Question 214Safety & Environmental - QMED

The correct answer is C) The tank cooling system has malfunctioned. In a low-pressure CO2 fixed fire extinguishing system, the CO2 tank is kept at a low pressure, typically around 300-500 psi. This low pressure is maintained by a tank cooling system that keeps the tank at the proper temperature. If the tank cooling system malfunctions, the temperature of the CO2 in the tank will rise, causing the pressure to increase. This increase in pressure would trigger the high-pressure alarm. The other answer choices are incorrect because: A) Excessive insulation would not cause a high-pressure alarm, it would just make the tank harder to cool. B) An air leak would cause a low-pressure alarm, not a high-pressure alarm. D) A leaking pilot cylinder discharge valve would not directly affect the pressure in the main CO2 tank.