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Safety & Trades Practice Questions

Plumber Practice Test Practice Questions

Journeyman Plumber Licensing Exam — Practice with free plumber licensing questions covering drainage and venting, traps, water supply, water heaters, fixtures, code lookup, and jobsite safety. Most journeyman plumber exams use multiple-choice questions, commonly around 80-100 total, with a 3-4 hour limit and a passing score near 70%; fees, approved code books, and open-book rules vary by state or local jurisdiction.

100
Total Questions
3-4 hours
Time Limit
Commonly 70%
Passing Score
Varies by jurisdiction
Registration Fee

Free Sample Questions

Here are 5 free sample questions from our full bank of 550+ Plumber Practice Testpractice questions. Try them out below — click "Show Answer" to reveal the correct response and explanation.

1

A plumber is installing a trap for a lavatory. What is the main purpose of the trap seal?

ATo increase the water pressure at the fixture
BTo block sewer gases from entering the building
CTo reduce the diameter of the drain line
DTo prevent hot water from entering the drain
2

Which fitting is generally preferred when changing direction from a horizontal drain to another horizontal drain in a drainage system?

AA sanitary tee installed on its back
BA straight coupling with no sweep
CA threaded bushing
DA long-sweep quarter bend or wye with appropriate bend
3

A water heater temperature and pressure relief valve discharge pipe should normally terminate in which way?

APointed downward to an approved location without threads or a valve at the end
BConnected directly into the building drain with no air gap
CCapped so water cannot escape during a nuisance discharge
DReduced to a smaller pipe size to limit discharge volume
4

What is the best reason for properly venting a plumbing drainage system?

AVents carry potable water to upper floors
BVents increase the slope of horizontal drain piping
CVents admit air so traps are not siphoned and drainage flows properly
DVents eliminate the need for cleanouts
5

Before cutting into an existing water supply line in an occupied building, what should the plumber do first?

AHeat the pipe to dry any standing water
BShut off the water supply and verify the line is depressurized
CDrill a small hole to see whether the pipe is active
DLoosen the nearest fixture trap

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About the Plumber Practice Test

Format & Structure

Total Questions
100
Time Limit
3-4 hours
Format
Multiple choice; often open-book code reference

Scoring & Cost

Passing Score
Commonly 70%
Registration Fee
Varies by jurisdiction

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Frequently Asked Questions

What is on a journeyman plumber licensing exam?

Most journeyman plumber licensing exams cover plumbing code, drainage and venting, water supply sizing, fixtures, traps, indirect waste, fuel gas basics in some jurisdictions, safety, and trade math. The exact outline depends on the state, city, county, or licensing board, so check your candidate bulletin before you schedule.

How many questions are on the plumber license test?

A typical journeyman plumber license test has around 80 to 100 multiple-choice questions, though some jurisdictions use a different count or split the assessment into code and practical sections. The plumber practice test on this page is designed to match the style of questions you are likely to see, not one single state's exact form.

How much time do I get on the journeyman plumber exam?

Many journeyman plumber exams allow about 3 to 4 hours. That time can disappear quickly when you are checking vent distances, fixture unit tables, slope rules, and code definitions. Timed practice helps you learn when to look up a rule and when to trust a concept you already know.

What score do I need to pass?

A passing score of 70% is common for journeyman plumber licensing exams, but it is not universal. Some boards scale scores or use vendor-specific scoring rules. Always use your local licensing authority's current bulletin as the final source for pass marks.

Is the journeyman plumber test open book?

Many plumber licensing exams are open book for an approved plumbing code, but rules vary. Some boards specify the UPC, IPC, state amendments, or a local code book, and they may limit tabs, handwritten notes, or loose papers. Open book still requires speed because you need to know where the rule lives.

How much does a plumber licensing exam cost?

Costs vary by jurisdiction and testing vendor. You may pay an application fee, a testing fee, and a separate license fee after passing. Before budgeting for a test date, check the current fee schedule from your state or local plumbing board.

How should I use a plumber practice test to study?

Start with untimed questions so you can slow down, read the explanations, and connect each miss to the right code topic. Then move into timed sets. A journeyman plumber practice test is most useful when every missed item turns into a short review session on traps, vents, fixtures, pipe sizing, or safety.

What code book should I study for the plumber exam?

Use the code edition listed by your licensing board. Depending on where you live, that may be the International Plumbing Code, Uniform Plumbing Code, a state plumbing code, or local amendments. Studying the wrong edition can waste time because fixture unit tables, venting rules, and administrative requirements may not match your test.

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