On take-off from a short runway at maximum take-off weight, what should be the bleed valve position?

• A. ON
• B. OFF
• C. Partially Open
• D. Closed

Answer: (B)

Bleed air taken from the engine adds a load on the compressor and creates extra drag, which reduces overall thrust available for takeoff. When you’re at maximum takeoff weight on a short runway, every bit of thrust matters, and you want to minimize any unnecessary engine load. If you don’t need bleed air for cabin conditioning or anti-ice during this maneuver, keeping the bleed valve closed avoids that additional burden and gives you the best takeoff performance and acceleration. Opening or partially opening would simply cost thrust and fuel without providing benefit in this scenario, unless bleed air is required for the environmental or anti-ice systems.