Free EPA 608 Universal practice test — all four sections (Core, Type I, II, III), 100 questions, 25 per section. Instant scoring, explanations, no signup. Pass mark: 72% (18 of 25) per section.
Free EPA 608 Universal practice questions
1. Refrigerant blends need to be charged as a liquid. (True or false)
Correct answer: True
2. Refrigerant blends take on the ASHRAE number of the main refrigerant in the blend. (True or false)
Correct answer: False
3. Technicians can make their own EPA-approved refrigerant blends. (True or false)
Correct answer: False
4. Which of the following do HFOs contain? (Select all that apply)
Correct answer: Fluorine, Carbon
The H in HFO stands for hydrogen. The F stands for Fluorine. The last element of HFOs is carbon, just like HFCs. The O does not tell you the name of an element in HFOs.
5. If a refrigerant has an ODP of 0.055, which of the following are true? (Select all that apply)
Correct answer: It contains chlorine, It could be R-22
If a refrigerant has an ODP of anything greater than 0, it must contain chlorine, since it is chlorine that is responsible for destroying ozone. Examples of this include R-11, which has an ODP of 1, and R-22, which has an ODP of 0.055. They both contain chlorine.
6. The GWP of R-290 is greater than which of the following? (Select all that apply)
Correct answer: None of these
R-290 is greater than none of these refrigerants. Recall that R-290 is propane, which is a hydrocarbon. We mentioned that hydrocarbons, or HCs, have the lowest GWPs. Answer choices a, b, and c are either HCFC or HFC refrigerants, which have GWPs in the thousands.
7. R-11 is the same as
Correct answer: CFC-11
R-11 is a CFC. So it is the same as CFC-11.
8. R-12 has a GWP in which of the following ranges?
Correct answer: 10,000-50,000
R-12 has a GWP of 10,900. This means it has close to 11,000 more global warming potential than carbon dioxide.10,900 would fall between 10,000 and 50,000.
9. R-12 is the same as
Correct answer: CFC-12
R-12 is a CFC. So it is the same as CFC-12.
10. R-1234yf is the same as:
Correct answer: HFO-1234yf
R-1234yf is an HFO. So it is the same as HFO-1234yf.
11. R-134a is the same as
Correct answer: HFC-134a
R-134a is an HFC. So it is the same as HFC-134a.
12. R-410a has a GWP in which of the following ranges?
Correct answer: 1,000-10,000
R-410a has a GWP of 2088, which means it has 2088 times more global warming potential than carbon dioxide. 2088 falls in between 1000 and 10,000.
13. R-410a is the same as
Correct answer: HFC-410a
R-410a is an HFC. So it is the same as HFC-410a.
14. R-134a is the same as:
Correct answer: HFC-134a
R-134a is an HFC. So it is the same as HFC-134a.
15. What is the main safety concern with R-410a?
Correct answer: Asphyxia
Even though R-410a is non toxic and has low flammability, it can still cause asphyxia. This is the main concern when it comes to handling R-410a.
16. What does the new subclass (2L) describe?
Correct answer: Refrigerants that are Class 2 and burn slowly
The new subclass of refrigerants, called class 2L, are Class 2 refrigerants that burn slowly. Since they are still class 2, they still have low flammability.
17. What is highest possible ODP for any CFC, HCFC, HFC, or HFO refrigerant?
Correct answer: 1
The highest possible ODP for these refrigerants is 1 for R-11, a CFC refrigerant. The potential of any refrigerant to deplete the ozone layer is compared to the ODP of R-11 and will be lower.
18. What is the least possible ODP for a refrigerant?
Correct answer: 0
The highest ODP is 1 for R-11, a CFC. If a refrigerant does not contain chlorine and does not destroy ozone, it has an ozone depletion potential (ODP) of 0.
19. What is the ODP of R-441a?
Correct answer: 0
R-441a is a hydrocarbon refrigerant. Hydrocarbons are natural refrigerants and do not contain chlorine, they do not deplete the ozone layer. So all hydrocarbons have an ODP of 0.
20. What is the ODP of R-600a?
Correct answer: 0
R-600a is isobutane, which is a natural refrigerant. Since natural refrigerants do not contain chlorine, they do not deplete the ozone layer. So their ODP is 0.
