An inert gas purge is used to prevent ignition by reducing oxygen.

• A. True
• B. False
• C. Sometimes
• D. Never

Answer: (A)

An inert gas purge prevents ignition by reducing the amount of oxygen in the space. By flooding the area with an inert gas like nitrogen, air is displaced and the oxygen level drops, lowering the oxidizer available for any flammable vapors. With less oxygen and often with the vapors diluted, the mixture is kept outside the flammable range, making ignition much less likely during maintenance, cleaning, or opening procedures. Remember to monitor oxygen levels for safety, since an oxygen-deficient environment can pose its own hazards for workers.