Why It's Worth Passing in Chicago
- Median plumber salary in Chicago: $68,400/yr
- Experienced earners: up to $98,000/yr
- Local job growth: +5%
- Open positions: 2,100+
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.
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1. What is the maximum distance a fixture can be from a vent? (Plumbing Code)
- A. 3 feet
- B. 5 feet
- C. Varies by pipe size
- D. 10 feet
Answer: C — Varies by pipe size
The maximum distance varies based on pipe diameter, following code tables for proper venting.
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2. What is the standard height for a bathroom sink drain? (Fixtures)
- A. 16 inches
- B. 18 inches
- C. 24 inches
- D. 30 inches
Answer: B — 18 inches
Standard bathroom sink drains are typically 18 inches from the floor.
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3. What tool is used to cut copper pipe? (Fixtures)
- A. Hacksaw only
- B. Pipe cutter or hacksaw
- C. Wire cutters
- D. Bolt cutters
Answer: B — Pipe cutter or hacksaw
Copper pipe can be cut with a tube cutter for clean cuts or a hacksaw for quick work.
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4. What is the maximum flow rate for a low-flow toilet? (Fixtures)
- A. 1.0 GPF
- B. 1.6 GPF
- C. 3.5 GPF
- D. 5.0 GPF
Answer: B — 1.6 GPF
Modern low-flow toilets use a maximum of 1.6 gallons per flush (GPF).
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5. What is the recommended temperature setting for a water heater? (Safety)
- A. 100°F
- B. 120°F
- C. 140°F
- D. 160°F
Answer: B — 120°F
120°F is recommended to prevent scalding while providing adequate hot water and energy efficiency.
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6. What is the purpose of an air gap in a plumbing system? (Safety)
- A. Allow air for breathing
- B. Prevent backflow contamination
- C. Increase water pressure
- D. Cool hot water
Answer: B — Prevent backflow contamination
An air gap is the most reliable method of backflow prevention, creating a physical break between the water outlet and flood level.
A Study Plan That Fits a Chicago 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 Illinois 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 Chicago
Chicago plumbers benefit from strong union contracts and year-round work on the city's massive infrastructure.
Plumber Exam Questions from Chicago Candidates
How much do plumbers make in Chicago?
The median plumber salary in Chicago, IL is $68,400. Entry-level roles start near $40,000 and experienced licensees reach $98,000. Passing the licensing exam is the gate to the upper half of that range.
Where can I take the plumber exam near Chicago?
Chicago, IL candidates test at state-approved centers scheduled through the Illinois licensing board or its exam vendor. Local programs such as UA Local 130 or Washburne Trade School can point you to the nearest seat and confirm the paperwork you need before applying.
How long should I study before testing in Illinois?
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 Chicago?
Yes — 2,100+ open positions with +5% projected growth. Chicago plumbers benefit from strong union contracts and year-round work on the city's massive infrastructure.
Do these practice questions copy the real Illinois exam?
No. Every question is original CraftPATH material written against published exam outlines and the code books Illinois has adopted. The format matches the real test, the content does not reproduce licensed exam material.
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