NM CID GF-9 Practice Questions - New Mexico CID GF-9 Utility Lines Contractor Examination Exam

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When must the atmosphere in an excavation be tested before employees enter, if oxygen deficiency or a hazardous atmosphere could reasonably be expected?

Only in excavations deeper than 20 feet Before employees enter excavations greater than 4 feet in depth Only after a worker reports dizziness Never, because trenches are always open to the air

Correct Answer:

Before employees enter excavations greater than 4 feet in depth

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