NV C-5 Concrete Practice Questions - Nevada C-5 Concrete Contractor Examination Exam

Before placing a slab-on-ground, which subgrade condition is acceptable?

A firm, unfrozen, well-drained subgrade with organics and standing water removed Frozen soil left in place if it will thaw after the pour Topsoil left in place for cushioning Soft, pumping clay as long as the vapor retarder covers it

Correct Answer:

A firm, unfrozen, well-drained subgrade with organics and standing water removed

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