Pilot Exam Coach

US Private Pilot

Switch to Canada PSTAR
Aircraft systems and instrumentsQuestion 601 of 934

A pilot finds carburetor ice. What should the pilot do?

  1. Apply partial carburetor heat for a few seconds
  2. Lean the mixture and keep the carburetor heat off
  3. Apply full carburetor heat at once and keep it on
  4. Increase the throttle and keep the carburetor heat off
Show answer

Correct answer: Apply full carburetor heat at once and keep it on

Partial heat, or heat applied for too short a time, can make the situation worse.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 7: Aircraft Systems — Induction Systems — Carburetor Heat, page 170

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026