Practice question

What is brake lag in an air brake system?

  1. Permanent pressure loss after every stop
  2. A device that drains tanks daily
  3. The point where the safety valve opens
  4. A brief delay in brake application and release, up to about one-half second

Answer: D — A brief delay in brake application and release, up to about one-half second

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Practice more: Ontario Air Brake Z Test Practice Questions - Ontario Air Brake (Z Endorsement) Knowledge Test Exam →