Practice question

Why can brakes that are barely within tolerance when cold become dangerous after several applications?

  1. The compressor stops permanently after three applications
  2. Heat disables the low-air warning
  3. Brake drums can expand with heat, increasing pushrod travel and reducing effective braking
  4. ABS removes all friction from hot drums

Answer: C — Brake drums can expand with heat, increasing pushrod travel and reducing effective braking

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