EMJ42003 Chapter 7 - Quiz 2 - Set 1

What is an overvoltage?

• A voltage that is always safe

• A voltage that exceeds normal levels

• A constant voltage level

• A voltage below the normal level

Which type of overvoltage is caused by lightning discharges?

• Permanent overvoltage

• Temporary overvoltage

• External overvoltage

• Internal overvoltage

What does TOV stand for?

• Transient Overvoltage

• Temporary Overvoltage

• Tension Overvoltage

• Total Overvoltage

Which of the following is a cause of Slow Front Overvoltage (SFO)?

• Switching of inductive currents

• Load rejection

• Fault initiation

• All of the above

What is the primary purpose of a lightning arrester?

• To store energy

• To measure current

• To protect against lightning surges

• To increase voltage

What is the typical peak current for a first stroke of lightning?

• 10 kA

• 30 kA

• 100 kA

• 200 kA

What is the main effect of Temporary Overvoltage (TOV)?

• Increased efficiency

• Equipment damage

• Reduced power consumption

• Improved insulation

Which of the following is NOT a type of overvoltage classification?

• Very slow overvoltage

• Slow front overvoltage

• Fast front overvoltage

• Temporary overvoltage

What is the primary cause of Fast Front Overvoltage (FFO)?

• Load rejection

• Fault initiation

• Lightning strokes

• Switching operations

What is the effect of SFO on power system equipment?

• Improved performance

• Insulation stress

• Increased lifespan

• No effect