1,700+ questions with explanations. Practice your weak spots and prepare for all four exam sections.
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From your first practice question to your next mock exam.
Understand why an answer is right. Read through every answer in Cram, or test yourself with instant feedback in Study.
Smart Practice and Most Missed bring tricky questions back into focus, so you spend more time on what needs work.
Take 25-question mock exams, timed like the real one or untimed. Skip and flag questions to come back to, then review what is left before you submit. Pass two in a row and the section shows Ready to pass.
Study offline in English or Spanish, on your phone or tablet. Practice your weakest topics, bookmark tricky questions, back up your progress, and set reminders to keep your practice on track.
Decades of learning research point to a few habits that make information stick. The app is built around them.
Pulling an answer from memory strengthens it far more than reading it again. Study, Smart Practice and mock exams all have you answer first, then show you whether you were right.
Reviews spread over days beat cramming the night before. Smart Practice brings each question back as you’re about to forget it, and sooner when you miss it.
Feedback that explains an answer fixes mistakes and gives the fact something to hold on to. Every one of the 1,786 questions has an explanation.
Questions from different topics, mixed together, teach you to tell similar rules apart, the way the exam asks them. Smart Practice and mock exams shuffle questions from across the section.
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Comprehensive question banks for every certification level
Ozone depletion, the Clean Air Act, refrigerant safety, and proper handling procedures. Required for any Type certification.
Small appliances with 5 lbs or less of refrigerant: window units, refrigerators, and vending machines.
High-pressure appliances: residential A/C, heat pumps, and commercial refrigeration systems.
Low-pressure appliances: chillers used in large commercial and industrial HVAC systems.
Real reviews from people who passed their exam
"This app is amazing! I used it, and only missed one question on my 608 test. If you're taking the EPA 608 test and you want to ace it, this is what you need."
"After looking at a few books and debating over taking a class, I found this app. I spent 2 days just using this app and now I just finished the test. Simply amazing."
"Using this app with the book, my scores went from way low to passing with 90-100% each time. I feel very confident I'll be holding my universal HVAC license soon."
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