At what temperature will the 14th-Stage Bleed Air Valve be fully closed due to CTIT rise?

At what temperature will the 14th-Stage Bleed Air Valve be fully closed due to CTIT rise?

• A. 1,500°F.
• B. 2,175°F.
• C. 2,500°F.
• D. 3,000°F.

Answer: (B)

When the engine’s temperature limit is reached, bleed air valves are wired to protect the hot section. The 14th-stage bleed valve is controlled by CTIT, which reflects how hot the air entering the turbine is. As CTIT climbs, bleeding hot compressor air would push turbine inlet temperature even higher, risking damage. So the valve is commanded to close fully when CTIT reaches 2,175°F to stop adding heat to the core and keep the engine within safe limits. Values lower than that would shut the bleed prematurely during normal operation, while higher values would allow more heat buildup before protection kicks in.

When the engine’s temperature limit is reached, bleed air valves are wired to protect the hot section. The 14th-stage bleed valve is controlled by CTIT, which reflects how hot the air entering the turbine is. As CTIT climbs, bleeding hot compressor air would push turbine inlet temperature even higher, risking damage. So the valve is commanded to close fully when CTIT reaches 2,175°F to stop adding heat to the core and keep the engine within safe limits. Values lower than that would shut the bleed prematurely during normal operation, while higher values would allow more heat buildup before protection kicks in.