When a ship's low-pressure CO2 fixed fire extinguishing system is activated from a remote location, what determines the quantity of CO2 that will be released into the selected compartment?

Correct Answer: Option C — A timer mechanism controls the discharge valve and is preset for the space being activated.

Low-pressure CO2 systems utilize refrigerated storage tanks where discharge duration and total mass delivered are strictly governed by a preset timer mechanism on the master valve control panel, matching the specific volume and gross tonnage of the protected space.