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CPDT practice questions - frequently asked questions

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

The CPDT exam spans 10 domains: Set up small projects or a portion of large projects (12% of the exam); Collect utility data prior to layout (7% of the exam); Research codes, ordinances, and building certifications (4% of the exam); Lay out general systems (16% of the exam); Coordinate with other disciplines (16% of the exam); Perform sizing calculations (16% of the exam); Select equipment (12% of the exam); Prepare documentation for submission (5% of the exam); Support construction administration (7% of the exam); Prepare project closeout documentation (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: Lay out general systems 16%; Coordinate with other disciplines 16%; Perform sizing calculations 16%; Set up small projects or a portion of large projects 12%; Select equipment 12%; Collect utility data prior to layout 7%; Support construction administration 7%; Prepare documentation for submission 5%; Prepare project closeout documentation 5%; Research codes, ordinances, and building certifications 4%.

The CPDT exam has 100 questions and is completed in 3 hours 30 minutes. Our timed practice mirrors that length and pacing, so exam day feels familiar.

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