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 22 kV, 400 MVA generator has the reactance of 0.3 pu. The value of reactance on the new base of 25 kV and 200 MVA will be:

A. 0.116 pu
B. 032 pu
C. 0.58 pu
D. 0.232 pu
Answer» B. 032 pu
Discussion
2.

Consider the following balanced line-to-line voltages with abc sequence:\({V_P} = \left[ {\begin{array}{*{20}{c}} {{V_{an}}}\\ {{V_{bn}}}\\ {{V_{cn}}} \end{array}} \right] = \left[ {\begin{array}{*{20}{c}} {277\angle 0^\circ }\\ {277\angle - 120^\circ }\\ {277\angle 120^\circ } \end{array}} \right]\) voltsThe values of V0, V1 and V2 are respectively

A. 0, 177∠0° and 177∠0°
B. 277∠0°, 0 and 0
C. 0, 277∠0° and 0
D. 277∠0°, 0 and 177∠0°
Answer» D. 277∠0°, 0 and 177∠0°
Discussion
3.

Consider the single line diagram shown in figure below. If the base voltage is selected on the generator terminal as 10 kV, what will be the base voltage of transmission line?

A. 10 kV
B. 11 kV
C. 120 kV
D. 132 kV
Answer» D. 132 kV
Discussion
4.

In case of an unbalanced star-connected load supplied from an unbalanced 3-phase 3-wire system, load current will consist of:

A. only +ve sequence component
B. only –ve sequence component
C. only zero sequence component
D. both +ve and –ve sequence component
Answer» E.
Discussion