Practice question

When uncoupling a triple trailer rig:

  1. The second trailer should be uncoupled first.
  2. The third trailer should be uncoupled first.
  3. The order of uncoupling is not important.
  4. The heaviest trailer should be uncoupled first.

Answer: B — The third trailer should be uncoupled first.

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Practice more: North Dakota CDL Double Test 1 →