N1 and N2 gauges indicate what in a turbine engine?

N1 and N2 gauges indicate what in a turbine engine?

• A. Oil pressure in the engine
• B. The temperature of the gas flow
• C. The rotation rate of the low and high pressure compressors
• D. The fuel flow rate

Answer: (C)

The N1 and N2 gauges in a turbine engine specifically measure the rotation rates of the low pressure and high pressure compressors, respectively. N1 indicates the speed of the low pressure compressor, which is generally associated with the engine's fan, while N2 reflects the speed of the high pressure compressor that compresses the air for combustion in the combustion chamber. These gauges are crucial for the operation and performance monitoring of the engine, as they provide pilots with real-time data on the engine's performance. Maintaining the correct rotational speeds is essential for efficiency and thrust, and it helps prevent engine damage or failure. The other choices do not accurately describe the function of the N1 and N2 gauges, as oil pressure, gas temperature, and fuel flow rate are monitored by different gauges and instruments within the aircraft engine performance monitoring systems.

The N1 and N2 gauges in a turbine engine specifically measure the rotation rates of the low pressure and high pressure compressors, respectively. N1 indicates the speed of the low pressure compressor, which is generally associated with the engine's fan, while N2 reflects the speed of the high pressure compressor that compresses the air for combustion in the combustion chamber.

These gauges are crucial for the operation and performance monitoring of the engine, as they provide pilots with real-time data on the engine's performance. Maintaining the correct rotational speeds is essential for efficiency and thrust, and it helps prevent engine damage or failure.

The other choices do not accurately describe the function of the N1 and N2 gauges, as oil pressure, gas temperature, and fuel flow rate are monitored by different gauges and instruments within the aircraft engine performance monitoring systems.