NV C-1C Pipe And Duct Insulation Practice Questions - Nevada C-1C Pipe And Duct Insulation Contractor Examination Exam

On chilled-water piping, where must the vapor retarder be placed?

On the pipe surface under the insulation On the outside of the insulation, sealed at every joint and penetration Only on the ends of each pipe length Vapor retarders are never used on cold piping

Correct Answer:

On the outside of the insulation, sealed at every joint and penetration

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