Practice question

For the Washington CDL Air Brakes knowledge test, what are glad hands?

  1. Special gloves for handling brake drums
  2. Hose couplers that connect the service and emergency air lines between a tractor and trailer
  3. Adjustment tools for slack adjusters
  4. Warning lights

Answer: B — Hose couplers that connect the service and emergency air lines between a tractor and trailer

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