Cowling refers to what part of an aircraft?

• A. The landing gear housing.
• B. The cabin pressurization system.
• C. The wing flap mechanism.
• D. The material that encloses an engine.

Answer: (D)

Cowling is the engine enclosure—the streamlined cover around an engine that helps reduce drag and directs cooling air. It protects the engine and provides access for maintenance, while housing cooling ducts and other system components. This is different from the landing gear housing (the fairing around the wheels), the cabin pressurization system (which maintains cabin air pressure), or the wing flap mechanism (which controls flap movement on the wing). In short, cowling refers to the part that encloses the engine.