Which of the following is NOT listed as a component of the combustion chamber?

• A. Igniter plug
• B. Fuel nozzle
• C. Fuel drain
• D. Intake fan

Answer: (D)

The main idea here is which parts belong to the combustion chamber. In a gas turbine engine, the combustion chamber is where fuel and air mix and burn to produce high-energy gases. Components you’d expect there include the igniter plug, which provides the spark to start combustion; the fuel nozzle, which sprays fuel into the chamber for burning; and the fuel drain, which allows draining fuel from the chamber for maintenance or purging. An intake fan, however, is part of the air intake and compressor section, not the combustion chamber. It helps move and compress incoming air before it reaches the chamber, but it does not reside in or function as part of the combustion chamber itself.