Electrical Engineering Questions And Answers :: Power Systems: part2



Electrical Engineering : Power Systems QUESTIONS AND ANSWERS :: part2 : 21 to 25

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

21.For an existing ac transmision line, the string efficiency is 80%, if dc voltage is supplied for the same set up, the string efficiency will be

< 80%
80%
90%
100%

22."Expanded ACSR" are conductors composed of

larger diameter individual strands for a given cross-section of the aluminium strangs
larger diameter of a central steel strands for a given overall diameter of the conductor
larger diamter of the aluminium strands only for a given overall diameter of the conductor
a fillter between the inner steel and the outer aluminium strands to increase the overall diameter of the conductor

23.A conductor is composed of seven identical copper .Iranu, each having a radius r. The self GMD of the conductors will be

2.177 r
2.645 r
2.141 r
1.21 r

24.What is the sag for a span of 400m, if the ultimate tensile strength of conductor is 6000 kgf, and the weight of conductor is 550 kgf/km? Factor of safety is 2.

1.016 m
2.40 m
3.6 m
4.2 m

More Power Systems QUESTIONS AND ANSWERS available in next pages

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