Question 777 Deck Safety

The correct answer is D) A pneumatic timer controls each discharge selector valve, and is preset for each space. The quantity of CO2 released into a selected space in a low-pressure CO2 fixed fire extinguishing system is determined by a pneumatic timer that controls the discharge selector valve. This timer is preset to release the appropriate amount of CO2 for the specific protected space, based on the volume of that space. The other options are incorrect because: A) The number of nozzles does not determine the quantity of CO2 released; C) The CO2 tank is not partitioned into sections for each space, but rather has a single main tank; and B) The temperature of the space does not control the discharge - the preset timer does.