Rhode Island Journeyman Plumber Practice Exam

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What is the minimum weight requirement for sheet lead?

8 ounces per square foot
10 ounces per square foot
12 ounces per square foot
14 ounces per square foot

The correct answer is: 12 ounces per square foot

The minimum weight requirement for sheet lead is crucial for its application in plumbing, particularly in areas that require lead as a barrier or in flashing. The specification of 12 ounces per square foot ensures that the lead is sufficiently durable and provides adequate protection against water penetration, which is essential in maintaining the integrity of plumbing systems and preventing leaks. Choosing 12 ounces per square foot as the standard strikes a balance between being thick enough to resist deterioration over time while also being manageable for installation purposes. This weight provides the necessary density and flexibility, making it suitable for use in various plumbing contexts, including roofs and wall cavities where lead sheets are typically utilized for moisture control. The other options, although they reflect common weights of sheet lead, do not meet the established minimum requirement for plumbing applications as determined by industry standards. Therefore, 12 ounces per square foot stands as the correct choice to ensure both functionality and compliance with plumbing codes.