Construction Supervisor License Practice Exam

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Which of the following is not considered a method to prevent moisture issues in foundation drains?

A. Slope grading away from foundation
B. Using crushed stone
C. Installing a vapor barrier
D. Using plywood

The correct answer is: D. Using plywood

Using plywood is not considered a method to prevent moisture issues in foundation drains. The other methods listed are effective strategies for mitigating moisture around foundations. Slope grading away from the foundation is essential because it directs surface water away, reducing the amount of water that might seep into the foundation area. Using crushed stone in the drainage system improves drainage and helps to disperse water more effectively, preventing pooling around the foundation. Installing a vapor barrier works to prevent moisture from migrating through walls and into living spaces, thereby protecting the foundation from dampness which can lead to structural issues. Plywood, on the other hand, does not have any properties or functions that contribute to moisture management in foundation drainage systems. In fact, using plywood in wet areas can lead to deterioration and increased moisture retention rather than alleviating moisture problems. Therefore, it stands out as the option that does not fit with the methods commonly employed to manage moisture effectively in foundation settings.