The 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 above
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By which of the following methods string efficiency can be improved?
By which of the following methods string efficiency can be improved?
A. Using a guard ring
B. Grading the insulator
C. Using long cross arm
D. Any of the above
E. None 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 VA 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 voltage drop, for constant voltage transmission is compensated by installing__________?
The voltage drop, for constant voltage transmission is compensated by installing__________?
A. inductors
B. capacitors
C. synchronous motors
D. all of above
E. none of the aboveIn aluminium conductors, steel core is provided to____________?
In aluminium conductors, steel core is provided to____________?
A. compensate for skin effect
B. neutralise proximity effect
C. reduce line inductance
D. increase the tensile strengthBy which of the following systems electric power may be transmitted ?
By which of the following systems electric power may be transmitted ?
A. Overhead system
B. Underground system
C. Both A. and (b)
D. None of the above