Free EPA 608 Practice Test · Exam Section
EPA 608 Type I Practice Test
25 exam-style questions, one at a time — just like exam day. Score and full explanations at the end. Free, no signup.
Type I certification covers small appliances: products fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant — household refrigerators and freezers, window air conditioners, PTACs, dehumidifiers, ice makers, vending machines, and water coolers. These 25 questions drill what the real Type I section tests: the small-appliance definition, recovery requirements with and without a working compressor (90 versus 80 percent, or 4 inches of mercury vacuum), and the recovery techniques specific to factory-sealed systems. Type I is also the only section offered as an unproctored open-book exam — with a higher 84 percent pass mark.
Want the full exam-day experience instead? Take the free 105-question Universal simulator — it runs this section alongside the other three, in the order the real exam presents them.
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Question 1 of 25.Under EPA Section 608, a small appliance is a product that was fully manufactured, charged, and hermetically sealed in a factory and contains how much refrigerant?
Prefer to read? All 25 questions with answers
Under EPA Section 608, a small appliance is a product that was fully manufactured, charged, and hermetically sealed in a factory and contains how much refrigerant?
- 15 pounds or less
- 5 pounds or less (correct answer)
- 50 pounds or less
- More than 5 but less than 15 pounds
The regulatory definition sets the limit at 5 pounds or less of refrigerant, in addition to the requirement that the unit be factory charged and hermetically sealed. The 15-pound figure is tempting because it appears elsewhere in the rules, but it is the maximum appliance charge on which system-dependent (passive) recovery equipment may be used, not part of the small appliance definition.
Which of the following does NOT meet the EPA definition of a small appliance?
- A household refrigerator with a 6-ounce charge
- A window air conditioner with a 2-pound charge
- A residential split-system air conditioner holding 4.5 pounds of refrigerant (correct answer)
- An under-the-counter ice maker with a 4-ounce charge
A split system is assembled in the field, where the line set and coil are connected and the final charge is set, so it is not hermetically sealed and fully charged in a factory even when it holds less than 5 pounds. The charge amount makes it a tempting choice, but both parts of the definition must be met; household refrigerators, window units, and under-the-counter ice makers are all factory-sealed products with small charges and are classic small appliance examples.
Which product is an example of a small appliance under Section 608?
- A beverage vending machine containing 1 pound of refrigerant (correct answer)
- An automobile air-conditioning system containing 2 pounds of R-134a
- A supermarket display case connected to a remote compressor rack
- A packaged rooftop unit containing 12 pounds of R-410A
Vending machines, along with household refrigerators and freezers, window air conditioners, PTACs, dehumidifiers, and drinking water coolers, are factory-sealed products with 5 pounds or less of refrigerant. The automobile system is the tempting distractor because its charge is under 5 pounds, but motor vehicle air conditioners are regulated under Section 609, not as Section 608 small appliances; the display case is field-connected to remote equipment, and the rooftop unit exceeds the 5-pound limit.
A technician holding only Type I certification is authorized to recover refrigerant from which of the following?
- A 20-ton packaged rooftop air conditioner
- A centrifugal chiller that operates in a vacuum
- A car's air-conditioning system at a repair shop
- A household dehumidifier (correct answer)
Type I certification covers small appliances, and a household dehumidifier is a factory-sealed unit with 5 pounds or less of refrigerant. The car's system is the tempting choice because its charge is also small, but servicing motor vehicle air conditioning requires Section 609 certification instead; the rooftop unit is a high-pressure appliance requiring Type II, and a chiller operating in a vacuum is a low-pressure appliance requiring Type III.
Which of the following is part of the EPA's stated definition of a small appliance?
- It contains more than 5 but less than 15 pounds of refrigerant
- It leaves the factory fully charged and hermetically sealed (correct answer)
- It uses only a CFC or HCFC refrigerant
- It was built after November 15, 1993
The definition requires that the unit be fully charged and hermetically sealed at the factory and contain 5 pounds or less of refrigerant. The 5-to-15-pound range is a tempting distractor because 15 pounds appears in the rules as the limit for system-dependent recovery equipment, but the definition caps the charge at 5 pounds. The refrigerant type does not matter, so units charged with HFCs such as R-134a are still small appliances, and November 15, 1993 is the cutoff after which recovery equipment must be third-party certified, not part of the appliance definition.
How do EPA's leak repair requirements and leak rate trigger thresholds apply to small appliances?
- Repairs are required once the annual leak rate exceeds 10 percent
- They apply only when the small appliance is used in a commercial setting
- They do not apply to small appliances (correct answer)
- They apply only to small appliances that use ozone-depleting refrigerants
Leak repair requirements cover ozone-depleting-refrigerant appliances with more than 50 pounds of charge under Section 608, and HFC appliances with 15 pounds or more under the AIM Act rules, so a small appliance with 5 pounds or less can never reach either threshold. The 10 percent figure is tempting because it is the real trigger rate for comfort-cooling appliances, but it only applies to appliances large enough to be covered. Venting from a leaking small appliance is still prohibited even though repair is not mandated.
When recovering refrigerant from a small appliance with an operating compressor, EPA requires certified recovery equipment to capture what portion of the refrigerant?
