Journeyman Plumbers Exam Study Guide 2026
Everything you need to pass the Journeyman Plumbers Exam exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Journeyman Plumbers Exam Exam Format at a Glance
📚 Journeyman Plumbers Exam Topics to Study (69)
✍️ Sample Journeyman Plumbers Exam Questions & Answers
1. A listed gas range requires a flexible connector. What is the maximum length allowed for a residential gas appliance connector?
ANSI Z21.24 and NFPA 54 allow gas appliance connectors up to 6 feet in length for residential ranges, dryers, and similar appliances.
2. How far must a vent pipe terminal extend above a roof that is used for purposes other than weather protection?
When a roof is used as a deck, garden, or other occupied space, vent terminals must extend at least 7 feet above the roof surface to protect occupants from sewer gases.
3. What is the minimum slope for a horizontal wet vent pipe?
Horizontal wet vent pipes must slope at least 1/4 inch per foot toward the drain to maintain proper flow and self-scouring velocity.
4. A pilot light that repeatedly goes out on a gas appliance most likely indicates a problem with:
The thermocouple generates a small voltage when heated by the pilot flame; if it fails or is positioned incorrectly, it causes the safety valve to close, extinguishing the pilot.
5. When reading an isometric drawing, a plumber sees two parallel pipes that must be offset around the same obstruction. What must be calculated for each pipe separately?
For parallel offsets, each pipe needs its own travel calculated, and the spread (center-to-center distance) must account for fitting dimensions.
6. An RPZ assembly must be installed how far above the floor or ground to allow for drainage and testing?
RPZ assemblies require a minimum of 12 inches of clearance above the floor to allow access for testing and to permit relief port drainage.