Rhode Island Journeyman Plumber Practice Exam

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What indicates that a vent has been properly sized?

If it provides adequate airflow
If it connects to multiple fixtures
If it is at least 2 inches
If it matches the pipe diameter

The correct answer is: If it provides adequate airflow

A properly sized vent is crucial for ensuring that a plumbing system functions correctly. Adequate airflow is vital because plumbing vents allow air to enter the drainage system, helping to equalize pressure and facilitate the free flow of wastewater. If the vent is properly sized, it will effectively manage the air pressure within the system, preventing issues such as siphoning or backpressure that can disrupt drainage. While connections to multiple fixtures, a minimum diameter, and matching pipe dimensions can be important considerations in the design of a plumbing system, they do not, in isolation, guarantee that a vent is functioning effectively. Adequate airflow is the key indicator that the venting system is appropriately sized and installed, enabling efficient drainage and minimizing the risk of drainage system malfunctions.