Certified Utility Safety Professional (CUSP) Practice Exam

The main rule being tested is the height threshold for fall protection: you typically need protection when a worker could fall six feet or more to a lower level. If you’re on flat ground with no edge of a hole, there isn’t a fall hazard to guard against. If guardrails are already in place around an opening, they provide the needed protection, so no additional fall-arrest system is required. Using PPE can supplement protection when engineered controls aren’t feasible, but it isn’t the primary protection for elevated work. Excavations less than six feet deep aren’t subject to mandatory fall protection because any potential fall would be under that six-foot threshold. Of course, other safety rules still apply for excavations—such as protecting against cave-ins and controlling access to the opening.