Journeyman Plumber – National Portion exam
Try 10 realistic plumbing code and installation questions aligned with the Journeyman Plumber – National Portion exam.
Answer each question, then click “Check my score” at the bottom of the page. You’ll see your total score plus the correct answers for every item.How this free practice exam works
This 10-question mini-exam is designed to mirror the style and cognitive level of the Journeyman Plumber – National Portion exam, with a focus on commonly adopted plumbing code principles, drainage and venting, trap seals, and backflow prevention.- Choose one answer for each multiple-choice question.
- Click “Check my score” to see how you did.
- Instant feedback shows which questions are correct or incorrect and reveals the right answers.
This practice content is for exam preparation only and is not endorsed or approved by any state licensing board, code authority, or testing provider. Always refer to the most current plumbing code and your jurisdiction’s amendments.
Journeyman Plumber – National Portion exam (10 Questions)
Horizontal drainage piping that is 3 inches in diameter is typically required to be installed with a minimum slope to maintain proper flow. Based on commonly adopted plumbing codes, that minimum slope is:
For fixtures such as lavatories and sinks, what is the primary function of the trap installed in the waste outlet?
The primary purpose of the vent system in a plumbing installation is to:
A potable water supply is connected to a boiler that could allow contaminated water to flow back into the domestic system if pressure changes occur. A typical method to protect against backflow in this situation is to install a:
A building drain is defined in plumbing codes as that part of the lowest piping of a drainage system that:
When a horizontal branch drain ties into a vertical stack, which fitting is most commonly shown in plumbing codes as acceptable for that connection?
A floor-mounted water closet is being rough-in installed. According to common code requirements, the center of the closet flange is typically set:
A hose bibb located outdoors needs protection against back-siphonage. Which device is commonly used for this purpose?
A hydrostatic test of a drainage and vent system is typically performed by:
For interior water distribution in a dwelling, which of the following is generally considered suitable for domestic hot and cold water piping when installed in accordance with the manufacturer’s instructions and applicable code?