Practice question

For the Washington CDL Air Brakes knowledge test, in cold weather, what should drivers monitor more closely in the air brake system?

  1. Tire tread
  2. Air pressure, drain valves, and the alcohol evaporator (if equipped) because moisture and oil can freeze quickly
  3. Engine oil only
  4. Radio reception

Answer: B — Air pressure, drain valves, and the alcohol evaporator (if equipped) because moisture and oil can freeze quickly

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Practice more: Washington CDL Air Brakes Test Practice Questions - Washington Commercial Driver License (CDL) Air Brakes Knowledge Test Exam →