AL Pipelines Practice Questions - Alabama Pipelines Contractor Examination Exam

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Before employees enter an excavation deeper than 4 feet where a hazardous atmosphere could reasonably be expected, what must occur?

Atmospheric testing for oxygen deficiency, flammable gas, and toxic contaminants as appropriate Only a visual look from the top with no instruments Filling the trench with water first Removal of all ladders to keep people out permanently

Correct Answer:

Atmospheric testing for oxygen deficiency, flammable gas, and toxic contaminants as appropriate

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