Red Seal Carpenter Practice Exam 2025 - Free Carpenter Practice Questions and Study Guide

Proper curing of concrete is critical for its long-term strength and durability. When newly poured concrete is exposed to air, it begins to lose moisture through evaporation which can result in cracking and weakening of the concrete. Option A is incorrect because while placing a polyethylene barrier can prevent the ground from absorbing moisture from the concrete, it does not directly address the issue of evaporation. Option B is incorrect because while wetting the polyethylene barrier can slow down the process of evaporation, it may not fully prevent it. Option D is incorrect because while wetting the burlap can provide moisture for the concrete, it is not as effective as directly placing a polyethylene sheet on top of the concrete to prevent it from drying out. Therefore, option C is the critical step as it directly addresses the issue of evaporation by creating a barrier between the concrete and the air.