Question 764 Deck Safety

The correct answer is B) spaces open to the atmosphere. Fixed CO2 systems are not used in spaces open to the atmosphere, such as the weather decks or other areas that are exposed to the outside air. This is because the CO2 gas would be quickly dispersed and not effectively suppress a fire in these types of open spaces. Instead, fixed CO2 systems are typically used in enclosed spaces like the engine room, paint lockers, and cargo holds where the gas can be contained and effectively smother a fire. The other answer options are incorrect because the engine room (A), cargo holds (C), and paint lockers (D) are all examples of enclosed spaces where fixed CO2 systems would be an appropriate fire suppression method, unlike open-to-atmosphere spaces.