Question 21 of 30
There are two disadvantages to CO2 when used as a total flooding firefighting agent. One of them is extinguishing concentration will not support human life and
A
A) The lack of cooling effect on heated materials
B
B) It breaks down under extreme heat to form poisonous gases
C
C) It cannot be used in a dead ship situation without electrical power available to CO2 pump
D
D) There is no effect on class A fire even in an enclosed space
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Answer & Explanation
The correct answer is Option A: A) The lack of cooling effect on heated materials.
CO2 is an asphyxiant that displaces oxygen, making it deadly in enclosed spaces. A major disadvantage is its lack of cooling capacity, meaning that once the CO2 gas dissipates, the hot fuel may reignite if the surfaces have not cooled down.