Lightning Arresters Quiz

What is the function of a lightning arrester?

• Diverts high-voltage surges to the ground.

• Increases voltage in electrical systems.

• Acts as a conductor during normal conditions.

• Prevents all electrical surges.

What are Metal-Oxide Varistors (MOV)?

• Devices that provide non-linear resistance.

• Components that increase voltage.

• Insulators used in electrical systems.

• Surge protectors for low-voltage equipment.

What is one advantage of using lightning arresters?

• They are cost-effective.

• They require frequent replacements.

• They are only used in substations.

• They increase maintenance needs.

What is the principle of operation of a lightning arrester?

• It acts as an insulator under normal conditions.

• It conducts electricity at all times.

• It only works during power outages.

• It increases resistance during surges.

What is the maximum speed of lightning?

• 220,000 km/h

• 300,000 km/h

• 150,000 km/h

• 100,000 km/h

What temperature can lightning reach?

• 30,000 °C

• 20,000 °C

• 10,000 °C

• 40,000 °C

What is the importance of lightning arresters?

• They prevent downtime and equipment damage.

• They increase the risk of electrical fires.

• They are only useful in rural areas.

• They are not necessary for modern equipment.

What is the role of surge protectors in electrical systems?

• They are used to enhance signal strength.

• They are only effective during thunderstorms.

• They increase the overall power consumption.

• They prevent voltage spikes from damaging equipment.

How do lightning arresters protect buildings?

• By preventing all forms of electricity.

• By redirecting lightning strikes safely to the ground.

• By absorbing all electrical energy.

• By increasing the building's height.

What is the typical lifespan of a lightning arrester?

• 10-15 years.

• 1-2 years.

• 5-7 years.

• 20-25 years.