21. Which of the following classes refers to a refrigerant that has low flammability?
Correct answer: Class 2
The three classes for flammability are 1, 2, and 3. Class 2 is assigned to refrigerants with low flammability.
22. Which of the following classes refers to a refrigerant that is not flammable at all?
Correct answer: Class 1
Class 1 is assigned to non-flammable refrigerants.
23. Which of the following classes refers to a refrigerant with high toxicity?
Correct answer: Class B
Refrigerants are separated into two classes of toxicity. Class A is low toxicity, while Class B is high toxicity. So the correct answer is B for high toxicity.
24. Which of the following classes refers to a refrigerant with low toxicity?
Correct answer: Class A
Class B is high toxicity as we said for the previous question, so class A is low toxicity.
25. Which gas is used as a reference for measuring GWP?
Correct answer: Carbon dioxide
Carbon dioxide is used as a reference in measuring global warming potential (GWP).
26. Low loss fittings are required for servicing appliances containing CFCs, HCFCs, and HFCs because of the Venting Prohibition. (True or false)
Correct answer: True
This statement is true. Low-loss fittings prevent us from accidentally releasing ODS and their substitutes into the atmosphere. They are required because of the Venting Prohibition, which makes it illegal to release harmful refrigerants into the air.
27. System dependent recovery captures refrigerant in a pressurized container to keep it fresh. (True or false)
Correct answer: False
This statement is false. With system dependent recovery, we use a non-pressurized container to capture the refrigerant.
28. We generally want to leak test access fittings after refrigerant recovery to make sure it does not have leaks for the next service. This is to save us time from leak testing the access fitting the next time around. (True or false)
Correct answer: False
This statement is false. We need to leak test access fittings before starting the process of refrigerant recovery, not after completing one.
29. Why should a solderless piercing valve not remain on the system after repair? (Select all that apply)
Correct answer: It tends to leak over time, It is not intended to stay on the system permanently
The source says solderless piercing valves tend to leak over time and should not remain on refrigeration systems after the repair is complete.
30. When using passive recovery and the compressor does not run, which sides of the system must be accessed? (Select all that apply)
Correct answer: High side, Low side
The source says both the high and low side must be accessed when using passive recovery and the compressor does not run.
31. Where are permanent hydrocarbon safety markings required on household appliances charged with HC refrigerants? (Select all that apply)
Correct answer: On or near evaporators, On exposed refrigerant tubing, In the machine compartment, On the exterior of the refrigerator
The source lists all four of these locations for permanent safety markings on household appliances charged with hydrocarbon refrigerants.
32. Which of the following are areas that do not need to be marked when it comes to appliances that contain HCs?
Correct answer: Inside refrigerator door
Permanent markings are needed in all of these areas except for inside the refrigerator door. The purpose of these markings is to help the technician identify risk areas.
33. Which of the following is needed to protect your hands from refrigerant burns?
Correct answer: Butyl-lined gloves
Only butyl-lined gloves can protect your hands from refrigerant burns.
34. If the oil is contaminated, what do we have to do?
Correct answer: Flush the system
If the oil is contaminated, we need to flush the entire system. Even though the burnout occurred in the compressor, the contaminated oil could be present in other components.
35. Non-condensables would ____ the pressure on the high side of an active recovery device.
Correct answer: Increase
If non-condensables are present, the pressure on the high side of an active recovery device would increase.
36. Recovery devices are tested and certified by:
Correct answer: Both AHRI and UL
AHRI and UL are the only two organizations approved by the EPA to certify recovery machines. The EPA may approve the organizations that certify these recovery machines, but it does not test and certify them itself.
37. The refrigerant vented off the top of charging cylinders needs to be recovered if it is:
Correct answer: All of these
All refrigerants subject to the Venting Prohibition need to be recovered when vented off the top of charging cylinders.
38. Vacuum pumps can be used to:
Correct answer: Remove air and other non-condensables
Vacuum pumps are used to remove air and other non-condensable after all refrigerant has been recovered from a system. They cannot be used to recover refrigerant.
