Methods of grounding

What is the primary purpose of grounding electrical equipment and systems?

• A) To protect against overvoltage
• B) To provide an electrical return path
• C) To protect against lightning
• D) All of the above

Which type of grounding system involves connecting all grounds to a common conductor that is buried in the earth?

• A) Resistance grounding
• B) Low-impedance grounding
• C) Solid grounding
• D) High-impedance grounding

What is the purpose of a ground grid?

• A) To provide a connection between grounding electrodes
• B) To reduce the resistance of the grounding system
• C) To increase the ground fault current
• D) None of the above

Which of the following is not a method of grounding?

• A) Rod grounding
• B) Plate grounding
• C) Inductance grounding
• D) Impedance grounding

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

• A) To reduce the ground resistance
• B) To limit the voltage rise caused by lightning
• C) To increase the ground fault current
• D) None of the above