Oklahoma Plumbing Contractor Exam Prep

Choose your access term

Your access starts when you do: the days begin the first time you open the course, not at checkout (or 14 days after purchase, whichever comes first).

Business & Law is 75% off with this classification. Add it only if you want it, for the same term: $24.75 for 30 days, $32.25 for 60 days, $42.25 for 90 days.

Official sitting

Oklahoma Plumbing Contractor exam at a glance

The Oklahoma Plumbing Contractor exam has 85 questions and a time limit of 3 hours. That works out to about 2.1 minutes per question. This Oklahoma license also requires the state’s separate Business & Law exam. Figures are from the official candidate bulletin.

Questions85
Time3 hours

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 OK bulletin 634 (effective 9/11/2026); OAC 158:30-9-1. How we source exam facts

All Oklahoma exams ›

What’s included

18,000+ 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.

340 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.

Instant accessSecure checkoutBuilt on current codes
SKU: N/A Category:

What this prep covers

  1. Oklahoma plumbing contractor and natural gas
  2. What this license is, and what it is not
  3. The eighty-five items
  4. Head pressure, area, and a trench
  5. Offsets
  6. Job cost, because this is the contractor paper
  7. Pipe, joints, and the structural members you do not ruin
  8. Fixtures
  9. Water supply and backflow
  10. Drains, sewers, and the machines that lift them
  11. Vents, the long block
  12. Traps, interceptors, and indirect waste
  13. Isometrics
  14. Fuel gas on a plumbing contractor paper
  15. Safety, four items, most of them about the trench
  16. A small commercial restroom, as the contractor
  17. What to memorize, and what to look up
  18. A sizing walk that uses the book you are allowed to open
  19. Water heaters in the contractor's scope
  20. Commercial kitchens
  21. Storm and roof drains
  22. Tests, inspections, and the order of the work
  23. Fittings, named correctly
  24. Reading a bad isometric on purpose
  25. Backflow, told as jobs rather than as a list
  26. Ejectors, basins, and the vent you cannot skip
  27. Parallel heaters, mixing, and scald protection
  28. Cleanouts, manholes, and thrust
  29. Corrosion, dielectric separation, and hangers you can defend
  30. Public fixture counts without a memorized restaurant
  31. Trench judgment
  32. How the four calculations show up in a bid
  33. A service call that is still this examination
  34. The week of the examination
  35. Stacks, suds, and relief vents
  36. A wet-vent drill with printed units
  37. The water service, from the tap to the first valve
  38. Change orders and the second price
  39. What a final walk looks like
  40. Joints you can test
  41. Flush valves, carriers, and the pressure they actually need
  42. Food-service connections that are not the grease trap
  43. Horizontal storm leaders
  44. A gas test you can describe without a single memorized psi
  45. The people you send into the building

Related Oklahoma exams

More Oklahoma exam prep

Common questions about this exam

How many questions are on the Oklahoma Plumbing Contractor exam?

The Oklahoma Plumbing Contractor exam has 85 questions and a time limit of 3 hours, about 2.1 minutes per question. Check the current board bulletin before you book.

Do I also need the Business & Law exam in Oklahoma?

Yes. This Oklahoma license also requires the state’s separate Business & Law exam. That exam has 50 questions, 2 hours. Oklahoma Business & Law prep is 75% off when you add it to this classification for the same term.

How much practice does this prep include?

It includes 4 full-length practice exams and 340 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 Oklahoma Plumbing Contractor guide runs to roughly 18,690 words in 45 sections, starting with “Oklahoma plumbing contractor and natural gas” and ending with “The people you send into the building”.

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 Oklahoma Plumbing Contractor 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 Oklahoma Plumbing Contractor examination and includes a 18,000+-word study guide written for this exam, 4 full-length practice exams and 340 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.