Which of the following best describes the purpose of the duct plugs?

Which of the following best describes the purpose of the duct plugs?

• A. They prevent moisture and blockage
• B. They accelerate cable installation
• C. They reduce optical loss
• D. They indicate cable end

Answer: (A)

Duct plugs seal empty conduits in fiber-optic installations to protect the internal environment. Their main purpose is to keep moisture, dust, and debris out of the duct, which helps prevent contamination and blockages that could complicate pulling cables or affect future access. By preventing moisture ingress, they also reduce conditions that can lead to problems inside the duct over time. They don’t speed up installation, don’t directly reduce optical losses along the fiber, and aren’t used as markers to indicate a cable end.

Duct plugs seal empty conduits in fiber-optic installations to protect the internal environment. Their main purpose is to keep moisture, dust, and debris out of the duct, which helps prevent contamination and blockages that could complicate pulling cables or affect future access. By preventing moisture ingress, they also reduce conditions that can lead to problems inside the duct over time. They don’t speed up installation, don’t directly reduce optical losses along the fiber, and aren’t used as markers to indicate a cable end.