Which of the following tests measures moisture in a concrete slab by measuring moisture emission in a non-destructive relative humidity test of a confined pocket of air immediately above a concrete surface? A. polyethylene sheet test B. electrical resistance test C. hygrometer test D. protimeter relative humidity test Answer C. hygrometer test or relative humidity test uses a sensor in an entrapped air-pocket space. Protimeter RH testing is a destructive method inserting the probe in a pre-drilled hole. ARE 4.0 exam prep: BDCS
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