Which of the following more closely describes the combustibles in a Class
B-rated fire?
A.
Gas
B.
Paper
C.
Liquid
D.
Electrical
Explanation:
The correct answer is C. Paper is described as a common combustible
and is therefore rated a class A fire. An electrical fire is rated
Class C. Gas is not defined as a combustible.
Class A
Class A Fires consist of ordinary combustibles such as wood, paper, trash or anything else that leaves an ash. Water works best to extinguish a Class A fire.
Class B
Class B Fires are fueled by flammable or combustible liquids, which include oil, gasoline, and other similar materials. Smothering effects which deplete the oxygen supply work best to extinguish Class B fires.
Class C
Class C Fires. Energized Electrical Fires are known as Class C fires. Always de-energize the circuit then use a non-conductive extinguishing agent. Such as Carbon dioxide.
Class D
Class D Fires are combustible metal fires. Magnesium and Titanium are the most common types of metal fires. Once a metal ignites do not use water in an attempt to extinguish it. Only use a Dry Powder extinguishing agent. Dry powder agents work by smothering and heat absorption.
Class K
Class K Fires are fires that involve cooking oils, grease or animal fat and can be extinguished using Purple K, the typical agent found in kitchen or galley extinguishers.
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