Which 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 scheme
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A feeder, in a transmission system, feeds power to________________?
A feeder, in a transmission system, feeds power to________________?
A. distributors
B. generating stations
C. service mains
D. all of the aboveThe 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. squareAluminium has a specific gravity of___________?
Aluminium has a specific gravity of___________?
A. 1.5
B. 2.7
C. 4.2
D. 7.8Galvanised steel wire is generally used as______________?
Galvanised steel wire is generally used as______________?
A. stay wire
B. earth wire
C. structural components
D. all 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)/cmIn a tap changing transformer, the tappings are provided on__________?
In a tap changing transformer, the tapgs are provided on__________?
A. primary winding
B. secondary winding
C. high voltage winding
D. any of the above