ICRI CSMT Practice Questions - ICRI Certified Concrete Slab Moisture Testing Technician Exam

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When testing a concrete slab that is drying from only one side (e.g., slab on grade with vapor retarder beneath), ASTM F2170 requires that the relative humidity probe be inserted at what depth as a percentage of the slab thickness?

40% of the slab thickness 20% of the slab thickness 50% of the slab thickness 60% of the slab thickness

Correct Answer:

40% of the slab thickness

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