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Aircraft systems and instrumentsQuestion 663 of 934

What are the risks of operating an aircraft with a defective exhaust heating system?

  1. Carburetor icing, a lean mixture, and a lower oil pressure
  2. Low oil pressure, a high oil temperature, and a rough run
  3. Propeller overspeed, detonation, and a loss of rpm
  4. Carbon monoxide poisoning, less performance, and fire risk
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Correct answer: Carbon monoxide poisoning, less performance, and fire risk

Exhaust heating systems are the simplest type of aircraft heating system and are used on most light aircraft.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 7: Aircraft Systems — Heating System — Exhaust Heating Systems, page 189

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026