39. What are the signs of refrigerant contamination?
Correct answer: Both (a) and (b)
Discolored oil and an acidic smell are both signs of contamination.
40. What does the process stub look like in small appliances?
Correct answer: A straight piece of tubing
The process stub on small appliances looks like a straight piece of tubing.
41. What piece of equipment should we check regularly for leaks?
Correct answer: Recovery device
We need to check recovery devices regularly for leaks because they have the highest probability of venting refrigerant. It is not necessary to check vacuum pumps for leaks because they only vent non-condensable into the atmosphere. Access fittings need to be leak tested before use, not as part of a regular maintenance routine.
42. When the system pressure is found to be 0 psig, what does this indicate?
Correct answer: All of these
If the systemʼs pressure is 0 psig, then all of these statements are true.
43. Which of the following indicates a compressor burnout in a sealed system?
Correct answer: A pungent smell
A pungent smell usually indicates a compressor burnout.
44. Which of the following statements is true for small appliances?
Correct answer: The EPA does not require repair of leaking small appliances
The EPA does not require technicians to repair leaks on small appliances.
45. Which of the following would remove non-condensables from a system?
Correct answer: Both (a) and (b)
Using filter driers and flushing the system would remove non-condensables from a system.
46. Which technician certification level may service small appliances under Section 608, aside from Universal certification?
Correct answer: Type I
The Type I certification covers the maintenance, service, and repair of small appliances. Universal certification also covers that work.
47. Which systems are specifically excluded from Type I appliance certification criteria no matter the refrigerant or charge?
Correct answer: MVAC-like systems
The source states that MVAC-like systems do not meet the criteria for Type I appliance certification regardless of refrigerant type or quantity.
48. What does the source say about drop-in substitutes when converting an R-22 system?
Correct answer: EPA does not approve any substitute as a direct drop-in replacement
The source says EPA does not approve any substitute refrigerant as a direct drop-in replacement to service an R-22 or other system.
49. How much HCFC or HFC charge may be handled with passive recovery equipment on a Type I appliance?
Correct answer: 15 pounds
The source says passive recovery equipment used on an appliance containing HCFCs or HFCs is limited to a maximum charge of 15 pounds.
50. What may a vacuum pump made for system dehydration be used to evacuate before that cylinder is used for recovery?
Correct answer: A recovery cylinder
The source says a dehydration vacuum pump may be used to evacuate a recovery cylinder that will be used as a recovery device.
51. Before transferring refrigerant into an empty cylinder, the cylinder should be evacuated. (True or false)
Correct answer: True
The source says the empty cylinder should be evacuated to reduce pressure and remove non-condensables before transfer.
52. A hermetic recovery machine may overheat when drawing deep vacuums because very little refrigerant is flowing through its compressor for cooling. (True or false)
Correct answer: True
The source warns that hermetic compressor motors on recovery machines may overheat when drawing deep vacuums because they rely on refrigerant flow for cooling.
53. Anytime a system is opened for service, the liquid-line filter drier should be replaced. (True or false)
Correct answer: True
The source explicitly states that anytime a system is opened for service, the liquid-line filter drier should be replaced.
54. According to the source, which actions can speed up the refrigerant recovery process? (Select all that apply)
Correct answer: Cool the recovery cylinder, Heat the system, Recover refrigerant in the liquid phase
Cooling the recovery cylinder lowers its pressure, heating the system increases the pressure differential, and recovering in the liquid phase reduces recovery time. Longer hoses are not listed as a way to speed recovery.
55. Refrigerant has been recovered during the replacement of the evaporator coil in an appliance. After the repairs, the refrigerant:
Correct answer: can be filled back into the system
Any recovered refrigerant can be charged back into the system once the repairs are done.
56. The risk of water in the appliance freezing while charging an R-410A appliance will remain until the system achieves a pressure ofapproximately:PT Chart
Correct answer: 110 psig
The refrigerant R410A can boil at 0°Celsius when the pressure is less than 110 psig. Once the pressure reaches 110 psig, there is no riskthat the water in the appliance will freeze.
