Practice question

For the Washington CDL Air Brakes knowledge test, what is an automatic slack adjuster?

  1. A device that drains the tanks automatically
  2. A slack adjuster that adjusts itself during normal operation to compensate for lining wear
  3. A type of compressor
  4. A safety relief valve

Answer: B — A slack adjuster that adjusts itself during normal operation to compensate for lining wear

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