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    EPA 608 Core · free practice

    EPA 608 Core Practice Questions — Free Refrigerant Certification Prep

    The Core section is required for every EPA 608 technician — Type I, II, or III all start here. These free Core practice questions cover the Clean Air Act prohibitions, recovery requirements, leak rates and repair triggers, refrigerant management under the AIM Act, safe handling, and recordkeeping. Every item is paraphrased from 40 CFR Part 82 Subpart F with the relevant section cited in the answer key.

    Practice Core questions free

    Sample questions

    1. Under Section 608 of the Clean Air Act, intentional venting of refrigerants during the maintenance, service, or repair of refrigeration and air-conditioning equipment is:

    1. A. Permitted if performed by certified technicians
    2. B. Permitted for small appliances only
    3. C. Prohibited, with limited de minimis releases that are not avoidable
    4. D. Permitted if reported to the EPA within 30 days
    Show explanation

    Section 608 prohibits knowingly venting Class I and II refrigerants and their substitutes during service. Only "de minimis" releases not avoidable during good-faith recovery are permitted.

    Ref: 40 CFR Part 82, Subpart F

    2. The Montreal Protocol is the international treaty that addresses substances that:

    1. A. Increase the greenhouse effect
    2. B. Deplete the stratospheric ozone layer
    3. C. Cause acid rain
    4. D. Contribute to ground-level smog
    Show explanation

    The Montreal Protocol (1987) phases out ozone-depleting substances such as CFCs and HCFCs. Climate-warming HFCs are addressed by the Kigali Amendment (2016) and, in the U.S., by the AIM Act of 2020.

    3. CFCs (chlorofluorocarbons) deplete stratospheric ozone primarily because of:

    1. A. Their fluorine content
    2. B. Their high boiling points
    3. C. The release of chlorine atoms in the stratosphere
    4. D. Their water solubility
    Show explanation

    CFCs are stable in the troposphere and migrate to the stratosphere, where UV radiation cleaves the C–Cl bond. The freed chlorine atoms catalytically destroy ozone, with a single Cl atom destroying thousands of O₃ molecules before being removed.

    Practice Core questions free

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    Frequently asked

    Do I need Core to certify in Type I, II, or III?

    Yes. Core is required for every type. You must pass Core plus at least one Type to earn certification.

    What does the EPA 608 Core section cover?

    Clean Air Act / Section 608 framework, ozone-depletion basics, refrigerant management under the AIM Act, recovery requirements, leak repair triggers, safe handling, and recordkeeping.

    How many questions are on the real Core test?

    25 questions, open-book in many cases, with a 70% pass threshold.