57. Water present in the system can freeze if:
Correct answer: A large vacuum pump is used for evacuation
The system's pressure (and temperature) can reduce very quickly while evacuating with a large vacuum pump. This sudden decrease intemperature can cause the water in the system to freeze and form ice.
58. What is the standing pressure of R-410A at 80°F?PT Chart
Correct answer: 235 psig
About 235 psig at 80°F.
59. At 0 psig pressure, what is the approximate evaporation temperature of R-134a?PT Chart
Correct answer: -15°Fahrenheit
On the R-134a P-T chart, 0 psig corresponds to a saturation temperature of approximately -15°F.
60. During the evacuation of a moisture-laden chiller, the vacuum stalls, and frost begins to form in the piping. What action should thetechnician take to restore flow without adding refrigerant?
Correct answer: Break the vacuum with a brief nitrogen sweep, then resume evacuation
Introducing nitrogen raises pressure and temperature, preventing freezing of the moisture inside the system.After the brief nitrogen sweep, resume evacuation to remove both the nitrogen and the moisture.
61. Which units are used to measure a deep vacuum?
Correct answer: Microns
The pressure in a deep vacuum is measured in units called microns.
62. A "major repair" under EPA's regulations would be:
Correct answer: Replacing a condenser coil
EPA defines major repairs as maintenance, service, or repair that involves the removal of the appliance's condenser, evaporator auxiliaryheat exchanger coil, or compressor. By this definition, replacing a condenser coil is a “major repair.”
63. An equipment room has an appliance that uses R717. Under ASHRAE Standard 15, which piece of equipment is not compulsory in theroom?
Correct answer: Refrigerant Detector
For an equipment room with R717 (ammonia) in its systems, a refrigerant detector is not needed.
64. Oil foaming in a system can be detected in the:
Correct answer: Compressor
Most refrigerant oil can be found in the compressor of an appliance, so oil foaming is also commonly seen in the compressor.
65. A piping sketch shows two pressure relief valves installed one after the other on the same discharge line. What is the correct action?
Correct answer: Reject the design; relief valves must not be in series
Pressure relief valves should never be installed in series to the system lines. It doesn't add protection and cancause improper discharge.
66. The purpose of isopropyl alcohol is:
Correct answer: To clean ice and dirt off the sight glass
Ice can form on the sight glass at low temperatures, so it should be cleaned using an isopropyl alcohol spray.
67. We would take an ____ if a unit has a compressor burnout, and it is considered a ____.
Correct answer: Oil sample; major repair
A compressor burnout is a major repair, and an oil sample is taken to detect it. A sample of the oil is taken to check its properties.
68. When the ____ is closed, the reciprocating compressor might get damaged if it is energized.
Correct answer: Discharge service valve
When the discharge service valve is closed, the reciprocating compressor might get damaged if it is energized.
69. After opening a system to repair a small leak, a technician pulls a deep vacuum and prepares to recharge. Which component must bereplaced before charging?
Correct answer: Filter drier
Opening the system introduces air, moisture, and other contaminants that evacuation alone won't remove fromthe filter drier. The filter drier is a closed component meant to trap air and moisture. So it is best to replace it whenever the system isopened for repairs.
70. If an appliance has dual use, how is the applicable leak-rate category determined?
Correct answer: By the higher percentage of use
When an appliance has dual use, the applicable maximum leak rate is determined by the highest percentage of use.
71. What is the comfort cooling leak-rate threshold as of January 1, 2019?
Correct answer: 10% of the charge per year
As of January 1, 2019, the maximum leak rate for comfort cooling is 10% of the charge per year.
72. What is the commercial refrigeration leak-rate threshold as of January 1, 2019?
Correct answer: 20% of the charge per year
As of January 1, 2019, the maximum leak rate for commercial refrigeration is 20% of the charge per year.
73. What is the industrial process refrigeration leak-rate threshold as of January 1, 2019?
Correct answer: 30% of the charge per year
As of January 1, 2019, the maximum leak rate for industrial process refrigeration is 30% of the charge per year.
74. How long does the owner or operator normally have to repair a leaking appliance with 50 or more pounds of regulated refrigerant and conduct the initial verification test?
