AZ ROC CR-34 Painting & Wall Covering Practice Questions - Arizona ROC CR-34 Painting And Wall Covering (Residential Commercial) Examination Exam

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What is the maximum relative humidity (RH) threshold specified by ASTM F2170 (in-situ probe testing) for installing standard non-breathable coating systems over concrete?

75% to 80% RH 95% to 99% RH 50% to 55% RH 30% to 40% RH

Correct Answer:

75% to 80% RH

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