1.1 Current Exam Facts

1.1 Current Exam Facts

The Certified Industrial Refrigeration Operator (CIRO) credential is RETA's supervisor-level examination for people who already work in industrial refrigeration plants—most often anhydrous ammonia engine rooms in food, beverage, cold storage, and process facilities. RETA designed CIRO to assess the advanced concepts, principles, and applications required to supervise industrial refrigeration operators. It is not a beginner quiz and it is not a general HVAC license. Treat it as a nationally recognized demonstration that you can run and supervise a plant, not merely assist under someone else's ticket.

RETA's CIRO program is ANAB accredited as having met ANSI/ISO 17024 personnel-certification standards. RETA states that three of its four certifications are ANAB accredited; this course does not invent which of the remaining credentials share that status. What matters for CIRO is that an independent accreditation body continuously scrutinizes the exam's fairness, impartiality, and validity. Employers and regulators who recognize 17024-style credentials are looking for that third-party check, not a vendor's marketing badge.

Official sources to keep open while you study:

• CIRO page: reta.com/page/ciro
• 2026 CIRO Exam Information Handbook (Revision 07, valid for exams offered January 1 through December 31, 2026; last approved 01/02/2026): 2026 CIRO Exam Information Handbook PDF
• CIRO Content Outline (Revision 1, the standalone question-count table): CIRO Content Outline PDF
• Every handbook figure quoted in this guide comes from that 2026 revision. RETA re-issues the handbook each January, so re-download the file currently linked at the bottom of the CIRO page before you apply.

Sitting format and scoring

You will see 135 questions on the clock. Ten of those items are pilots RETA is evaluating for future forms. Only the 125 active items count toward your score. You will not be told which items are pilots. Answer every question; a blank and a wrong answer are equally worthless on a scored item, and you cannot know which ten are experimental.

RETA publishes the passing standard as a minimum passing score of 70 in the handbook and as 70% on the CIRO web page. Do not convert that into a homemade raw-count such as "88 of 125." RETA's score report states the percent of questions answered correctly and section subscores. This course does not invent a raw cut score, equating table, or first-time pass rate. RETA does not publish a first-time CIRO pass rate—treat any number you hear in a shop as unpublished gossip, not an official statistic.

Three hours for 135 items is about 80 seconds per question if you never pause. In practice you will spend longer on screen-based troubleshooting and less on a clean safety recall item. The interface lets you mark an item for later review, skip, and return. The test ends when you complete the submit sequence or when time expires.

Eight content areas (official outline)

The handbook lists these counts. Ten pilots are spread across multiple areas, so the 135-row outline is the blueprint you study against, not a promise that each area's live score uses exactly that integer.

Four blocks—Safety, Monitoring, Valves/Controls/DX, and Overfeed/Flooded—are 20 items each. Together they are 80 of 135 outline items. Defrost is the smallest published block at 10 items, which is still enough to fail a candidate who treats hot-gas sequence, drain pressure-relief regulators, and termination as optional trivia. Build study hours in proportion to those counts, then add extra time for screens, SDS, and property tables, because those tools cut across Monitoring, Heat Flow, and troubleshooting items.

RETA names these source texts as the basis for CIRO content:

• Industrial Refrigeration I
• Industrial Refrigeration II (Systems)
• Industrial Refrigeration IV (Plant Operation and Safety)
• Basic Electricity I
• Basic Electricity II (Ladder Diagrams)

Other books (Stoecker, IIAR materials, TPC modules, and similar) can help, but RETA does not endorse or guarantee that non-RETA titles cover every CIRO area. Use them as supplements, not as a substitute for the outline.

2026 fees, payment, and the application clock

Membership must be current at application to receive the member rate. If your company holds a corporate membership, you must be one of the company's designated members, and you must be signed into your own reta.com account before you start the application. RETA requires the candidate to complete and sign the application; do not have a supervisor fill it out in your name.

Payment is required before scheduling. Purchase orders must be paid in full before RETA will schedule. Personal or company checks go to RETA Certification, 1725 Ferry St SW, Albany, OR 97322; a returned check carries a $50 fee, and later remittance must be money order or certified check. One practice exam is included in the application fee (the link arrives after payment and processing). Additional practice attempts are $59 each. Practice tests use the same on-screen references as the live exam—use that sitting to learn the PDF, not just to chase a practice score.

Retest rules (stack them; they are easy to mix up):

1. The discounted retest applies only after a first unsuccessful attempt that occurred within the past year.
2. Member / non-member retest prices are $380 / $580 (the handbook describes this as two-thirds of the fee paid).
3. After retest approval and payment, you have 90 days to schedule and complete the retest.
4. Minimum time between testing sessions is two weeks.
5. If you fail the retest, the third exam is full price.
6. Each retest still requires a new application and fee.

Applications expire one year from the date of payment. Request a 90-day extension before that expiry. If you neither sit nor obtain an extension, the fee is forfeited. You may not transfer a registration to another person. If you withdraw at least five business days before a scheduled date, you may request a refund of up to half the RETA application fee. Fail to show without a timely reschedule and you can forfeit fees (reschedule mechanics are in the next section).

Two-year experience gate and the VOE

Before RETA will process a CIRO application you must have at least two years of experience in industrial refrigeration plant operation or services as a technician. Qualifying work includes maintenance, service, troubleshooting, system start-ups, and/or direct supervision of those tasks. A Verification of Experience (VOE) form must be completed by a supervisor, superior, or colleague who has personal knowledge of that experience. The VOE is not part of the online application. Email the completed form as a PDF to RETA certification staff (certification@reta.com in the handbook; the CIRO web page also lists certification@reta.org). No VOE, no processing, no scheduling.

Commercial HVAC-only time, supermarket rack work that is not industrial plant operation, or "I helped on weekends" that a verifier will not sign does not become two years because you want to sit CIRO. The verifier is attesting to industrial refrigeration plant or technician service at the scope RETA listed.

Recertification: three years, 24 PDHs

A CIRO certificate expires three years after it is issued. You may recertify by taking the current examination or by documenting 24 PDHs relevant to refrigeration operation, service, repair, maintenance, or engineering. One PDH = 50 minutes of instruction or participation. If a provider issues CEUs, 1 CEU = 10 PDHs. Log PDHs in the RETA Certification Database (RCD) during the active three-year cycle. RETA does not accept PDHs from candidates whose credential has already expired, and it does not accept PDHs dated outside that cycle. Expired credentials must retest. You may not request renewal more than six months before expiration.

OSHA HAZWOPER 29 CFR 1910.120(q) hours are not accepted toward CIRO recertification. Do not plan on a HAZWOPER refresher as your 24 PDHs. Accepted paths described in the handbook include RETA book final exams ($25 per attempt; 20 PDHs if you pass at 70% or higher), RAI-taught RETA coursework, chapter educational meetings with a certified roster, RETA Annual Conference workshops, college courses in refrigeration, manufacturer training documented per RETA procedures, first-time teaching (2 PDHs per lesson plan), papers (maximum 10 PDHs per paper per renewal), and RETA committee or chapter office service (2 PDHs each, maximum 8 PDHs per renewal).

Exam traps

• Trap: treating 135 as the scored count. Pilots do not count; 125 active items do.
• Trap: inventing a pass rate. Unpublished.
• Trap: assuming HAZWOPER or plant employment automatically renews CIRO. 24 PDHs in the RCD or a retake; expired means retest.
• Trap: skipping the VOE because the website checkout finished. The application is incomplete until the PDF arrives.