Explore topic-wise MCQs in Power Systems.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.

1.

A three phase transmission line is having a three unit suspension insulation string. The voltage at the insulator unit nearest to the line is 20kV and that across the adjacent unit is 15 kV. The ratio of mutual to ground capacitance is ________________

A. 0.18
B. 0.2
C. 0.333
D. 0.16
Answer» B. 0.2
Discussion
2.

A system consists of an alternator having reactance of 0.5pu connected to an infinite bus through a series of reactance of 1 pu. The generator terminal voltage of IBB is 1 pu and that of 1.2 pu. The emf induced in the alternator will have the phase difference with respect to reference for the maximum power transfer is _______________

A. 90
B. 0
C. 73.87
D. 86.25
Answer» B. 0
Discussion
3.

A system consists of an alternator having reactance of 0.5pu connectedto an infinite bus through a series of reactance of 1 pu. The generator terminal voltage of IBB is 1 pu and that of 1.2 pu.The emf induced in the alternator for the maximum power transfer will be __________

A. 1.729
B. 1.152
C. 1.2
D. 1.6
Answer» B. 1.152
Discussion
4.

A generator delivers power of 1 pu to an infinite bus through a purely reactive network. The maximum power that could be delivered by generator is 2 pu. A three phase fault occurs at the generator which reduces the generator output to zero. The fault is restored after tc seconds. The maximum swing of rotor angle is found to be max = 110o electrical. The rotor angle at tc is ________ electrical deg.

A. 69.14<sup>o</sup>
B. 159.14<sup>o</sup>
C. 63.08<sup>o</sup>
D. 65.7<sup>o</sup>
Answer» B. 159.14<sup>o</sup>
Discussion