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.Management Sciences
Category: Transmission and Distribution
In aluminium conductors, steel core is provided to____________?
0
A. compensate for skin effect
B. neutralise proximity effect
C. reduce line inductance
D. increase the tensile strength
The operating voltage of supertension cables is up to_________________?
A. 3.3 kV
B. 6.6 kV
C. 11 kV
D. 33 kV
Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
A. Circulating current method
B. Thevenin’s theorem
C. Superposition of currents
D. Direct application of Kirehhoffs laws
E. All of the above
In the analysis of which of the following lines shunt capacitance is neglected?
A. Short transmission lines
B. Medium transmission lines
C. Long transmission lines
D. Medium as well as long transmission lines
Which of the following distribution systems is more reliable?
A. Radial system
B. Tree system
C. Ring main system
D. All are equally reliable
In a substation the following equipment is not installed?
A. exciters
B. series capacitors
C. shunt reactors
D. voltatre transformers
Overhead system can be designed for operation up to____________?
A. 11 kV
B. 33 kV
C. 66 kV
D. 400 kV
Which of the following materials is not used for transmission and distribution of electrical power________________?
A. Copper
B. Aluminium
C. Steel
D. Tungsten
In transmission lines the cross-arms are made of________________?
A. copper
B. wood
C. R.C.C.
D. steel
Large industrial consumers are supplied electrical energy at__________________?
A. 400 V
B. 11 kV
C. 66 kV
D. 400 kV
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