# Electrical Engineering Questions And Answers :: Power Systems: part2

Electrical Engineering : Power Systems QUESTIONS AND ANSWERS :: part2 : 6 to 10

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

 6.A transmission line conductor at a river crossing is supported from two towers at height. of 30 m and 90m, above water level. The horizontal distance between the towers is 270m, if the tension in the conductor is 1800 kg and the conductor weight 1 kg/m. What is the clearance between the conductor and the water at a point midway between the towers? 79.50 m 54.94 m 60 m 51.4 m ANSWER : : 54.94 m Explanation :
 7.A transmission line haB a span of 275 m between level supporte. The conductor has a diameter of 19.58 mm, weight 0.844 kgpm and has an ultimate breaking strength of 7950 kgf. Each conductor has a radial covering of ice 9.58 mm thick and is subjected to a horizontal wind pressure of 40 k617m2 of ice covering projected area. If the factor of safety is 2, what is the deflected sag? Ice weight is 913.5 kg/m3 5.36 4.1 m 3.9 m 3.01 m ANSWER : : 5.36 Explanation :
 8.The line conductor of a transmission line has an overall diameter of 19.53 mm, weight 0.844 kg/m and an ultimate breaking strength of 7950 kg. If the factor of safety is to be 2, when conductor has an ice of 1 kg/m and a horizontal wind pressure of 1.5 kg/m. What is the vertical sag, corresponding to this loading for a 300 m span level supports? 1.08 m 5.0 m 5.22 m 4.62 m ANSWER : : 5.22 m Explanation :
 9.A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows: A - B = 3m, B - C = 5m, C - A = 3.6m If the line operates at 132 k V, the reactive voltampere generatd by the line per km is 51.07 kVAr 51.70 kVAr 40.0 kVAr 60.5 kVAr ANSWER : : 51.70 kVAr Explanation :
 10.A two conductor 1 - pi line operates at 50 Hz. The diameter of each conductor is 2 cm and are spaced 3m apart. What is the line to line capacitance 9.74 x 10-9 F/km 4.87 x 10-9 F/km 3.05 x 10-9 F/km None of these ANSWER : : 4.87 x 10-9 F/km Explanation :

More Power Systems QUESTIONS AND ANSWERS available in next pages

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