Overhead lines generally use__________________?
Overhead lines generally use__________________?
A. copper conductors
B. all aluminium conductors
C. A.C.S.R. conductors
D. none of these
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The current drawn by the line due to corona losses is___________?
The current drawn by the line due to corona losses is___________?
A. non-sinusoidal
B. sinusoidal
C. triangular
D. squareWhich of the following bus-bar schemes has the lowest cost?
Which of the following bus-bar schemes has the lowest cost?
A. Ring bus-bar scheme
B. Single bus-bar scheme
C. Breaker and a half scheme
D. Main and transfer schemeThe operating voltage of supertension cables is up to_________________?
The operating voltage of supertension cables is up to_________________?
A. 3.3 kV
B. 6.6 kV
C. 11 kV
D. 33 kV_______________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 aboveWhen an alternator connected to the bus-bar is shut down the bus-bar voltage will___________?
When an alternator connected to the bus-bar is shut down the bus-bar voltage will___________?
A. fall
B. rise
C. remain unchanged
D. none of the aboveWhen a conductor carries more current on the surface as compared to core, it is due to___________?
When a conductor carries more current on the surface as compared to core, it is due to___________?
A. permeability variation
B. corona
C. skin effect
D. unsymmetrical fault
E. none of the above