Massachusetts Plumbers Journeyman Practice Exam

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Study for the Massachusetts Plumbers Journeyman Exam. Prepare with multiple choice questions, hints, and detailed explanations. Ace your licensing exam with confidence!

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What size should waste outlets serving shower stalls and compartments that are not part of bathtubs be?

A. 1 inch in diameter
B. 2 inches in diameter
C. 3 inches in diameter
D. 4 inches in diameter

The correct answer is: B. 2 inches in diameter

The correct answer is that waste outlets serving shower stalls and compartments that are not part of bathtubs should be 2 inches in diameter. This size is specified to ensure adequate drainage capacity and to prevent potential clogging issues that can arise with smaller outlets. A 2-inch diameter waste outlet provides a proper flow rate for the typical volume of water generated during shower use, which helps to manage drainage efficiently without causing backups. Plumbing codes generally recommend this size as it is widely tested and proven to be effective for residential and commercial shower installations. Larger sizes, like 3 inches or 4 inches, while capable of handling greater volumes, are generally excessive for shower drains and could lead to installation challenges or higher costs without providing any additional benefit. Conversely, smaller sizes such as 1 inch would not allow for adequate drainage, increasing the risk of water pooling and potential overflow situations. Thus, a 2-inch diameter is the optimum choice for effective waste management in shower installations.