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CRD practice questions - frequently asked questions

Plain answers about how CRD 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 CRD exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The CRD exam spans 9 domains: Ground Source Heat Pump Benefits; System Components; Heat Pump Types; Design Process; Energy Requirements; Load Calculations; Parameters that affect different types of heat pump performance, site, geology and soil conditions; Heat pump and pipe design; Economics of design. Every practice question on this site is tagged to one of these domains.

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