Pt7 is a designation used to label turbine discharge pressure in some manuals. Which of the following is Pt7 most closely associated with?

Pt7 is a designation used to label turbine discharge pressure in some manuals. Which of the following is Pt7 most closely associated with?

• A. Engine fuel temperature
• B. Compressor inlet pressure
• C. Fuel flow rate
• D. Turbine discharge pressure

Answer: (D)

Pt7 marks the pressure at the turbine discharge—the gas pressure as it exits the turbine section. In many manuals, the “Pt” prefix labels a total pressure at a specific station in the engine’s gas-path, and the number points to that station’s location. Because Pt7 is read from the turbine’s outlet, it directly represents the turbine discharge pressure. This measurement helps engineers understand the turbine’s work delivered and the pressure conditions in the exhaust path. Other items listed—engine fuel temperature, compressor inlet pressure, or fuel flow rate—relate to different quantities (temperature, another station’s pressure, and a flow rate, respectively) and are not what Pt7 denotes.

Pt7 marks the pressure at the turbine discharge—the gas pressure as it exits the turbine section. In many manuals, the “Pt” prefix labels a total pressure at a specific station in the engine’s gas-path, and the number points to that station’s location. Because Pt7 is read from the turbine’s outlet, it directly represents the turbine discharge pressure. This measurement helps engineers understand the turbine’s work delivered and the pressure conditions in the exhaust path. Other items listed—engine fuel temperature, compressor inlet pressure, or fuel flow rate—relate to different quantities (temperature, another station’s pressure, and a flow rate, respectively) and are not what Pt7 denotes.