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 (25)
✍️ Sample Journeyman Plumbers Exam Questions & Answers
1. It is necessary to pipe clear water waste from a potable source through an air gap, such as a relief valve on a water heater, to an indirect waste.
It is required to pipe clear water waste from a potable water system to an indirect waste and discharge it through an air gap. This is as easy as terminating the discharge pipe of a floor drain six inches above the strainer.
2. What is required when a water heater is installed in an area subject to flooding or where the unit could be submerged?
Water heaters must be elevated above the base flood elevation (BFE) in flood-prone areas to prevent submersion, which could damage the unit and create hazards from gas leaks or electrical faults.
3. In pipe measurement, the dimension that must be subtracted from a center-to-center measurement to determine the exact cut length of the pipe is known as:
The fitting allowance, or take-off, is the length from the center of a fitting to the face of the fitting's socket or hub. This amount is subtracted from the center-to-center measurement for each fitting used to find the precise cut length of the pipe.
4. At what minimum storage temperature is Legionella bacteria effectively inhibited in a hot water system?
Legionella bacteria are killed at 140°F (60°C); storing domestic hot water at or above this temperature prevents bacterial colonization and growth in the system.
5. A Temperature and Pressure (T&P) relief valve on a water heater must have its temperature-sensing element installed in a specific location to function correctly. Where must this element be located?
The T&P valve's temperature-sensing element must be immersed in the hottest water of the tank to provide accurate protection against excessive temperatures. The hottest water is always in the top 6 inches of a storage-type water heater. Installing it elsewhere could create a thermal lag, delaying its activation and creating a safety hazard.
6. Which of the following locations is strictly prohibited for the installation of gas piping according to the International Fuel Gas Code?
The IFGC explicitly prohibits the installation of gas piping in or through circulating air ducts, clothes chutes, chimneys, gas vents, dumbwaiters, or elevator shafts. A gas leak in these locations could quickly and dangerously spread throughout the building.