New Jersey Master Plumber Exam Prep

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Official sitting

New Jersey Master Plumber exam at a glance

The New Jersey Master Plumber exam has 100 questions and a time limit of 3 hours 15 minutes. That works out to about 2 minutes per question. The passing score is 70%. Figures are from the official candidate bulletin, checked October 13, 2026.

Questions100
Time3 hours 15 minutes
Passing score70%

Confirm question count, time, open-book rules, and passing score on the live board bulletin before you sit. We do not guarantee a passing result. Source: PSI NJ Master Plumber bulletin 3985 (3/9/2026); N.J.A.C. 13:32-2.3, checked October 13, 2026. How we source exam facts

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What’s included

35,000+ word study guide

Worked calculations, code-section breakdowns, exam traps, a key-terms glossary and a 30/60/90-day plan.

4 full-length practice exams

Original questions weighted to match the topic mix of the real exam.

400 practice questions

Every one with a written explanation and the code section behind the answer.

Same study guide and four exams on every term. You are choosing how long you can log in.

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What this prep covers

  1. Start Here: The New Jersey Master Plumber Sitting
  2. General Knowledge (7 of 100 questions)
  3. Materials, Uses, and Specifications (17 of 100 questions)
  4. Traps, Interceptors, and Backflow Prevention (15 of 100 questions)
  5. Plumbing Fixtures, Fixture Fittings, and Plumbing Appliances (13 of 100 questions)
  6. Water Supply Systems (12 of 100 questions)
  7. Drains and Waste (15 of 100 questions)
  8. Specialty Plumbing (4 of 100 questions)
  9. Safety (7 of 100 questions)
  10. Vent Systems (10 of 100 questions)
  11. Quick Reference and Exam Day

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Common questions about this exam

How many questions are on the New Jersey Master Plumber exam?

The New Jersey Master Plumber exam has 100 questions and a time limit of 3 hours 15 minutes, about 2 minutes per question. The passing score is 70%. Check the current board bulletin before you book.

How much practice does this prep include?

It includes 4 full-length practice exams and 400 practice questions in total. Every question has a written explanation naming the code section the answer comes from.

How long is the study guide?

The New Jersey Master Plumber guide runs to roughly 35,019 words in 11 sections, starting with “Start Here: The New Jersey Master Plumber Sitting” and ending with “Quick Reference and Exam Day”.

How long do I get access?

Choose 30, 60 or 90 days at checkout. Your days do not start at checkout: they begin the first time you open the course (or 14 days after purchase, whichever comes first). Access works on any device, and you can retake every practice exam as often as you like. Days remaining are shown in your dashboard and you can extend at any time.

Is this an official New Jersey Master Plumber exam?

No. This is independent preparation material. It is not affiliated with or endorsed by any state licensing board or exam vendor, and it does not contain real exam questions. Always confirm current requirements with your licensing board.

About this prep

This prep is built specifically for the New Jersey Master Plumber examination and includes a 35,000+-word study guide written for this exam, 4 full-length practice exams and 400 practice questions, each with a written explanation.

How access works

You are paying for access length (30, 60, or 90 days). The study guide and four timed exams are the same on every term. Your days start the first time you open the course, not at checkout (or 14 days after purchase, whichever comes first), and access works on any device for that term.

Not affiliated with or endorsed by any state licensing board or exam vendor. For exam-preparation purposes only.