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

Before opening a steam or chemical process line for repair, the Nevada A-20 crew's first safety control is to:

Isolate the line, relieve stored energy, and apply lockout/tagout Increase system pressure so residual fluid is forced out of the joint Crack the nearest flange while the line is still at operating pressure Purge the line with pure oxygen to clear residual product

Correct Answer:

Isolate the line, relieve stored energy, and apply lockout/tagout

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