FAA Powerplant Written Practice Test

In the event of a fire caused by a false start of a turbine engine, which extinguishing agent is typically first used?

1. Halon 1301

2. Carbon dioxide

3. Water spray

4. Foam fire extinguisher

The correct answer is: Halon 1301

In the scenario of a fire caused by a false start of a turbine engine, Halon 1301 is typically the first extinguishing agent used. Halon 1301 is a clean agent that effectively interrupts the chemical reaction of combustion without causing harm to the engine components or leaving residue that could negatively affect engine performance. It is particularly advantageous in aviation settings where quick response and minimal downtime are critical. Halon works by displacing oxygen and chemically interrupting the combustion process, making it suitable for use on flammable liquids and electrical fires, which are common in turbine engine environments. Its ability to reach the fire quickly and extinguish it efficiently makes it a preferred choice in these situations. Other options, while they may have their uses in different fire scenarios, do not possess the same efficiency and effectiveness in dealing with the specific conditions of a turbine engine fire. Carbon dioxide, although it also extinguishes fires by displacing oxygen, may not be as effective on flammable liquids or in areas with high temperatures as Halon. Water spray can be used for certain types of fires, but it is generally not recommended for flammable liquid fires or electrical fires due to the risk of spreading the fire or potential electrocution. Foam fire extinguishers are suitable