Which of the following is a class A fire?

A.
common combustibles

B.
liquid

C.
electrical

D.
Halon

Explanation:
Class A fires involve “common combustibles”; these are ordinary combustible materials, such as cloth, wood,
paper, rubber, and many plastics.
Incorrect Answers:
B: A flammable liquid fire (such as gasoline, oil, lacquers) is a Class B fire. Therefore, this answer is incorrect.
C: Electrical fires are Class C fires. Therefore, this answer is incorrect.
D: Halon is not flammable; it is a gas used to suppress fires. Therefore, this answer is incorrect.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 472