Practice question

An emergency roof hatch:

  1. Must always be locked down before traveling.
  2. May be left partially open while traveling to allow for the movement of fresh air.
  3. Should never be opened, except in an emergency.
  4. Should always be open while traveling.

Answer: B — May be left partially open while traveling to allow for the movement of fresh air.

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Practice more: Illinois CDL Bus Test 2 →