Replacement flight line fire extinguishers shall be?

Replacement flight line fire extinguishers shall be?

• A. 30 Lbs water extinguishers
• B. 150 Lbs dry chemical extinguishers
• C. 10 Lbs CO2 extinguishers
• D. 200 Lbs dry chemical extinguishers

Answer: (B)

Replacement flight line fire extinguishers are specified in a size and type that can handle the kinds of fires likely on an aircraft parking area. A 150-pound dry chemical extinguisher is chosen because it provides a broad ABC rating, making it effective on class A (ordinary combustibles), class B (flammable liquids like fuel), and class C (electrical) fires that are common on the flight line. Dry chemical extinguishers are versatile and work well for these mixed hazards, and the substantial weight means there’s enough agent to begin a substantial push on a fire and buy time until more help arrives. Water extinguishers aren’t suitable for hydrocarbon fuel fires and can spread burning fuel, plus they aren’t ideal for electrical hazards. Carbon dioxide extinguishers are excellent for small electrical fires but lose effectiveness outdoors where wind dissipates the gas and they don’t handle fuel fires well. A 200-pound dry chemical extinguisher is larger than the standard replacement and more cumbersome to move and operate; the 150-pound size strikes the recommended balance for flight line needs.

Replacement flight line fire extinguishers are specified in a size and type that can handle the kinds of fires likely on an aircraft parking area. A 150-pound dry chemical extinguisher is chosen because it provides a broad ABC rating, making it effective on class A (ordinary combustibles), class B (flammable liquids like fuel), and class C (electrical) fires that are common on the flight line. Dry chemical extinguishers are versatile and work well for these mixed hazards, and the substantial weight means there’s enough agent to begin a substantial push on a fire and buy time until more help arrives.

Water extinguishers aren’t suitable for hydrocarbon fuel fires and can spread burning fuel, plus they aren’t ideal for electrical hazards. Carbon dioxide extinguishers are excellent for small electrical fires but lose effectiveness outdoors where wind dissipates the gas and they don’t handle fuel fires well. A 200-pound dry chemical extinguisher is larger than the standard replacement and more cumbersome to move and operate; the 150-pound size strikes the recommended balance for flight line needs.