When starting a gas turbine engine, which two primary gauges should be observed?

When starting a gas turbine engine, which two primary gauges should be observed?

• A. The high pressure compressor and oil pressure
• B. The low pressure compressor and fuel flow
• C. The high pressure compressor and ITT
• D. The engine speed and thrust level

Answer: (C)

Monitoring the high-pressure compressor (HPC) and the Interstage Turbine Temperature (ITT) during the start of a gas turbine engine is crucial for several reasons. The high-pressure compressor is essential as it indicates the engine's ability to compress incoming air, which is critical for the combustion process. Observing the HPC helps ensure that the engine is properly functioning and achieving the necessary airflow for combustion. The Interstage Turbine Temperature is also vital because it reflects the thermal environment within the engine. Monitoring ITT during start-up helps identify any potential overheating issues that could damage the engine components. Both of these gauges provide key insights into the performance and health of the engine during a critical phase of operation, ensuring that the engine starts safely and efficiently. Proper monitoring can help detect potential issues early on, allowing for preventive measures to be taken if necessary.

Monitoring the high-pressure compressor (HPC) and the Interstage Turbine Temperature (ITT) during the start of a gas turbine engine is crucial for several reasons.

The high-pressure compressor is essential as it indicates the engine's ability to compress incoming air, which is critical for the combustion process. Observing the HPC helps ensure that the engine is properly functioning and achieving the necessary airflow for combustion.

The Interstage Turbine Temperature is also vital because it reflects the thermal environment within the engine. Monitoring ITT during start-up helps identify any potential overheating issues that could damage the engine components.

Both of these gauges provide key insights into the performance and health of the engine during a critical phase of operation, ensuring that the engine starts safely and efficiently. Proper monitoring can help detect potential issues early on, allowing for preventive measures to be taken if necessary.