What indicates the amount of torque in an aircraft engine?

• A. Fuel Flow Indicator
• B. Torque Meter
• C. First Limit Indicator
• D. Engine Efficiency Gauge

Answer: (C)

The measurement of torque in an aircraft engine is best indicated by a torque meter. A torque meter is a specific instrument designed to measure the rotational force or torque produced by the engine, which is critical for understanding engine performance and capability. Torque is directly related to the engine’s power output and is essential for ensuring that the engine operates within safe limits.

While other instruments serve important functions, they do not specifically indicate torque. For instance, a fuel flow indicator measures the amount of fuel consumed by the engine, which can relate to performance but does not directly indicate torque. The first limit indicator provides information about critical limits within which systems must function safely but does not detail torque output. An engine efficiency gauge might indicate how effectively the engine is converting fuel into power but does not provide data on torque itself.

Thus, the torque meter is the specialized instrument for monitoring torque, making it the correct answer.