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CFC practice questions - frequently asked questions

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

The CFC exam spans 8 domains: Drainage (20% of the exam); Water Distribution (20% of the exam); Natural Gas Piping (15% of the exam); Medical Gas Piping (20% of the exam); Industrial Piping (10% of the exam); Swimming Pools, Wells and Irrigation (5% of the exam); Solar (5% of the exam); Fire Protection (5% of the exam). Every practice question on this site is tagged to one of these domains.

The domains are not weighted equally on the exam. By share of the marks: Drainage 20%; Water Distribution 20%; Medical Gas Piping 20%; Natural Gas Piping 15%; Industrial Piping 10%; Swimming Pools, Wells and Irrigation 5%; Solar 5%; Fire Protection 5%.

The CFC exam has 110 questions and is completed in 9 hours. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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