Which statement best describes VEN's purpose?

• A. It heats engine oil.
• B. It reduces drag on the airframe.
• C. It provides required thrust and fuel efficiencies while maintaining exhaust gas temperature.
• D. It rotates the engine shaft.

Answer: (C)

A variable exhaust nozzle (VEN) is designed to adjust the exhaust flow so the engine can deliver the right amount of thrust while staying fuel-efficient and safe. By changing the nozzle exit area, the engine can optimize expansion and back pressure for different flight conditions, which helps maintain the exhaust gas temperature at safe levels and preserves overall efficiency. It’s not responsible for heating engine oil, reducing external drag, or rotating the engine shaft—those functions come from other systems or components.