Massachusetts Plumbers Journeyman Practice Exam

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What does a waste pipe convey according to the definition?

Water and waste
Air and waste
Waste only
Water only

The correct answer is: Waste only

A waste pipe is specifically designed to carry waste material away from various plumbing fixtures, such as sinks, toilets, and showers, as well as any accompanying water used in the process. The primary function of a waste pipe is to ensure that waste is efficiently transported from the source to a disposal point, typically a sewer or septic system. This definition aligns with the understanding that waste pipes are not intended to convey just water or any other elements. Instead, they focus on the removal of waste, which includes both solid and liquid debris. In the context of plumbing, the distinction is crucial, as waste pipes are not the same as drain pipes, which may also include other substances. Thus, the definition stipulates that a waste pipe conveys waste only, highlighting its specialized role in the plumbing system.