In a substation the following equipment is not installed?
In a substation the following equipment is not installed?
A. exciters
B. series capacitors
C. shunt reactors
D. voltatre transformers
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The frequency of voltage generated, in case of generators, can be increased by___________?
The frequency of voltage generated, in case of generators, can be increased by___________?
A. using reactors
B. increasing the load
C. adjusting the governor
D. reducing the terminal voltage
E. none of the abovejCorona usually occurs when the electrostatic stress in air around the conductor exceeds?
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds?
A. 6.6 kV (r.m.s. value)/cm
B. 11 kV (r.m.s. value)/cm
C. 22 kV (maximum value)/cm
D. 30 kV (maximum value)/cm_______________are the conductors, which connect the consumer’s terminals to the distribution?
_______________are the conductors, which connect the consumer’s terminals to the distribution?
A. Distributors
B. Service mains
C. Feeders
D. None of the aboveWhich of the following relays is used on long transmission lines?
Which of the following relays is used on long transmission lines?
A. Impedance relay
B. Mho’s relay
C. Reactance relay
D. None of the aboveA uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is______________?
A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is______________?
A. one-fourth
B. one-third
C. one-half
D. twice
E. none of the aboveThe wooden poles well impregnated with creosite oil or any preservative compound have life_____________?
The wooden poles well impregnated with creosite oil or any preservative compound have life_____________?
A. from 2 to 5 years
B. 10 to 15 years
C. 25 to 30 years
D. 60 to 70 years