NV C-4E Drywall Practice Questions - Nevada C-4E Drywall Contractor Examination Exam

How does a setting-type joint compound harden compared with a ready-mix drying-type compound?

Setting-type hardens by chemical reaction; drying-type hardens by water evaporation Both harden only by freezing Setting-type never hardens and stays permanently plastic Drying-type hardens in a fixed 20, 45, or 90 minutes regardless of humidity

Correct Answer:

Setting-type hardens by chemical reaction; drying-type hardens by water evaporation

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