Correct answer: 30 days
The owner or operator has 30 days to repair the appliance so that it leaks below the threshold limit and conduct the initial verification test, unless EPA grants additional time.
75. If the replacement appliance will use a refrigerant exempt from the venting prohibition, how long does the owner or operator have to retrofit or retire the leaking appliance?
Correct answer: 18 months
The source says the owner or operator has 18 months to retrofit or retire a leaking appliance if the replacement appliance will use a refrigerant exempt from the venting prohibition.
76. The leak rate of an appliance using a regulated refrigerant must be calculated when topping off or recharging the system due to a loss of charge. (True or false)
Correct answer: True
The source states that the leak rate must be calculated when topping off or recharging a system due to a loss of charge.
77. System mothballing requires removing the appliance and storing it in a warehouse at the facility. (True or false)
Correct answer: False
The source specifically says system mothballing does not require removing the appliance and storing it in a warehouse at the facility.
78. Raising the temperature of the system or the room where a low-pressure chiller is located will result in faster refrigerant recovery. (True or false)
Correct answer: True
The source says raising the temperature of the system or the room will result in faster refrigerant recovery.
79. What personal protective equipment does the source say should be worn when working with liquid refrigerant for low-pressure systems? (Select all that apply)
Correct answer: Gloves, Safety goggles
The source says gloves and safety goggles should be worn when working with liquid refrigerant for low-pressure systems.
80. On a low-pressure chiller, where does the purge unit get its suction?
Correct answer: From a connection on top of the condenser
The purge unit gets its suction from a connection on top of the condenser where most non-condensables accumulate.
81. What test kit is used to determine whether a chiller tube is leaking?
Correct answer: Hydrostatic tube test kit
A hydrostatic tube test kit is used to determine if a tube is leaking.
82. When leak testing a low-pressure centrifugal chiller with nitrogen, what is the maximum test pressure?
Correct answer: 10 psig
When leak testing a low-pressure centrifugal chiller with nitrogen, the maximum test pressure is 10 psig.
83. What can happen if nitrogen pressure exceeds 10 psig during leak testing of a low-pressure refrigeration system?
Correct answer: The rupture disc may fail
Leak testing a low-pressure refrigeration system with nitrogen in excess of 10 psig could cause the rupture disc to fail.
84. To reduce air accumulation into an idled low-pressure refrigeration system, system pressure should be maintained:
To prevent air accumulation into an idled low-pressure refrigeration system, maintain system pressure slightly above atmospheric pressure.
85. Moisture most frequently enters low-pressure chillers through leaks from which areas?
Correct answer: Gaskets or fittings
The source says moisture most frequently enters the refrigerant system in low-pressure chillers through leaks from areas with gaskets or fittings.
86. To check for a refrigerant leak to the water side of a chiller, where should the detector probe be placed after the water is removed?
Correct answer: In the drain valve opening of the water box
To check for a refrigerant leak to the water side of a chiller, place a leak detector probe in the drain valve opening of the water box with the water removed.
87. According to ASHRAE Guideline 3, during a standard vacuum test the system should be checked for leaks if pressure rises from 1 mm Hg to above:
Correct answer: 2.5 mm Hg
According to ASHRAE Guideline 3, the system should be checked for leaks if, during a standard vacuum test, the pressure rises from 1 mm Hg to a level above 2.5 mm Hg.
88. For leak-rate calculations on a chiller, which charge should be used according to the source?
Correct answer: The charge stated on the equipment nameplate
Use the charge stated on the equipment nameplate to determine a chiller's normal charge for leak rate calculations.
89. If a leaking appliance with 50 or more pounds will be replaced by one using a refrigerant exempt from the venting prohibition, how long does the owner have to retrofit or retire it?
Correct answer: 18 months
The source gives the owner or operator 18 months to retrofit or retire the appliance if the replacement appliance will use a refrigerant exempt from the venting prohibition.
90. On a recovery unit used with a low-pressure chiller, the high-pressure cut-out control is typically set for:
Correct answer: 10 psig
The high-pressure cut-out control on a recovery unit used for evacuating or recovering refrigerant from a low-pressure chiller is typically set for 10 psig.
