Practice question

What is brake lag in an air brake vehicle?

  1. The time spent draining reservoirs before a trip
  2. The distance between dual tires
  3. The delay between pressing the brake pedal and the brakes beginning to work while air flows through the system
  4. The clearance between a fifth wheel and trailer apron

Answer: C — The delay between pressing the brake pedal and the brakes beginning to work while air flows through the system

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Practice more: Alberta Air Brake (Q) Knowledge Test Practice Questions - Alberta Air Brake (Q Endorsement) Knowledge Test Exam - Variant 2 →