# Electrical Engineering Questions And Answers :: Power Systems: part4

Electrical Engineering : Power Systems QUESTIONS AND ANSWERS :: part4 : 1 to 5

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2021 and IES 2021 examinations :

 1.An alternator has a phase sequence of RYB for itB phase voltage. In case offield current is reversed, the phase sequence will become RBY RYB YRB none of these ANSWER : : RYB Explanation :
 2.Pure inductive circuit takes power (reactive) from the a.c. line when both applied voltage and current rise both applied voltage anti current decrease applied voltage decreases but current Increases none of these ANSWER : : both applied voltage anti current decrease Explanation :
 3.The insulation of modern EHV lines is designed based on the lightning voltage corona radio interface switching voltage ANSWER : : switching voltage Explanation :
 4.With the help of a reactive compensator it is possible to have (u) constant voltage opei ation only unity p.f. operation only both constant voltage and unity p.f. either constant voltage or unity p.f. either constant voltage or unity p.f. ANSWER : For a long uncompensated line the limit to the line loading is governed by Explanation :
 5.At a particular unbalanced node, the real powers specified are Leaving the node : 20 Mw, 25 Mw, Entering the node: 60 Mw, 30 MW. The balance power will be 30 MW leaving the node 45 MW leaving the node 45 MW entering the node 22.5MW entering the node and 22.5 MW leaving the node ANSWER : : 45 MW leaving the node Explanation :

More Power Systems QUESTIONS AND ANSWERS available in next pages

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