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Master / Journeyman Plumber Practice Test

392 practice questions across 13 topics, each with a written explanation of why the correct answer is correct. Start below — the first questions are free and no account is required.

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Topics on the Master / Journeyman Plumber exam

Sample Master / Journeyman Plumber questions

Drainage Systems

According to the IPC, what is the drainage fixture unit (DFU) value for a residential water closet (1.6 gpf or less)?

  1. A. 2 DFU
  2. B. 3 DFU
  3. C. 4 DFU
  4. D. 6 DFU

Answer: B. IPC Table 709.1 assigns a value of 3 DFU to a water closet (flush tank, 1.6 gpf or less). Older or higher flow toilets are rated at 4 DFU.

Venting

According to the IPC, every trap and trapped fixture shall be:

  1. A. Vented
  2. B. Provided with a cleanout
  3. C. Made of cast iron
  4. D. Located in the basement

Answer: A. IPC 901.2 states that every trap and trapped fixture shall be vented to protect the trap seal from siphonage and backpressure.

Traps & Cleanouts

What is the minimum liquid seal depth required for a fixture trap according to the IPC?

  1. A. 1 inch
  2. B. 2 inches
  3. C. 3 inches
  4. D. 4 inches

Answer: B. IPC 1002.1 requires a trap seal of not less than 2 inches and not more than 4 inches.

Work through every topic on the Master / Journeyman Plumber question directory, or start the timed practice test above.

Master / Journeyman Plumber exam — frequently asked questions

How many questions are on the Master / Journeyman Plumber exam?

The Master / Journeyman Plumber exam typically has 70–100 (varies by state). The exact count varies by state and exam version. VoltExam gives you 392 practice questions covering every topic tested.

What score do you need to pass the Master / Journeyman Plumber exam?

The passing score for the Master / Journeyman Plumber exam is typically 70–75%. Scoring significantly above the minimum on practice tests before exam day is strongly recommended to account for real-exam pressure.

What is the pass rate for the Master / Journeyman Plumber exam?

The estimated first-attempt pass rate for the Master / Journeyman Plumber exam is 60–70%. Candidates who complete structured practice sessions with full answer explanations pass at significantly higher rates.

How long should I study for the Master / Journeyman Plumber exam?

Most candidates study 4–8 weeks for the Master / Journeyman Plumber exam. Study time varies based on prior experience. Focusing on practice questions with explanations is the most time-efficient preparation method.

What topics are on the Master / Journeyman Plumber exam?

The Master / Journeyman Plumber exam covers topics including: Drainage Systems, Venting, Traps & Cleanouts, Water Supply, Fixtures, and 8 more topic areas. VoltExam's free study mode organizes 392 quick-study questions by concept so you can target weak areas efficiently.