RETA Breeze Jul-Aug 2022

RETA’s CO2 Handbook was added to CRST references starting with new CRST exams that were launched in August 2022. CARO, CIRO and CRST Study Guides can be downloaded free from the certification section of the RETA website. Each RETA Study Guide includes: • A list of RETA reference books that support questions in that examination. • Formulas, tables, figures and other information that can help candidates answer questions during each test, including an Ammonia Safety Data Sheet (SDS). These also appear onscreen next to questions during each examination.

candidates know when to refer to these references instead of trying to memorize details in the SDS. RETA recommends that candidates should become as familiar with these references as they are with manuals that support equipment in the refrigeration facilities where they work. CARO, CIRO and CRST Practice Tests can help candidates prepare for full RETA tests. One attempt on their practice test is included in each candidate’s application fee. Candidates can purchase additional attempts on these practice tests for $59 each. Each practice test has a time limit of 90 minutes and is about half as long as the full CARO, CIRO or CRST exam. Three hours are allowed for each full exam. Practice tests include questions from each of the content areas that are part of the full exam. RETA’s Certification Committee (CertComm) has validated each question to meet the same criteria as those in the full exams. Practice test questions cover the topics in full CARO, CIRO or CRST exams but practice questions do not appear in the full exams.

CIRO Scores 1

CIRO Scores 1

Scored CIRO Questions by Content Area

63% 61% 78% 63% 73% 73% 61% 77% 69%

85% 75% 74% 84% 80% 68% 84% 77% 81%

1. Safety Standards & Practices

2. Electricity 3. Heat Flow

4. Monitoring System Performance 5. Valves, Controls & DX Systems 6. Liquid Overfeed & Flooded Systems 7. Two-Stage & Secondary Coolant Systems

8. Evaporator Defrost

Total Score

• Instructions for how to increase the size of the onscreen references to improve clarity and how to navigate in the split screen next to questions on each test. CIRO and CRST Study Guides also include screens that show normal and abnormal operating conditions in refrigeration systems. Questions on each test ask candidates to evaluate what is going on at different points in a system, identify risks that could lead to problems, and recom- mend steps to troubleshoot and resolve hazards that could occur based on what they see in each system.

Each Study Guide also offers guidance about how to use references to help prepare for full RETA exams. The same references also appear next to questions for each practice test, which can help candidates learn when and how to use these references. Candidates must decide when to refer to CARO, CIRO or CRST reference during each exam. For example, answers to some safety questions in each test are provided in the SDS. RETA prefers that

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