In transmission lines the cross-arms are made of________________?
In transmission lines the cross-arms are made of________________?
A. copper
B. wood
C. R.C.C.
D. steel
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Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical?
A. Static condenser
B. Synchronous condenser
C. Tap changing transformer
D. Booster transformerThe effect of corona can be detected by___________?
The effect of corona can be detected by___________?
A. presence of ozone detected by odour
B. hissing sound
C. faint luminous glow of bluish colour
D. all of the aboveThe distributors for residential areas are______________?
The distributors for residential areas are______________?
A. single phase
B. three-phase three wire
C. three-phase four wire
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 angular displacement between two interconnected stations is mainly due to___________?
The angular displacement between two interconnected stations is mainly due to___________?
A. armature reactance of both alternators
B. reactance of the interconnector
C. synchronous reactance of both the alternators
D. all of the aboveThe underground system cannot be operated above_________________?
The underground system cannot be operated above_________________?
A. 440 V
B. 11 kV
C. 33 kV
D. 66 kV