The following system is not generally used?
The following system is not generally used?
A. 1-phase 3 wire
B. 1-phase 4 wire
C. 3-phase 3 wire
D. 3-phase 4 wire
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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. steelHigh voltage transmission lines use__________________?
High voltage transmission lines use__________________?
A. suspension insulators
B. insulators
C. both A. and B.
D. none of the aboveThe spacing between phase conductors of a 220 kV line is approximately equal to________________?
The spacing between phase conductors of a 220 kV line is approximately equal to________________?
A. 2 m
B. 3.5 m
C. 6 m
D. 8.5 mThere is a greater possibility of occurence of corona during______________?
There is a greater possibility of occurence of corona during______________?
A. dry weather
B. winter
C. summer heat
D. humid weather
E. none of the aboveLarge industrial consumers are supplied electrical energy at__________________?
Large industrial consumers are supplied electrical energy at__________________?A. 400 V
B. 11 kV
C. 66 kV
D. 400 kVGalvanised 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 above