Practice question

For the Kentucky CDL Combination Vehicles test, which statement is correct about backing mirror use?

  1. Close every shut-off valve before moving the combination.
  2. Use mirrors on both sides and recheck the path if unsure.
  3. Use actual loaded weight instead of GVWR or GCWR for CDL class decisions.
  4. Use the trailer hand valve for normal braking while driving.

Answer: B — Use mirrors on both sides and recheck the path if unsure.

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