SafetyQuestion 324 of 360
Cal/OSHA recognizes several methods of protecting workers from trench cave-ins. Which of the following is a recognized protective method?
a.Posting a warning sign at the trench edge
b.Having workers wear hard hats and reflective vests
c.Shielding with a trench box (shield)
d.Keeping a first-aid kit on the truck
Explanation
Title 8 §1541.1 recognizes sloping/benching, shoring (supporting the walls with hydraulic or timber systems), and shielding (a trench box that protects workers if the wall fails). A trench box does not prevent a cave-in but shields workers inside it. Warning signs and PPE do not protect against the soil collapsing.
Law Reference: Cal/OSHA Title 8 §1541.1Practice all 360 questions free — no signup required.
Related questions on this topic
- A plumber is working in a trench 5 feet deep and 60 feet long installing pipe. Cal/OSHA requires a means of egress (ladder, ramp, or steps). How far must a worker ever have to travel laterally to reach that egress?
- A very deep sewer excavation reaches 22 feet. What does Cal/OSHA require regarding the protective system for a trench deeper than 20 feet?
- A crew chooses to slope the walls of a trench instead of shoring it. The soil has been classified as Type C (the least stable, such as loose sand or wet soil). What is the maximum allowable slope for Type C soil?
- A trench that was safe yesterday saw heavy overnight rain. How often does Cal/OSHA require a competent person to inspect an excavation where workers will be exposed?
- Before a plumbing contractor begins excavating for a new sewer lateral, California law requires a step to avoid striking buried utilities. What must the contractor do?
- A worker asks why a 5-foot trench needs protection when the walls 'look solid.' What fact best explains the danger of an unsupported trench wall?
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