Which statement about Class C fires is accurate?

A. Class C fires should be extinguished using a specialized wet chemical system.

B. Class C fires contain combustible metals and alloys such as titanium, lithium, or magnesium.

C. Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire.

D. Class C fires are rated from 1-C through 40-C and can be extinguished using a Class C extinguisher with the same rating.

Class C fires involve electrical hazards and should only be treated as Class A or B fires once the electricity is disconnected. The correct choice is that after turning off the electricity, it can be extinguished as a Class A or B fire based on its materials. Other statements about Class C fires are inaccurate concerning extinguishing methods and classifications.

Explanation:

Understanding Class C Fires

Class C fires are fires that involve flammable gases or energized electrical equipment. It's crucial to understand the correct methods for extinguishing such fires safely.

Correct Statement about Class C Fires

The accurate statement among the choices given is:

C. Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire.

Here's why:

Class A fires involve ordinary combustibles like wood or paper.
Class B fires involve flammable liquids such as gasoline.
Since Class C fires are electrical, once the electricity is disconnected, the fire can be treated as a Class A or B fire depending on the materials involved.

Why Other Options Are Incorrect

A. Class C fires should not use wet chemicals as they can conduct electricity.
B. Class C fires typically involve electrical equipment, not combustible metals, which are more related to Class D fires.
D. Class C designations do not use such numerical ratings; they focus on the electrical hazard class.

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