Gas Fitter Practice · Question
Which of the following is an inert gas used to purge gas lines before commissioning?
Nitrogen is commonly used as an inert gas to purge gas lines, displacing air or other gases to prevent explosive mixtures.
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Question: Which of the following is an inert gas used to purge gas lines before commissioning?
Answer options:
- Oxygen ✅ Nitrogen
- Methane
- Carbon Monoxide
Correct answer: Nitrogen
Explanation: Nitrogen is commonly used as an inert gas to purge gas lines, displacing air or other gases to prevent explosive mixtures.
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