Free practice exam
Texas · TCEQ occupational licenses

Practice exams for Texas operator licenses, at the pace of the real terminal.

Most practice tests rush you through 100 questions in an hour. The real exam gives you three hours. Every exam here runs at that pace, with nothing in front of you but a calculator, and then shows you the work on every answer, your score by topic, and the module and page of the course manual each question comes from. The real exam tells you pass or fail and nothing else.

Start the Class D water practice exam Free · 50 questions · 90 minutes · no sign-up to start

Exams

Available TCEQ · Water Operator

Class D Water Operator

36%passed in the most recent quarter TCEQ reported (896 sittings)

50 questions, 90 minutes, Study mode with the formula sheet, score by eight topics, nine math problems worked line by line.

Free practice exam
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OSSF Installer I

The first practice exam for the Texas septic installer license. Written to TCEQ's Installer I curriculum, same terminal-style sitting.

Coming TCEQ · Wastewater Operator

Class D Wastewater Operator

Written to TCEQ's Basic Wastewater Operations curriculum. Same engine, same pacing.

Coming TCEQ · Water Operator

Class C Water Operator

Groundwater, surface water and distribution Class C, the exams most Class D operators sit next.

How every exam here works

Exam pace

The clock matches the real test: about 1.8 minutes a question. Rehearsing at triple speed teaches you to skim and guess, and the real exam punishes exactly that.

The formula sheet

Every conversion and formula the exam math draws on, in a side panel in Study mode. Knowing which line to reach for is the skill. TCEQ does not publish what reference material, if any, is at the terminal, so Exam mode runs without it.

Every answer explained, and cited

Math worked line by line. Regulatory values cited to the Texas rule. And every question names the module, section and page of the TEEX course manual it comes from, so you can open the book you already own and check.

Score by topic

The real exam reports pass or fail. Yours shows where the points went, so you study the right chapter before paying the fee again.

Are these the real TCEQ questions?

No. TCEQ's exam items are confidential. These are original questions written to each license's course manual and the state rules, and each one cites the manual section and page it comes from. Anyone selling "actual exam questions" is selling something they should not have or do not have.

Do I need to sign up?

Not to start. When you submit, your score and the worked answers unlock with an email address, and that is where the printable answer key goes. No newsletter.

Who makes these?

Operator Exam Prep builds practice exams for Texas TCEQ operator licenses. We are not affiliated with TCEQ or any state agency. Questions, corrections, or seats for a whole crew: reply to any email from us.