Question 778 Deck Safety

The correct answer is B) 0°F at 300 PSI. The normal designed CO2 storage tank temperature and pressure associated with a ship's low-pressure CO2 fixed fire extinguishing system is approximately 0°F at 300 PSI. This is because CO2 is stored as a liquid at low temperature and high pressure in these systems to maximize the amount of extinguishing agent that can be stored in a given volume. The low temperature of 0°F helps maintain the CO2 in a liquid state at the relatively high pressure of 300 PSI. The other options are incorrect because 70°F is too warm for liquid CO2 storage, and 150 PSI or 50 PSI would not be sufficient pressure to maintain the CO2 in a liquid state.