A. one-fourth
B. one-third
C. one-half
D. twice
E. none of the above
0
Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________?
0
Large industrial consumers are supplied electrical energy at__________________?
A. 25 percent
B. 50 percent
C. 75 percent
D. 100 percent
6
The spacing between phase conductors of a 220 kV line is approximately equal to________________?
A. 400 V
B. 11 kV
C. 66 kV
D. 400 kV
0
The minimum clearance between the ground and a 220 kV line is about_________________?
A. 2 m
B. 3.5 m
C. 6 m
D. 8.5 m
0
The material commonly used for sheaths of underground cables is______________?
A. 4.3 m
B. 5.5 m
C. 7.0 m
D. 10.5 m
0
The material generally used for armour of high voltage cables is_____________?
A. lead
B. rubber
C. copper
D. iron
0
In transmission lines the cross-arms are made of________________?
A. aluminium
B. steel
C. brass
D. copper
0
Overhead lines generally use__________________?
A. copper
B. wood
C. R.C.C.
D. steel
0
The power factor of industrial loads is generally______________?
A. copper conductors
B. all aluminium conductors
C. A.C.S.R. conductors
D. none of these
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