EPA Section 608 Certification Practice Test 2026: Practice test 2

1. Question 1 of 25

   When changing refrigerant oil, what is the highest pressure at which the system may be opened?

   • A100 psig
   • B25 psig
   • C5 psig
   • D50 psig
   Show answer

   Answer: C. 5 psig

   EPA says it is a violation to change oil at higher than 5 psig, so the system must be brought down to 5 psig or less first.

2. Question 2 of 25

   How many core questions does every Section 608 certification test include?

   • A100
   • B50
   • C25
   • D10
   Show answer

   Answer: C. 25

   Appendix D to Subpart F says each test includes 25 questions from the core group plus 25 from each technical group being taken.

3. Question 3 of 25

   How many questions are on a Universal test taken all at once?

   • A100
   • B75
   • C150
   • D50
   Show answer

   Answer: A. 100

   Appendix D says a Universal test has 25 core questions plus 75 technical questions, 25 from each of Type I, II and III, for 100 in total.

4. Question 4 of 25

   What is the passing score for closed-book Type I, II, III and Universal tests?

   • A60 percent
   • B70 percent
   • C90 percent
   • D50 percent
   Show answer

   Answer: B. 70 percent

   Appendix D sets the passing score for the closed-book Type I, Type II, Type III and Universal tests at 70 percent.

5. Question 5 of 25

   To earn Universal certification, what kind of core test must you pass?

   • ANo core test is needed
   • BA proctored core test
   • CA core test taken by mail
   • DAny open-book core test
   Show answer

   Answer: B. A proctored core test

   EPA says Universal certification requires a proctored core test, and core tests taken open-book cannot be used toward Universal.

6. Question 6 of 25

   Which appliance is a "small appliance" under Section 608?

   • AA factory-sealed unit with 5 pounds or less of refrigerant
   • BAny unit with 15 pounds or less of refrigerant, even if it is built on site
   • CA rooftop unit on a store
   • DA chiller in an office tower
   Show answer

   Answer: A. A factory-sealed unit with 5 pounds or less of refrigerant

   EPA defines a small appliance as fully manufactured, charged and hermetically sealed in a factory with five pounds or less of refrigerant.

7. Question 7 of 25

   Which is an example of a small appliance?

   • AAn ice rink system
   • BA household refrigerator
   • CA centrifugal chiller
   • DA supermarket rack system
   Show answer

   Answer: B. A household refrigerator

   EPA lists home refrigerators and freezers, room and window air conditioners and dehumidifiers as examples of small appliances.

8. Question 8 of 25

   Which certification do you need to service a window air conditioner?

   • ANo certification
   • BType I or Universal
   • CType III only
   • DSection 609 only
   Show answer

   Answer: B. Type I or Universal

   Type I certification covers servicing small appliances such as window units, and Universal certification covers all types of equipment.

9. Question 9 of 25

   Recovery equipment made after November 15, 1993 is used on a small appliance with a working compressor. How much refrigerant must be recovered?

   • A80 percent
   • B90 percent
   • C70 percent
   • D50 percent
   Show answer

   Answer: B. 90 percent

   With recovery equipment made after November 15, 1993, technicians must recover 90 percent of the charge when the compressor is operating.

10. Question 10 of 25

    Recovery equipment made after November 15, 1993 is used on a small appliance whose compressor does not run. How much must be recovered?

    • A100 percent
    • B60 percent
    • C90 percent
    • D80 percent
    Show answer

    Answer: D. 80 percent

    When the compressor is not operating, the rule requires recovery of 80 percent of the refrigerant with equipment made after November 15, 1993.

11. Question 11 of 25

    Recovery equipment made before November 15, 1993 is used on a small appliance. What is the required recovery level?

    • A50 percent of the refrigerant
    • B80 percent of the refrigerant
    • CAny amount
    • D95 percent of the refrigerant
    Show answer

    Answer: B. 80 percent of the refrigerant

    For small appliances, recovery equipment made before November 15, 1993 must recover 80 percent of the refrigerant.

12. Question 12 of 25

    Instead of a percentage, what other recovery level does the rule allow for small appliances?

    • AVent until the hiss stops
    • BPressurize to 10 psig
    • CEvacuate to 4 inches of mercury vacuum
    • DEvacuate to 25 mm Hg absolute
    Show answer

    Answer: C. Evacuate to 4 inches of mercury vacuum

    Section 82.156 lets technicians meet the small appliance requirement by evacuating the appliance to 4 inches of mercury vacuum.

13. Question 13 of 25

    What is the passing score for a Type I test given in mail-in format?

    • A100 percent
    • B84 percent
    • C75 percent
    • D70 percent
    Show answer

    Answer: B. 84 percent

    Appendix D sets a higher passing score of 84 percent for Type I tests that use the mail-in format.

14. Question 14 of 25

    Can a mail-in Type I test be used toward Universal certification?

    • AOnly if you score 100 percent
    • BOnly in some states
    • CYes, always
    • DNo
    Show answer

    Answer: D. No

    Appendix D states that mail-in format Type I tests cannot be used toward a Universal certification.

