Why It's Worth Passing in Raleigh
- Median plumber salary in Raleigh: $53,200/yr
- Experienced earners: up to $82,000/yr
- Local job growth: +8%
- Open positions: 900+
What to Expect on the Exam
The plumber licensing exam covers code requirements, technical fundamentals, safety standards, and applied calculations. CraftPATH's free prep mirrors the real exam format with multiple-choice questions, instant feedback, and topic-by-topic drills.
Plumbing Code
International Plumbing Code (IPC), Uniform Plumbing Code (UPC), local amendments, and code compliance for residential and commercial projects.
Drainage Systems
Drain-waste-vent (DWV) systems, pipe sizing, slope calculations, trap requirements, and venting methods.
Water Supply
Water distribution design, pipe sizing, pressure calculations, backflow prevention, and water heater installation.
Fixtures & Appliances
Fixture unit calculations, installation requirements, accessibility standards, and appliance connections.
Safety & Materials
Material specifications, joining methods, OSHA safety requirements, and excavation safety.
- Length: 80–110 questions
- Time limit: 4–5 hours
- Passing score: 70–75%
- Exam fee: $50–$150 (state-dependent)
- Format: Open-book (IPC/UPC code book allowed in most states)
Sample Plumber Practice Questions
Six questions from the free plumber bank, with the answer and the reasoning behind it.
-
1. What causes gurgling sounds in drains? (Drainage Systems)
- A. High water pressure
- B. Inadequate venting
- C. Hot water
- D. New pipes
Answer: B — Inadequate venting
Gurgling sounds indicate inadequate venting, causing air to be pulled through trap water seals.
-
2. What is the minimum slope for a 3-inch drain pipe? (Plumbing Code)
- A. 1/8 inch per foot
- B. 1/4 inch per foot
- C. 1/2 inch per foot
- D. 1 inch per foot
Answer: B — 1/4 inch per foot
Pipes 3 inches or smaller require a minimum slope of 1/4 inch per foot.
-
3. What does Schedule 40 refer to in PVC pipe? (Plumbing Code)
- A. Installation schedule
- B. Wall thickness rating
- C. Pipe color
- D. Maximum length
Answer: B — Wall thickness rating
Schedule 40 refers to the wall thickness of PVC pipe, suitable for most residential DWV applications.
-
4. What is cross-connection in plumbing? (Safety)
- A. Crossing pipes for aesthetics
- B. Any connection between potable and non-potable water
- C. Two drains merged
- D. Parallel pipe runs
Answer: B — Any connection between potable and non-potable water
A cross-connection is any physical connection between potable water and a source of contamination.
-
5. What is indirect waste? (Drainage Systems)
- A. Waste from outside
- B. Drain that discharges into a receptor with an air gap
- C. Slow drainage
- D. Blocked waste line
Answer: B — Drain that discharges into a receptor with an air gap
Indirect waste piping discharges into a floor drain or receptor through an air gap to prevent backflow.
-
6. What is a grease trap? (Drainage Systems)
- A. A trap for rodents
- B. A device that intercepts fats and grease before they enter drainage
- C. A type of P-trap
- D. A cleaning tool
Answer: B — A device that intercepts fats and grease before they enter drainage
Grease traps intercept fats, oils, and grease from kitchen wastewater to prevent drain blockages.
A Study Plan That Fits a Raleigh Work Week
- Weeks 1–2: untimed topic drills across every domain to find weak areas.
- Weeks 3–5: work the weak topics with the code book open, timing each lookup.
- Weeks 6–8: timed full-length rounds until you hold 85% consistently.
- Final week: review missed questions and confirm your North Carolina application status.
- Know your local plumbing code — IPC vs UPC varies by state
- Master pipe sizing tables and fixture unit calculations
- Practice DWV system layout questions extensively
- Memorize key code sections for quick reference during the exam
Local Context for Raleigh
Raleigh-Durham is one of the fastest-growing metros in the U.S., creating strong residential plumbing demand.
Plumber Exam Questions from Raleigh Candidates
How much do plumbers make in Raleigh?
The median plumber salary in Raleigh, NC is $53,200. Entry-level roles start near $32,000 and experienced licensees reach $82,000. Passing the licensing exam is the gate to the upper half of that range.
Where can I take the plumber exam near Raleigh?
Raleigh, NC candidates test at state-approved centers scheduled through the North Carolina licensing board or its exam vendor. Local programs such as UA Local 421 or Wake Tech Plumbing can point you to the nearest seat and confirm the paperwork you need before applying.
How long should I study before testing in North Carolina?
Most candidates give it 8 to 12 weeks at about an hour a night: untimed topic drills first, then code-book lookups against a clock, then full-length timed rounds until you hold 85% or better.
Is there demand for plumbers in Raleigh?
Yes — 900+ open positions with +8% projected growth. Raleigh-Durham is one of the fastest-growing metros in the U.S., creating strong residential plumbing demand.
Do these practice questions copy the real North Carolina exam?
No. Every question is original CraftPATH material written against published exam outlines and the code books North Carolina has adopted. The format matches the real test, the content does not reproduce licensed exam material.
Start Studying — It's Free