← Venting Systems – Plumber Journeyman Exam

Plumber Journeyman Exam Sample Test

Try 5 free practice questions with instant feedback. See how ready you are.

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Sample Questions

Question 1

What is the primary purpose of a plumbing vent system?

Answer: To protect trap seals by equalizing air pressure within the drainage system, preventing siphonage and back pressure, and allowing sewer gases to escape safely to the atmosphere.

Question 2

What is an individual vent (back vent)?

Answer: A vent pipe that connects to the drain pipe of a single fixture and extends to the main vent stack or open air, protecting only that fixture's trap.

Question 3

What is a common vent?

Answer: A single vent pipe that serves two fixture drains installed at the same level on opposite sides of a wall, connecting them at the junction of their drain pipes.

Question 4

What is a wet vent?

Answer: A pipe that serves simultaneously as both a vent and a drain for one or more fixtures, typically used in bathroom groups to reduce the number of vent pipes required.

Question 5

What is a circuit vent?

Answer: A branch vent that serves two or more traps on a horizontal branch drain, connected at the most downstream fixture and running upward to the vent stack.