Engine: Engineering Safety

1. A De-energizes the "charged mist" effect.
2. B Maintains a positive pressure on the vent header to cool the flammable vapors.
3. C Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit.
4. D Inert gas filters out the flammable vapors from the cargo tank spaces.

Tip: press A-D to answer