Explore topic-wise MCQs in Power Systems.

This section includes 9 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.

For the circuit diagram as depicted in the figure, the current per phase under balanced condition with a consumer end load of 90 kW, 414V operating at a power factor of 0.65 is ___________

A. 157.66 A
B. 152 A
C. 111.4 A
D. 193.1 A
Answer» B. 152 A
Discussion
2.

The maximum rms voltage between one phase and ground neutral for a three phase 4-wire ac system will be ___________________

A. 171.46 kV
B. 242.5 kV
C. 221 kV
D. 127 kV
Answer» B. 242.5 kV
Discussion
3.

The maximum rms voltage between one phase and ground neutral for a three phase 4-wire ac system will be ____________

A. 221.32 kV
B. 313 kV
C. 442 kV
D. 127 kV
Answer» B. 313 kV
Discussion
4.

For a 2-wire ac single phase distribution system operating at 30 MW and 315 kV, operating at the power factor of 0.8 having 15 of resistance of each wire, then the power received at the consumer end will be ____________

A. 29.79 MW
B. 29.895 MW
C. 29.76 MW
D. 29 MW
Answer» B. 29.895 MW
Discussion
5.

For a 2-wire ac single phase distribution system operating at 30 MW and 315 kV, operating at the power factor of 0.8 having 15 of resistance of each wire, then the copper loss at the substation in kW will be ___________

A. 210.67
B. 105.33
C. 240.87
D. 108.27
Answer» B. 105.33
Discussion
6.

If a 2-wire ac single phase distribution system operating at 30 MW and 315 kV, operating at the power factor of 0.8, then the current in the outer wire in kA is _____

A. 0.0838
B. 83.8
C. 8.38
D. 1.131
Answer» B. 83.8
Discussion
7.

If a 2-wire ac single phase distribution system operating at P MW and V kV, operating at the power factor of 0.8, then the current in the outer wire in kA is ______

A. 0.8P/V
B. 1.131P/V
C. 1.88P/V
D. 0.088P/V
Answer» B. 1.131P/V
Discussion
8.

For the given circuit diagram for the substation fed with 315 kV, the voltage between the two outer conductors is ____________

A. 445.5 kV
B. 890 kV
C. 630 kV
D. 223 kV
Answer» B. 890 kV
Discussion
9.

For the given circuit diagram for the substation the voltage between the two outer conductors is
__________

A. n<a href="https://www.sanfoundry.com/wp-content/uploads/2018/05/power-systems-questions-answers-aptitude-test-q1.png"><img alt="The substation voltage between the two outer conductors is 2 V for figure" class="alignnone size-full wp-image-212760" height="118" src="https://www.sanfoundry.com/wp-content/uploads/2018/05/power-systems-questions-answers-aptitude-test-q1.png" width="80"/></a>
Answer» C.
Discussion