AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

Where employees might be trapped by smoke or gas, which respiratory devices must be immediately available underground?

Any hardware-store dust mask Only a shared air horn at the portal Self-rescuers approved by NIOSH under 42 CFR 84 Scuba tanks intended for recreational diving only

Correct Answer:

Self-rescuers approved by NIOSH under 42 CFR 84

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