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

none of these

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

3.The insulation of modern EHV lines is designed based on

the lightning voltage
radio interface
switching voltage

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.

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

More Power Systems QUESTIONS AND ANSWERS available in next pages

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