CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: C - Dry chemical is the most common fire suppression system deployed in server/equipment rooms.

Key Takeaway: A dry chemical fire extinguisher uses small free-flowing particles of sodium bicarbonate, potassium bicarbonate, potassium chloride, mono-ammonium phosphate, or other such chemicals mixed with anti-caking agents and moisture absorbers. It insulates Class-A fires by melting at approximately 350-400 degree F. It breaks the chain reaction of Class-B fires by coating the surface to which it is applied. It is safe and effective for Class-C fires since it is a non-conductor of electricity.