RETA CIRO Certified Industrial Refrigeration Operator Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the RETA CIRO Certified Industrial Refrigeration Operator Vocabulary Game
A free word game for the RETA CIRO Certified Industrial Refrigeration Operator exam. Each round shows a clue for one of 20 exam terms across 8 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the RETA CIRO Certified Industrial Refrigeration Operator Vocabulary Game
Workplace hazards
Electricity
Heat Flow
Monitoring System Performance
Valves, Controls and DX Systems
Liquid Overfeed and Flooded Systems
Two-Stage and Secondary Coolant Systems
Coil ice removal
Sources for these terms (15)
- 1910.119 - Process safety management of highly hazardous chemicals · Source checked 2026-11-04
- 1910.1200 - Hazard Communication · Source checked 2026-11-04
- Risk Management Program (RMP) Rule · Source checked 2026-11-04
- Improving Motor and Drive System Performance: A Sourcebook for Industry · Source checked 2026-11-04
- Incorporate Minimum Efficiency Requirements for Heating and Cooling Products into Federal Acquisition Documents · Source checked 2026-11-04
- DOE Fundamentals Handbook: Thermodynamics, Heat Transfer, and Fluid Flow, Volume 1 · Source checked 2026-11-04
- Next-Generation Transcritical CO2 Refrigeration · Source checked 2026-11-04
- Walk-In Coolers and Freezer Refrigeration Systems NOPR · Source checked 2026-11-04
- Walk-in Coolers and Freezers (WICF) NOPR Technical Support Document · Source checked 2026-11-04
- Test Procedure for Central Air Conditioners and Heat Pumps · Source checked 2026-11-04
- Basic Ammonia Refrigeration, Module 3 - Evaporators · Source checked 2026-11-04
- Basic Ammonia Refrigeration, Module 7 - Control Valves · Source checked 2026-11-04
- Improving Pumping System Performance: A Sourcebook for Industry · Source checked 2026-11-04
- Advanced Refrigeration Technologies · Source checked 2026-11-04
- Chapter 2: Refrigerated Condensers · Source checked 2026-11-04
About the RETA CIRO Exam
RETA CIRO is the advanced Certified Industrial Refrigeration Operator credential. CIRO verifies that an operator has the experience, knowledge, and judgment needed to supervise industrial ammonia refrigeration system operations, including multi-compressor plants, two-stage and secondary coolant systems, and PSM/RMP-regulated facilities.
Exam sponsor: Refrigerating Engineers and Technicians Association (RETA). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Single exam, 135 multiple-choice questions (125 scored + 10 pilot)
Time Limit
3 hours
Passing Score
70 (minimum passing score)
Reported exam pass rate: Not publicly disclosed. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the RETA CIRO vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the RETA CIRO vocabulary game work?
Each round shows a clue for one of 20 RETA CIRO terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the RETA CIRO terms come from?
OpenExamPrep researched each term from the Refrigerating Engineers and Technicians Association (RETA) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
How many questions are on the RETA CIRO exam and how long is the exam?
CIRO consists of 135 questions with a 3-hour time limit, per the current RETA CIRO Exam Information Handbook and the 2026 CIRO page. CIRO includes 10 pilot questions that are evaluated for future exams and do not count in the candidate's score; candidates are scored on the remaining 125 active questions. The minimum passing score is 70.
What experience is required to take the RETA CIRO exam?
RETA requires a minimum of two years of verified experience in industrial refrigeration plant operation or services as a technician, including maintenance, service, troubleshooting, system start-ups, and/or direct supervision. A supervisor, superior, or colleague must sign the CIRO Verification of Experience form as part of the application.