Hangar and shop fire extinguishers shall be either CO2 and dry chemical, water and foam, ABC and BC, or Halon and Water. Which combination is specified?

Hangar and shop fire extinguishers shall be either CO2 and dry chemical, water and foam, ABC and BC, or Halon and Water. Which combination is specified?

• A. Water and Foam
• B. ABC and BC
• C. CO2 and Dry Chemical
• D. Halon and Water

Answer: (C)

In hangar and shop environments you need extinguishing agents that can safely handle both electrical equipment and flammable liquids, while avoiding damage to sensitive gear and minimizing residual mess. Carbon dioxide is ideal for electrical fires because it displaces the oxygen without leaving a conductive or corrosive residue that could harm wiring, avionics, or stored components. Dry chemical extinguishers, especially the versatile ABC type, cover a wide range of hazards: ordinary combustibles, flammable liquids, and electrical fires. This combination ensures effective suppression of typical hangar/shop flames from fuels, oils, papers, and energized equipment, with manageable cleanup. Other options fall short in these settings. Water and foam can damage electrical systems and equipment and are not ideal for fuel fires. Halon is effective for electrical fires but is restricted and less practical today. BC extinguishers lack protection for ordinary combustibles, which are common in shop environments.

In hangar and shop environments you need extinguishing agents that can safely handle both electrical equipment and flammable liquids, while avoiding damage to sensitive gear and minimizing residual mess.

Carbon dioxide is ideal for electrical fires because it displaces the oxygen without leaving a conductive or corrosive residue that could harm wiring, avionics, or stored components. Dry chemical extinguishers, especially the versatile ABC type, cover a wide range of hazards: ordinary combustibles, flammable liquids, and electrical fires. This combination ensures effective suppression of typical hangar/shop flames from fuels, oils, papers, and energized equipment, with manageable cleanup.

Other options fall short in these settings. Water and foam can damage electrical systems and equipment and are not ideal for fuel fires. Halon is effective for electrical fires but is restricted and less practical today. BC extinguishers lack protection for ordinary combustibles, which are common in shop environments.