Which of the following is a class C fire?

A.
electrical

B.
liquid

C.
common combustibles

D.
soda acid

Explanation:
Class C fires are electrical fires.
Class C fires are electrical fires which that may occur in electrical equipment or wiring. Class C fire
extinguishers use gas, CO2 or dry powders as these extinguishing agents are non-conductive.
Incorrect Answers:
B: A flammable liquid fire (such as gasoline, oil, lacquers) is a Class B fire. Therefore, this answer is incorrect.
C: A common combustibles fire (such as wood, paper, cloth) is a Class A fire. Therefore, this answer is
incorrect.
D: Soda acid is not a type of fire; it’s a type of fire extinguisher. Therefore, this answer is incorrect.

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