ERAU Commercial Checkride Practice Test – The All-in-One Guide to Mastering Your Checkride! 2025

Question: 1 / 400

What is the maximum cylinder head temperature (CHT) recommended?

400 degrees Fahrenheit

450 degrees Fahrenheit

500 degrees Fahrenheit

The maximum cylinder head temperature (CHT) recommended for many aircraft engines is typically around 500 degrees Fahrenheit. This temperature is crucial as it helps ensure the engine operates efficiently and prevents overheating, which can lead to significant engine damage or failure. Operating at or below this temperature keeps the engine components within their designed tolerances, promoting longevity and reliability.

Exceeding this temperature can create risks such as pre-ignition, detonation, and accelerated wear of engine parts, potentially leading to catastrophic failures. Maintaining the CHT at or below 500 degrees is essential for safe flight operations and optimal engine performance. Thus, this temperature serves as a critical guideline for pilots in managing engine health during flight.

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550 degrees Fahrenheit

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