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MCQs 1: A 3-phase 4 wire system is commonly used on________________?

primary transmission secondary transmission primary distribution secondary distribution
Answer Explanation

MCQs 2: There is a greater possibility of occurence of corona during______________?

dry weather winter summer heat humid weather none of the above
Answer Explanation

MCQs 3: Which of the following is not a constituent for making porcelain insulators ?

Quartz Kaolin Felspar Silica
Answer Explanation

MCQs 4: Which of the following materials is used for overhead transmission lines ?

Steel cored aluminium Galvanised steel Cadmium copper Any of the above
Answer Explanation

MCQs 5: The power transmitted will be maximum when____________?

corona losses are minimum reactance is high sending end voltage is more receiving end voltage is more
Answer Explanation

MCQs 6: A feeder, in a transmission system, feeds power to________________?

distributors generating stations service mains all of the above
Answer Explanation

MCQs 7: The presence of ozone due to corona is harmful because it________________?

reduces power factor corrodes the material gives odour transfer energy to the ground none of the above
Answer Explanation

MCQs 8: For an overhead line, the surge impedance is taken as________________?

20-30 ohms 70—80 ohms 100—200 ohms 500—1000 ohms none of the above
Answer Explanation

MCQs 9: Which of the following is usually not the generating voltage ?

6.6 kV 8.8 kV 11 kV 13.2 kV
Answer Explanation

MCQs 10: As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only__________________?

31.25 percent of copper 33.3 percent of copper 66.7 percent of copper 125 percent of copper
Answer Explanation

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