NV A-20 Industrial Piping Practice Questions - Nevada A-20 Industrial Piping Contractor Examination Exam

A vault or tank pit used to install industrial piping is treated as a confined space primarily because it:

Has limited entry and may contain a hazardous atmosphere Always contains potable water Is shallower than 12 inches Is painted safety yellow

Correct Answer:

Has limited entry and may contain a hazardous atmosphere

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