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CRES practice questions - frequently asked questions

Plain answers about how CRES Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real CRES exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The CRES exam spans 5 domains: Refrigeration system concepts, components, and functions in safe operations, including performance, measurement, Process Safety Management (PSM) and Risk Management (RM); Energy Efficiency Basics: Concepts, calculations, conversions, efficiency opportunities, measuring and tracking energy use, energy mapping; Refrigeration Best Practices: Instrumentation, calibration, controls, design, and sizing characteristics, defrost cycles, refrigeration loads; Managing non-refrigeration system energy use such as lighting, compressed air and pumps; Facility Energy Management: Set and monitor key performance Indicators, measurement to improve energy efficiency, creating incentives and opportunities to improve energy efficiency. Every practice question on this site is tagged to one of these domains.

The CRES exam has 135 questions and is completed in 3 hours. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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