You have completed the syllabus of the SSC JE exam for Power Systems. Now BYJU'S Exam Prep brings you the 100 most important questions of the Power Systems.
Here you will find the 100 most important questions for the Power Systems subject of the Electrical Engineering syllabus. The top 5 questions are attached here rest questions you can find in the below pdf.
1. Reactive power compensation is applied at the mid-point of transmission line such that
voltage at both ends is maintained at 1 p.u. Voltage at mid-point is maintained at 0.96 p.u.
If total reactance of the line is 0.2 p.u., then the steady state power transfer limit of the
transmission line is
A. 9.6 p.u. B. 4.8 p.u.
C. 19.2 p.u. D. 2.4 p.u.
2. In case of high voltage overhead transmission lines mainly bundled conductors are used
because it ?
A. reduce sag
B. reduce corona
C. increase mechanical strength of the line
D. reduce transmission line losses
3. AC resistance is more than dc resistance due to which of the following effect.
i. skin effect ii. proximity effect
iii. ferrant effect
A. (i) and (ii) only B. (i) only
C. (ii) only D. (i), (ii) and (iii)
4.Consider two synchronous generators defined by
P1 = 100(50 – f) in MW
P2 = 50(51 – f) in MW
Where, f is _______Hz if total load is 500 MW. (Consider system to be lossless)
A. 46 B. 47
C. 48 D. 50
5. When a voltage-controlled bus is operating at the maximum limit of reactive power. Then
what is the type of that bus?
A. PV Bus B. PQ Bus
C. Slack Bus D. None of the above