What statement correctly describes the basic fire extinguisher classes typically found on aircraft?

• A. Class A (ordinary combustibles), Class B (flammable liquids), and Class C (electrical) fires.
• B. Class A (ordinary combustibles) and Class D (metal) fires only.
• C. Class B (flammable liquids) and Class F (cooking oils) fires only.
• D. Class C (electrical) and Class E (unknown) fires only.

Answer: (A)

Fires on aircraft typically involve three main types: ordinary combustibles, flammable liquids, and electrical equipment. The basic fire extinguisher set on airplanes is designed to cover these exactly, with classes for ordinary combustibles (A), flammable liquids (B), and energized electrical equipment (C). Knowing these categories helps crews choose the right extinguisher for the situation and explains why this combination best describes the standard onboard coverage. Metal fires (D) aren’t a common in-flight risk on civilian aircraft, and Class F for cooking oils isn’t part of the standard airplane extinguisher lineup, so they don’t fit the typical onboard system.