Question 4019 of 229 · California Water Distribution Operator Exam
At what trench depth does Cal/OSHA generally require a protective system such as shoring, sloping or a trench box?
Exactly one answer is correct.
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Correct answer to question 4019
- D: 5 feet
Explanation
Excavations 5 feet or deeper need protection unless in stable rock, and shallower ones need it if a competent person sees a hazard. A permit may also be required.
More questions: Drinking Water Regulations, Management and Safety
- 4020What is the role of the competent person at an excavation?
- 4021In a trench 4 feet or deeper, how close must a ladder or other exit be to workers?
- 4022How far from the edge of an excavation should spoil piles and equipment be kept?
- 4023What oxygen concentration range is considered safe to enter a confined space?
- 4024Which is an example of a permit-required confined space hazard for water workers?
- 4025What is the purpose of a Safety Data Sheet (SDS)?