BEE Power System 2

Question 1

What is the purpose of a surge arrester in a power system?

Accepted Answer

To protect equipment from transient overvoltages

Answer

Surge arresters clamp transient overvoltages caused by lightning or switching surges, protecting insulation of connected equipment.

Question 2

Which fault type is the most common in overhead transmission lines?

Accepted Answer

Single line-to-ground fault

Answer

Single line-to-ground faults account for approximately 70–80% of all faults on overhead transmission lines due to insulator flashovers or conductor contact with ground.

Question 3

What does the term 'infinite bus' represent in power system analysis?

Accepted Answer

A bus with constant voltage and frequency regardless of load

Answer

An infinite bus is an idealized source with constant voltage magnitude and frequency, used as a reference in stability studies.

Question 4

The Ferranti effect in a transmission line occurs when:

Accepted Answer

The line is lightly loaded or open-circuited at the receiving end

Answer

Under light or no-load conditions, the charging current of the line causes the receiving-end voltage to exceed the sending-end voltage.

Question 5

In a power system, the term 'spinning reserve' refers to:

Accepted Answer

Generating capacity online and synchronized but not fully loaded

Answer

Spinning reserve is online generating capacity that can immediately respond to sudden load increases or generation loss.

BEE - Bachelor of Electrical Engineering Practice Test

BEE - Bachelor of Electrical Engineering Practice Test

BEE Power System 2