15. Question 15 of 25

    What is "system-dependent" recovery equipment?

    • AEquipment that only works on chillers
    • BEquipment that cleans refrigerant to AHRI 700
    • CEquipment that runs on batteries
    • DEquipment that needs the appliance's own components, such as its compressor, to remove the refrigerant
    Show answer

    Answer: D. Equipment that needs the appliance's own components, such as its compressor, to remove the refrigerant

    Section 82.152 defines system-dependent recovery equipment as equipment that needs help from components in the appliance to remove refrigerant.

16. Question 16 of 25

    Who is responsible for making sure refrigerant is recovered from a small appliance before it is scrapped?

    • AThe electric utility
    • BNo one
    • CThe final person in the disposal chain, such as a scrap recycler or landfill owner
    • DThe original manufacturer, which must run a take-back program for its old appliances
    Show answer

    Answer: C. The final person in the disposal chain, such as a scrap recycler or landfill owner

    EPA says the final person in the disposal chain, such as a scrap metal recycler or landfill owner, must ensure refrigerant was recovered before disposal.

17. Question 17 of 25

    A scrap yard accepts a fridge that no longer holds refrigerant. What should the signed statement include?

    • AA sticker saying it is empty
    • BThe price paid for the fridge
    • CThe name and address of the person who recovered the refrigerant and the date
    • DOnly the color of the fridge
    Show answer

    Answer: C. The name and address of the person who recovered the refrigerant and the date

    The signed statement must include the name and address of the person who recovered the refrigerant and the date it was recovered.

18. Question 18 of 25

    Why is it dangerous to expose refrigerant to an open flame or very hot surface?

    • AIt freezes instantly
    • BIt turns into pure oxygen
    • CIt becomes a harmless powder
    • DIt can break down into toxic products
    Show answer

    Answer: D. It can break down into toxic products

    EPA's Type I safety topics cover the decomposition products formed when refrigerants are exposed to high temperatures, which can be toxic to breathe.

19. Question 19 of 25

    Which certification covers servicing high-pressure and very high-pressure appliances, other than small appliances and MVACs?

    • AType III
    • BSection 609
    • CType I
    • DType II
    Show answer

    Answer: D. Type II

    EPA says Type II certification is for servicing or disposing of high- or very high-pressure appliances, except small appliances and MVACs.

20. Question 20 of 25

    Which refrigerant is listed as a high-pressure refrigerant?

    • AR-123
    • BR-113
    • CR-410A
    • DR-11
    Show answer

    Answer: C. R-410A

    Section 82.152 lists R-22, R-407A, R-407C, R-410A and R-502 as examples for high-pressure appliances.

21. Question 21 of 25

    Which refrigerant is used in very high-pressure appliances?

    • AR-23
    • BR-22
    • CR-123
    • DR-134a
    Show answer

    Answer: A. R-23

    The rule lists R-13, R-23, R-503, R-508A and R-508B as examples of refrigerants for very high-pressure appliances.

22. Question 22 of 25

    How does the rule define a high-pressure appliance?

    • AIt runs on 480 volts
    • BIts refrigerant boils above 85 degrees F
    • CIt holds more than 200 pounds of refrigerant
    • DIts refrigerant has a saturation pressure between 170 and 355 psia at 104 degrees F
    Show answer

    Answer: D. Its refrigerant has a saturation pressure between 170 and 355 psia at 104 degrees F

    Section 82.152 classes an appliance as high-pressure when its refrigerant's liquid phase saturation pressure is between 170 and 355 psia at 104 degrees F.

23. Question 23 of 25

    A medium-pressure appliance using R-134a is not a small appliance. Which certification covers it?

    • AType III
    • BType II
    • CNone
    • DType I
    Show answer

    Answer: B. Type II

    Section 82.161 says people who work on medium-, high- or very high-pressure appliances must be Type II (or Universal) technicians, and R-134a is a medium-pressure refrigerant.

24. Question 24 of 25

    What evacuation level is required before opening a high-pressure appliance with less than 200 pounds of refrigerant?

    • A0 inches of Hg vacuum
    • B15 inches of Hg vacuum
    • C10 inches of Hg vacuum
    • D25 mm Hg absolute
    Show answer

    Answer: A. 0 inches of Hg vacuum

    Table 1 of section 82.156 requires 0 inches of Hg vacuum for high-pressure appliances under 200 pounds, with any recovery equipment age.

25. Question 25 of 25

    Recovery equipment made after November 15, 1993 is used on a high-pressure appliance with 200 pounds or more. What level is required?

    • A0 inches of Hg vacuum
    • B4 inches of Hg vacuum
    • C29 inches of Hg vacuum
    • D10 inches of Hg vacuum
    Show answer

    Answer: D. 10 inches of Hg vacuum

    Table 1 sets 10 inches of Hg vacuum for high-pressure appliances of 200 pounds or more when the recovery equipment was made on or after November 15, 1993.

Keyboard: 1–4 to answer, Enter for the next question.

The real test: 70 percent on closed-book tests; 84 percent on mail-in Type I tests