310 km line is considered as_______________?
310 km line is considered as_______________?
A. a long line
B. a medium line
C. a short line
D. any of the above
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Which of the following D.C. distribution system is the simplest and lowest in first cost ?
Which of the following D.C. distribution system is the simplest and lowest in first cost ?
A. Radial system
B. Ring system
C. Inter-connected system
D. None of the aboveIn 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. steelConstant voltage transmission entails the following disadvantage?
Constant voltage transmission entails the following disadvantage?
A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the aboveFor aluminium, as compared to copper, all the following factors have higher values except:
For aluminium, as compared to copper, all the following factors have higher values except:
A. specific volume
B. electrical conductivity
C. co-efficient of linear expansion
D. resistance per unit length for same cross-sectionPin type insulators are generally not used for voltages beyond_________?
type insulators are generally not used for voltages beyond_________?
A. 1 kV
B. 11 kV
C. 22 kV
D. 33 kVMost of the high transmission lines in Pakistan are_______________?
Most of the high transmission lines in Pakistan are_______________?A. underground
B. overhead
C. either of the above
D. none of the above