UNIT I Lightning

What is the primary cause of lightning-induced overvoltages in power systems?

• a) High demand for electricity

• b) Faulty power system equipment

• c) Lightning strikes

• d) Power system switching operations

Which of the following is an effect of lightning-induced overvoltages in power systems?

• a) Increased power system stability

• b) Decreased power system losses

• c) Equipment damage and failures

• d) Improved power quality

Lightning-induced overvoltages can result in:

• a) Voltage sags

• b) Voltage dips

• c) Voltage swells

• d) Voltage surges

How can lightning-induced overvoltages affect power system equipment?

• a) Increase their efficiency

• b) Decrease their lifespan

• c) Improve their performance

• d) Reduce their maintenance requirements

Which of the following protective measures can help mitigate the effects of lightning-induced overvoltages?

• a) Grounding systems

• b) Capacitor banks

• c) Voltage regulators

• d) Power factor correction devices

What causes overvoltages in the power system due to lightning?

• a) Voltage fluctuations

• b) Short circuits

• c) Lightning strikes

• d) Generator malfunctions

How do lightning-induced overvoltages affect the power system?

• a) Increase power system stability

• b) Decrease power system losses

• c) Cause insulation breakdown and equipment damage

• d) Improve power quality

Which of the following is an effect of lightning-induced overvoltages on the power system?

• a) Increased power transmission efficiency

• b) Reduced line losses

• c) Increased system reliability

• d) Flashover and arcing on power lines

Which equipment in the power system is most vulnerable to lightning-induced overvoltages?

• a) Transformers

• b) Circuit breakers

• c) Insulators

• d) Power cables

How can the effects of lightning-induced overvoltages be mitigated in the power system?

• a) Installing surge arresters

• b) Increasing power generation capacity

• c) Using thicker power cables

• d) Reducing power demand