Explore topic-wise MCQs in Power Systems.

This section includes 10 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.

THE_CORONA_LOSS_ON_A_PARTICULAR_SYSTEM_AT_50_HZ_IS_1_KW/PHASE_PER_KM._THE_CORONA_LOSS_ON_THE_SAME_SYSTEM_IN_CASE_OF_DC_TRANSMISSION_WILL_BE_____________?$

A. Zero
B. 0.5 kW/phase/km
C. 0.33 kW/phase/km
D. 0.6 kW/phase/km
Answer» D. 0.6 kW/phase/km
Discussion
2.

IT_IS_REQUIRED_TO_IMPLEMENT_THE_HVDC_SYSTEM_USING_THE_THYRISTORS_IN_LARGE_NUMBERS._WHY_IT_BECOMES_NECESSARY_TO_USE_A_LARGE_NUMBER_OF_THYRISTOR_SWITCHES??$

A. Due to low voltage rating of thyristor switches
B. Due to low current rating of thyristor switches
C. Due to lack of response for open circuit fault
D. Cannot be determined
Answer» B. Due to low current rating of thyristor switches
Discussion
3.

What of the below mentioned statements are incorrect as compared to the HVDC system?

A. Back to back connection is possible
B. More corona losses
C. Distance limitation
D. Extra reactive power compensation
Answer» C. Distance limitation
Discussion
4.

As compared to the HVDC line, the corona and radio interference in a HVAC line are ____

A. more
B. lesser
C. same
D. cannot be determined
Answer» B. lesser
Discussion
5.

The reactive power demand of the converters in HVDC can be provided by ___________

A. AC filters
B. Shunt Capacitors
C. SVC
D. AC Filters, Shunt Capacitors and SVC
Answer» E.
Discussion
6.

(i) Low short circuit current is required in dc system

A. Fast control of the converter switches cannot effectively control the damping of the oscillations.
B.
C. (i) and (ii) both are true
Answer» C. (i) and (ii) both are true
Discussion
7.

DC line transmission can be used to provide _______ link.

A. asynchronous
B. synchronous
C. lossless
D. none of the mentioned
Answer» B. synchronous
Discussion
8.

Steady state problem is not very serious problem in dc transmission line system due to which of the following systems?

A. No reactive compensation
B. Only resistance drop
C. Stable voltage regulation
D. No reactive compensation, resistance drop, voltage regulation
Answer» B. Only resistance drop
Discussion
9.

The amount of dc compensation needed by a 400 kV dc line for transmitting the data over 300 km having resistance as 5 ohms?

A. 400 var
B. 564 var
C. 600 VAR
D. None of the mentioned
Answer» B. 564 var
Discussion
10.

Which of the system would require more insulation, a 400 kV ac line or 400 kV dc line?

A. 400 kV ac
B. 400 kV dc
C. Both will need same level of insulation
D. Data is insufficient to decide
Answer» B. 400 kV dc
Discussion