Plumbing Safety Module 2 Practice Test

Which measure is recommended to prevent trench wall collapse during excavation?

Inspect soil Provide escape routes Keep loads away Use shoring or trench boxes

Correct Answer:

Use shoring or trench boxes

Explanation:

Protecting trench walls with a structural support system is what directly prevents cave-ins. Using shoring or trench boxes provides physical support to the sides of the excavation, resisting the earth’s lateral pressure and keeping the trench stable while workers are inside. This is the effective measure to stop a trench wall from collapsing. Inspecting soil helps you determine when protection is needed, and escape routes or keeping loads away reduce other risks, but they don’t prevent trench wall collapse the way a protective system does.

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