Why It's Worth Passing in Charlotte
- Median plumber salary in Charlotte: $52,500/yr
- Experienced earners: up to $81,000/yr
- Local job growth: +7%
- Open positions: 1,100+
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 is the typical lifespan of a water heater? (Water Supply)
- A. 3-5 years
- B. 8-12 years
- C. 20-25 years
- D. 50+ years
Answer: B — 8-12 years
Traditional tank water heaters typically last 8-12 years with proper maintenance.
-
2. What is the purpose of a vacuum breaker? (Safety)
- A. Create a vacuum
- B. Prevent backflow by breaking vacuum conditions
- C. Increase suction
- D. Test pipe integrity
Answer: B — Prevent backflow by breaking vacuum conditions
Vacuum breakers prevent backsiphonage by admitting air into the line when negative pressure occurs.
-
3. What is the minimum slope required for a 4-inch horizontal drain pipe? (Drainage Systems)
- 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
A 4-inch drain requires a minimum slope of 1/4 inch per foot for proper drainage.
-
4. Which material is NOT commonly used for water supply lines? (Plumbing Code)
- A. Copper
- B. PEX
- C. Cast iron
- D. CPVC
Answer: C — Cast iron
Cast iron is used for drainage, not water supply. Copper, PEX, and CPVC are common supply line materials.
-
5. What size pipe is typically used for a toilet drain? (Fixtures)
- A. 2 inches
- B. 3 inches
- C. 4 inches
- D. 6 inches
Answer: B — 3 inches
Toilet drains typically require a minimum 3-inch pipe to handle waste properly.
-
6. Which valve type allows flow in only one direction? (Water Supply)
- A. Gate valve
- B. Ball valve
- C. Check valve
- D. Globe valve
Answer: C — Check valve
Check valves allow water to flow in one direction only, preventing backflow.
A Study Plan That Fits a Charlotte 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 Charlotte
Charlotte is one of the fastest-growing cities in the Southeast, creating steady residential plumbing demand.
Plumber Exam Questions from Charlotte Candidates
How much do plumbers make in Charlotte?
The median plumber salary in Charlotte, NC is $52,500. Entry-level roles start near $32,000 and experienced licensees reach $81,000. Passing the licensing exam is the gate to the upper half of that range.
Where can I take the plumber exam near Charlotte?
Charlotte, 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 CPCC Skilled Trades 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 Charlotte?
Yes — 1,100+ open positions with +7% projected growth. Charlotte is one of the fastest-growing cities in the Southeast, creating steady 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