91. On an average 350-ton R-123 chiller at 0 psig, approximately how much refrigerant remains in the vapor state after all liquid has been removed?
Correct answer: 100 pounds
The source says that after all the liquid has been removed, an average 350-ton R-123 chiller at 0 psig would still have approximately 100 pounds of refrigerant in the vapor state.
92. What type of recovery unit allows faster recovery of large quantities of refrigerant on low-pressure systems?
Correct answer: Water-cooled recovery unit
A water-cooled recovery unit will allow for faster recovery of large quantities of refrigerant.
93. To reduce the amount of refrigerant contained in the oil before oil removal, the oil should be heated to about:
Correct answer: 130 F
When removing refrigerant oil, it should be heated to 130 F because less refrigerant will be contained in the oil at the higher temperature.
94. At what pressure does the rupture disc on a recovery vessel for low-pressure refrigerants relieve?
Correct answer: 15 psig
The source says the rupture disc on a recovery vessel for low-pressure refrigerants relieves at 15 psig.
95. Before disposing of a low-pressure appliance, refrigerant must be recovered or evacuated to:
Correct answer: 25 mm of Hg absolute
Before disposing of a low-pressure appliance, the refrigerant must be recovered or evacuated to 25 mm of Hg absolute.
96. Before evacuation, recovery, or dehydration, what sample should be taken if the unit has had a compressor burn-out?
Correct answer: Oil sample
Before evacuation, recovery, or dehydration, an oil sample should be taken if the unit has had a compressor burn-out.
97. What procedure does the source recommend when dehydrating a system that contains a large amount of moisture?
Correct answer: Triple evacuate using dry nitrogen to break the vacuum
The source says to triple evacuate or dehydrate the system using dry nitrogen to break the vacuum when the system contains a large amount of moisture.
98. Before adding liquid refrigerant to an evacuated water-cooled chiller system using R-123, the vapor pressure should be above:
Correct answer: 20 inches Hg vacuum
The source says an evacuated water-cooled chiller system with R-123 should have a vapor pressure above 20 inches Hg vacuum before adding liquid refrigerant.
99. Which valve is used to charge liquid refrigerant into a low-pressure appliance because it is the lowest access point?
Correct answer: Evaporator charging valve
Liquid refrigerant is charged into the system using the evaporator charging valve, which is the lowest access point on a low-pressure appliance.
100. When the TLV-TWA is exceeded in a machinery room, what does ASHRAE Standard 15-2013 require?
Correct answer: An alarm and a mechanical ventilation system
When the TLV-TWA is exceeded, ASHRAE Standard 15-2013 requires that each machinery room activate an alarm and a mechanical ventilation system.
Your score
What is EPA 608 Universal certification?
Universal certification means you passed all four sections of the EPA Section 608 exam: Core, Type I (small appliances), Type II (high-pressure systems), and Type III (low-pressure chillers). Passing all four earns Universal status, which authorizes you to purchase and handle any refrigerant in any quantity and service any stationary equipment type -- commercial, industrial, or residential -- without restriction. It is the most complete credential available under Section 608.
This 100-question practice test simulates the full proctored exam by drawing 25 questions from each section in order, matching the actual structure used by EPA-approved testing organizations. Every question has correct answers and plain-English explanations covering all four sections, and it is completely free with no signup required.
A free account unlocks the full 569-verified-question bank, weak-spot tracking, and score history across every session. Pro ($14.99 lifetime) adds AI Tutor sessions (up to 1,000 exchanges per month), focused weak-spot drills, the weak-spot radar, timed exam simulation, and offline access. Sign-in is optional; everything on this page is free and open.
Universal exam structure and passing scores
Each section of the Universal exam is scored separately. You need 72% in every section -- 18 out of 25 correct -- to pass that section. Passing three out of four does not award Universal certification; all four must be passed, though many proctors allow you to retake failed sections the same day. Important: for Universal certification, the Core section must be taken in a proctored setting. It cannot be substituted by a home-study or online-only format at organizations that require proctoring for Universal candidates.
