Nevada C-21 Refrigeration and Air Conditioning Contractor Exam Prep

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Your access starts when you do: the days begin the first time you open the course, not at checkout (or 14 days after purchase, whichever comes first).

Business & Law is 75% off with this classification. Add it only if you want it, for the same term: $24.75 for 30 days, $32.25 for 60 days, $42.25 for 90 days.

Official sitting

Nevada C-21 Refrigeration and Air Conditioning Contractor exam at a glance

The Nevada C-21 Refrigeration and Air Conditioning Contractor exam has 85 questions and a time limit of 3 hours. That works out to about 2.1 minutes per question. This Nevada license also requires the state’s separate Business & Law exam. Figures are from the official candidate bulletin.

Questions85
Time3 hours

Confirm question count, time, open-book rules, and passing score on the live board bulletin before you sit. We do not guarantee a passing result. Source: PSI NV C-classification CIB updated 3/25/2026, C-21 block; bulletin 331. How we source exam facts

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What’s included

64,000+ word study guide

Worked calculations, code-section breakdowns, exam traps, a key-terms glossary and a 30/60/90-day plan.

4 full-length practice exams

Original questions weighted to match the topic mix of the real exam.

340 practice questions

Every one with a written explanation and the code section behind the answer.

Same study guide and four exams on every term. You are choosing how long you can log in.

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What this prep covers

  1. Start Here — Your Nevada C-21 Exam and How to Use This Course
  2. Load Calculations, Ducts, and Testing, Adjusting and Balancing — 15 of 85 Items
  3. Controls, A/C and Heat Pump Equipment, and Evaporative Cooling — 11 of 85 Items
  4. Furnaces and Heaters, Chimneys, Flues and Vents, and Combustion Air — 11 of 85 Items
  5. Fuel Systems — 10 of 85 Items
  6. Hydronics, Chillers, and Solar — 9 of 85 Items
  7. Ventilation and Exhausts, and Safety — 7 of 85 Items

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Common questions about this exam

How many questions are on the Nevada C-21 Refrigeration and Air Conditioning Contractor exam?

The Nevada C-21 Refrigeration and Air Conditioning Contractor exam has 85 questions and a time limit of 3 hours, about 2.1 minutes per question. Check the current board bulletin before you book.

Do I also need the Business & Law exam in Nevada?

Yes. This Nevada license also requires the state’s separate Business & Law exam. That exam has 60 questions, 2 hours. Nevada Business and Law (CMS) prep is 75% off when you add it to this classification for the same term.

How much practice does this prep include?

It includes 4 full-length practice exams and 340 practice questions in total. Every question has a written explanation naming the code section the answer comes from.

How long is the study guide?

The Nevada C-21 Refrigeration and Air Conditioning Contractor guide runs to roughly 64,266 words in 7 sections, starting with “Start Here — Your Nevada C-21 Exam and How to Use This Course” and ending with “Ventilation and Exhausts, and Safety — 7 of 85 Items”.

How long do I get access?

Choose 30, 60 or 90 days at checkout. Your days do not start at checkout: they begin the first time you open the course (or 14 days after purchase, whichever comes first). Access works on any device, and you can retake every practice exam as often as you like. Days remaining are shown in your dashboard and you can extend at any time.

Is this an official Nevada C-21 Refrigeration and Air Conditioning Contractor exam?

No. This is independent preparation material. It is not affiliated with or endorsed by any state licensing board or exam vendor, and it does not contain real exam questions. Always confirm current requirements with your licensing board.

About this prep

This prep is built specifically for the Nevada C-21 Refrigeration and Air Conditioning Contractor examination and includes a 64,000+-word study guide written for this exam, 4 full-length practice exams and 340 practice questions, each with a written explanation.

How access works

You are paying for access length (30, 60, or 90 days). The study guide and four timed exams are the same on every term. Your days start the first time you open the course, not at checkout (or 14 days after purchase, whichever comes first), and access works on any device for that term.

Not affiliated with or endorsed by any state licensing board or exam vendor. For exam-preparation purposes only.