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Aircraft systems and instrumentsQuestion 636 of 934

What does an EGT gauge measure?

  1. The temperature of the oil in the sump
  2. The gas temperature at the exhaust manifold
  3. The air temperature in the carburetor throat
  4. The temperature of the cylinder head
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Correct answer: The gas temperature at the exhaust manifold

EGT varies with the ratio of fuel to air in the cylinders. A pilot can use it to regulate the mixture.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 7: Aircraft Systems — Exhaust Systems, page 178

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026