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What overhead hazard must be checked before backing into a loading area or under an awning?
- A.Only the height of the dock plate
- B.Low clearance from canopies, wires, dock doors, and tree limbs that the trailer roof can strike
- C.The color of the building
- D.Overhead hazards matter only for tanker trucks
Correct answer
B. Low clearance from canopies, wires, dock doors, and tree limbs that the trailer roof can strike
Why
Backing focuses attention low and behind, so roof-height obstacles are easy to miss until the trailer top makes contact. The pre-back walk should include looking up along the entire path, not just at ground level.
Manual topic: Backing - Clearance · From the General Knowledge practice bank (GK-286).