitance
D. All of the above