Section
Questions
Passing score
Key focus areas
Core
25
18 of 25 (72%)
Montreal Protocol, Clean Air Act, ODP/GWP, recovery definitions, safety classifications
Type I
25
18 of 25 (72%)
Hermetically sealed systems, 5 lb charge limit, active and passive recovery, piercing valves
Type II
25
18 of 25 (72%)
Leak rates (10/20/30%), vacuum standards, IPR exceptions, high-pressure system service
Study strategy: Master Core first -- its regulations appear in questions across all four sections. Then focus on Type II, which covers the most common field scenarios. Finish with Type I and Type III. Scoring 80% or higher on this Universal practice test is a strong indicator of a first-attempt pass on the proctored exam.
Universal vs. individual type certifications
Individual type certifications restrict you to the specific equipment category you passed. A Type II-only technician cannot legally service Type I small appliances or Type III low-pressure chillers, and cannot purchase refrigerant outside the system types covered by that cert. Universal removes all of those restrictions. Most commercial HVAC employers require Universal certification because a single jobsite can involve centrifugal chillers (Type III), rooftop package units (Type II), and vending machines (Type I) on the same contract.
Frequently asked questions about the EPA 608 Universal exam
How many questions are on the EPA 608 Universal exam?
100 questions total -- 25 per section across Core, Type I, Type II, and Type III. Each section is scored independently. You need 72% (18 of 25 correct) in every section to pass. There is no combined score; all four sections must reach 72% individually.
What is the passing score for the Universal exam?
72% in each section -- that is 18 correct out of 25 questions per section. The passing threshold is the same for all four sections: Core, Type I, Type II, and Type III. Never 70%; the correct number is 18 of 25.
What does the Universal exam cover?
Universal covers all four Section 608 certification areas. Core covers the Montreal Protocol, Clean Air Act, ozone depletion, GWP, and refrigerant safety classifications. Type I covers small appliances (hermetically sealed, 5 lb or less). Type II covers high-pressure systems such as residential split systems and commercial package units. Type III covers low-pressure centrifugal chillers, purge units, and R-123 systems. Passing all four makes you Universal-certified.
Is this practice test free?
Yes. All 100 Universal practice questions with instant scoring, answers and explanations on this page are completely free with no signup required. A free account unlocks the full 569-question bank, weak-spot tracking, and score history across sessions. Pro ($14.99 lifetime) adds AI Tutor sessions, focused weak-spot drills, the weak-spot radar, timed exam simulation, and offline access.
Do I have to pass all four sections at once?
No. Many proctors allow retakes on failed sections the same day at no extra cost. Some testing organizations also let you carry passed sections and retake only the failed ones at a later session. Confirm the exact policy with your specific proctor before you sit the exam.
Does the Core section for Universal have to be proctored?
Yes. To earn Universal certification, the Core section must be completed in a proctored setting. Some organizations offer Type I, II, and III as home-study or online formats, but Core must be proctored when you are pursuing Universal. Check with your testing provider to confirm their format requirements.
What does Universal certification allow that individual type certs do not?
Universal certification authorizes you to purchase refrigerant in any quantity and service any system type covered by Section 608. Individual certifications restrict you to the specific equipment category you passed. A Type II-only technician cannot legally work on Type I small appliances or Type III low-pressure chillers. Universal removes all those restrictions.
Does EPA 608 Universal certification expire?
No. EPA Section 608 certification does not expire. Once earned, it is a permanent credential. That said, staying current on AIM Act HFC phase-down requirements is important for field competency as newer low-GWP refrigerants become standard.
Can I take the Universal exam online?
Yes, several EPA-approved organizations offer online proctored testing for Universal candidates. See online and in-person testing options for a current list of approved providers and exam formats.
How should I study for all four sections?
Start with Core -- its regulations underpin questions in all four sections. Then tackle Type II, which covers the most common field scenarios. Follow with Type I and Type III. Use this Universal practice test to find your weak sections, then drill those topics with our Weak Spot Drill. Scoring 80% or above here correlates strongly with first-attempt passes on the proctored exam.
Tools to deepen your EPA 608 preparation
After taking the practice test, use these tools to close remaining gaps before your exam date:
Weak Spot Drill: targets the question categories you've gotten wrong most often. Drill those specific topics until your accuracy improves.
