General Regulations, Testing and Plumbing Math Practice Questions
Protecting pipe from damage, freezing and corrosion, notching and boring framing, hanger spacing, trenching, DWV and water testing, permits and inspections, and the math of grade, offsets and head pressure.
100 questions in 2 hours, scored against the 70% pass mark, with a score for general regulations so you know where you stand.
Free general regulations drillA building sewer must fall from an invert of 4 feet below grade at the building to a public sewer tap 7 feet below grade, 72 feet away. What is the slope?
General Regulations, Testing and Plumbing Math on the journeyman plumber exam
The general regulations chapter covers how plumbing is installed everywhere in the building: what may and may not be used, protection of pipe, structural cutting, supports and testing. TSBPE lists these subjects in its review course, and ICC’s largest content area, Administration and General Regulations (40%), includes general installation requirements and testing.
- On our mocks
- Texas: 12 of 100 on our Texas mock · ICC G25: 13 of 70 on our ICC G25 mock
- Our drill
- 10 questions from 44 general regulations questions, untimed, an explanation and code reference after every answer; one free attempt, unlimited with a pass
What general regulations questions test
- Protection: pipe through and under walls, sleeves, corrosion protection, freezing, and shield plates over pipe in framing
- Structure: notching and boring limits for joists and studs under the building code the plumbing code refers to
- Supports: hanger spacing for PVC, ABS, PEX, CPVC, copper, steel and cast iron, and dissimilar metals
- Trenching and backfill, and connection to public water and sewer
- Testing: the 10-foot water test and 5 psi air test for DWV, water supply tests, who supplies test equipment, and inspection before concealment
- Math: grade and fall, 45-degree offsets, head pressure (0.433 psi per foot), pipe volume and fitting allowances
Sit the full exam under the real clock
100 questions in 2 hours, scored against the 70% pass mark, with a score for general regulations so you know where you stand.
Free general regulations drillHow to study it
- Make a one-page table of hanger spacing and test pressures; they produce many quick questions.
- Learn the two head-pressure numbers: 0.433 psi per foot and 2.31 feet per psi.
- Work offset and grade problems with a tape and a calculator until each takes under a minute.
Common questions
What are the DWV test requirements?
Both codes accept a water test with at least a 10-foot head held for 15 minutes, or an air test at 5 psi held for 15 minutes.
Is there math on the journeyman plumber exam?
Grade, offsets and pressure come up in code questions and in the Texas practical layout. Our general regulations section includes plumbing math questions with worked answers.
100 questions in 2 hours, scored against the 70% pass mark, with a score for general regulations so you know where you stand.
Free general regulations drillThe other sections
- Code Definitions and Plan Reading
- 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.