A. underground
B. overhead
C. either of the above
D. none of the above
The operating voltage of high voltage cables is up to_______________?
A. l.lkV
B. 3.3kV
C. 6.6kV
D. llkV
Which of the following is not a constituent for making porcelain insulators ?
A. Quartz
B. Kaolin
C. Felspar
D. Silica
Which of the following methods is used for laying of underground cables ?
A. Direct laying
B. Draw-in-system
C. Solid system
D. All of the above
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 above
The voltage regulation in magnetic amplifier type voltage regulator is effected by__________?
A. electromagnetic induction
B. varying the resistance
C. varying the reactance
D. variable transformer
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 above