Plumbing Code Definitions Practice Questions
The terms both codes are written in: building drain and sewer, traps and seals, vent types, backflow, air gaps and breaks, developed length, plus isometric drawings and scale.
100 questions in 2 hours, scored against the 70% pass mark, with a score for definitions so you know where you stand.
Free definitions drillA vent that also receives the discharge of waste from other fixtures is a:
Code Definitions and Plan Reading on the journeyman plumber exam
TSBPE’s review course tells candidates to start with the definitions chapter, because the exam uses only correct code terms. ICC lists code definitions and plan reading under Administration and General Regulations, 40% of the G25 exam.
- On our mocks
- Texas: 8 of 100 on our Texas mock · ICC G25: 7 of 70 on our ICC G25 mock
- Our drill
- 10 questions from 36 definitions questions, untimed, an explanation and code reference after every answer; one free attempt, unlimited with a pass
What definitions questions test
- Drainage terms: building drain, building sewer, horizontal branch, stack, branch interval, sump, indirect waste and dead end
- Traps and vents: trap seal, trap arm, crown weir, stack vent versus vent stack, individual, common, wet and relief vents
- Water terms: water service, fixture supply, potable water, cross connection, backflow, backsiphonage and backpressure
- Code words with exact meanings: approved, accessible versus readily accessible, developed length, flood level rim and critical level
- Plan reading: isometric riser diagrams and scale measurements
Sit the full exam under the real clock
100 questions in 2 hours, scored against the 70% pass mark, with a score for definitions so you know where you stand.
Free definitions drillHow to study it
- Learn the pairs that sound alike: stack vent and vent stack, air gap and air break, accessible and readily accessible.
- Write each term in your own words, then check it against your code’s definitions chapter.
- Practise reading an isometric drawing of a bathroom group until you can trace every drain and vent.
Common questions
How many definition questions are on the exam?
TSBPE does not publish weights for the Texas exam; our Texas mock has 8 definition questions. ICC puts definitions inside Administration and General Regulations (40% of G25); our ICC mock has 7.
Do the IPC and UPC define terms the same way?
Mostly, though wording and a few details differ, such as how far the building drain extends beyond the wall. The questions here use definitions the two codes share unless a question is marked as IPC only.
100 questions in 2 hours, scored against the 70% pass mark, with a score for definitions so you know where you stand.
Free definitions drillThe other sections
- General Regulations, Testing and Plumbing Math
- Pipe Materials and Joints
- Plumbing Fixtures
- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage
- Vents
- Traps, Interceptors and Separators
- Storm Drainage
- Fuel Gas Piping
- Texas Plumbing License Law and Board Rules
- Texas practice exam (100 questions, 2 hours)
- ICC G25 practice exam (70 questions, 4 hours)
- Free Texas mixed drill
Sources
- Pearson VUE: Texas State Board of Plumbing Examiners (retake waits, practical, five attempts)
- TSBPE Candidate Handbook, August 2025 (exam table, fees, 70% passing score, test-center rules)
- TSBPE Journeyman Plumber Examination Review Course, rev 09/2025 (format, codes, chapters, sample questions)
- TSBPE Administrative Rules, March 2026 (22 TAC §§363.5, 363.22, 365.1, 367.2)
- TSBPE proposed amendment to §367.2 (2021 IPC and UPC), Texas Register, August 14, 2026
- TSBPE Strategic Plan 2025-2029 (examination statistics, p. 14)
- ICC National Contractor/Trades Examination Information Bulletin, published June 30, 2026 (G25 Journeyman Plumber)
- ICC Support: What is a passing score?
Original practice questions written to the TSBPE Journeyman Plumber Examination Review Course, ICC’s G25 content outline and the 2018 International Plumbing Code and Uniform Plumbing Code; they are not exam questions and quote no code text. Independent practice, not affiliated with or endorsed by the Texas State Board of Plumbing Examiners, the International Code Council, IAPMO or Pearson VUE.