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

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

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

Correct Answer:

Brake drums can expand with heat, increasing pushrod travel and reducing effective braking

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