Exhaust Gas Temperature (EGT) is measured at which location in a turbine engine?

Exhaust Gas Temperature (EGT) is measured at which location in a turbine engine?

• A. After The Turbine
• B. Before The Compressor
• C. In The Intake Plenum
• D. In The Exhaust Pipe After Nozzle

Answer: (A)

Exhaust Gas Temperature is read from the hot gases in the exhaust stream as they leave the turbine section. Reading the temperature here gives a direct indication of the energy state the turbine just had to extract work from and is closely tied to fuel flow and turbine health. This location reflects how hot the gases are after combustion and turbine interaction, which is what you want to monitor to prevent overheating and to verify proper engine operation. Measuring before the compressor would only tell you the pre-ignition air temperature, and in the intake plenum you’d capture ambient air temperature, neither of which informs you about turbine performance. Measuring in the exhaust pipe after the nozzle can be unreliable due to expansion and cooling effects there, making it a less representative point for monitoring turbine conditions.

Exhaust Gas Temperature is read from the hot gases in the exhaust stream as they leave the turbine section. Reading the temperature here gives a direct indication of the energy state the turbine just had to extract work from and is closely tied to fuel flow and turbine health. This location reflects how hot the gases are after combustion and turbine interaction, which is what you want to monitor to prevent overheating and to verify proper engine operation. Measuring before the compressor would only tell you the pre-ignition air temperature, and in the intake plenum you’d capture ambient air temperature, neither of which informs you about turbine performance. Measuring in the exhaust pipe after the nozzle can be unreliable due to expansion and cooling effects there, making it a less representative point for monitoring turbine conditions.