- 80 percent of the refrigerant in the appliance
- 70 percent of the refrigerant in the appliance
- 100 percent of the refrigerant in the appliance
- 90 percent of the refrigerant in the appliance (correct answer)
With an operating compressor, the standard is 90 percent recovery, because a running compressor helps drive refrigerant out of the oil and the low side of the system. The 80 percent figure is the tempting distractor since it is the correct standard when the compressor does not operate; 100 percent is not required because some refrigerant always remains absorbed in the oil, and technicians may alternatively evacuate the appliance to 4 inches of mercury vacuum.
A small appliance's compressor is burned out and will not run. To satisfy EPA recovery requirements, the technician must recover at least what percentage of the refrigerant?
- 90 percent
- 80 percent (correct answer)
- 95 percent
- 50 percent
When the compressor is not operating, the required recovery level drops to 80 percent because a dead compressor cannot help push refrigerant out of the system and the oil. The 90 percent figure is the tempting answer, but it applies only when the compressor operates; either percentage standard can be replaced by evacuating the appliance to 4 inches of mercury vacuum.
Instead of meeting the 80 or 90 percent recovery requirement, a technician recovering refrigerant from a small appliance may evacuate the appliance to:
- 4 inches of mercury vacuum (correct answer)
- 29 inches of mercury vacuum
- 500 microns
- 10 inches of mercury vacuum
The alternative standard for small appliances is evacuation to 4 inches of mercury vacuum, regardless of whether the compressor operates. The 10-inch figure is a tempting distractor because required evacuation levels of 0, 10, and 15 inches of mercury apply to larger high-pressure appliances covered by Type II, and 500 microns describes a deep evacuation used for dehydration before charging, not an EPA recovery requirement for small appliances.
Recovery equipment manufactured after November 15, 1993 and used to recover refrigerant from small appliances must be:
- Registered with the local fire marshal before each use
- Recalibrated by its manufacturer every 12 months
- Rated to handle appliances of at least 15 pounds of charge
- Certified by an EPA-approved third-party testing organization (correct answer)
Equipment built after November 15, 1993 must be tested and certified by an EPA-approved organization, such as AHRI or UL, to verify it can recover 90 percent with an operating compressor, 80 percent without, or pull 4 inches of mercury vacuum. Annual recalibration sounds plausible as a maintenance practice, but it is not an EPA requirement, and there is no fire marshal registration or minimum charge rating in the rule.
While recovering refrigerant from a window air conditioner with certified equipment and proper procedures, a technician loses a small amount of refrigerant when disconnecting a hose. Under Section 608, this release is:
- A de minimis release, which is not a violation of the venting prohibition (correct answer)
- A knowing venting violation subject to federal penalties
- Legal only because the appliance contains less than 1 pound of refrigerant
- An event that must be reported to the EPA within 30 days
Small releases that occur while making a good-faith attempt to recover refrigerant with proper, certified equipment are considered de minimis and are exempt from the venting prohibition. Calling it a violation is tempting because refrigerant did escape, but the rule targets knowing venting, not unavoidable losses during connection and disconnection; the appliance's size grants no venting privilege, and there is no 30-day reporting requirement for such losses.
Knowingly venting an HFC refrigerant such as R-134a while servicing a small appliance has been prohibited since:
- July 1, 1992
- November 15, 1993
- November 15, 1995 (correct answer)
- January 1, 2018
The venting prohibition was extended to substitute refrigerants, including HFCs like R-134a, on November 15, 1995. July 1, 1992 is the tempting distractor because that is when venting of CFC and HCFC refrigerants became illegal; November 15, 1993 is the recovery equipment certification cutoff, and January 1, 2018 is when the refrigerant sales restriction was extended to HFCs.
Which refrigerant is exempt from the Section 608 venting prohibition when released from a household refrigerator?
- R-134a
- R-12
- R-600a (isobutane) (correct answer)
- R-410A
EPA has exempted specific hydrocarbon refrigerants from the venting prohibition, but only in the end uses for which they are listed as acceptable, and isobutane (R-600a) in household refrigerators and freezers is one of those listings. R-134a is the tempting choice because it is the common refrigerant in domestic refrigerators, yet as an HFC it remains fully subject to the venting ban, as does R-410A; R-12 is a CFC and may never be vented.
During recovery from a small appliance, a significant amount of refrigerant remains dissolved in the compressor oil. Which technique helps release this trapped refrigerant?
- Flushing refrigerant out of the oil with compressed shop air
- Gently warming the compressor crankcase and briefly running the compressor (correct answer)
- Heating the compressor housing rapidly with a high-temperature torch
- Packing the compressor shell in ice during the recovery process
Heat, vibration, and brief compressor operation all help drive dissolved refrigerant out of the oil so the required percentage can be captured. Packing the compressor in ice is the tempting reversal because chilling does speed recovery, but ice belongs on the recovery cylinder, where lower temperature lowers pressure; chilling the compressor holds refrigerant in the oil. A torch risks overheating and breaking down the oil, and compressed air both contaminates the system and can explode when mixed with refrigerant oil under pressure.
What distinguishes self-contained (active) recovery equipment from system-dependent (passive) recovery equipment?
- Self-contained equipment has its own means, such as a compressor, of drawing refrigerant out of the appliance (correct answer)
- Self-contained equipment relies on the appliance's compressor to push refrigerant into the recovery cylinder
- Self-contained equipment is exempt from EPA certification requirements
- Self-contained equipment may only be used on appliances holding 15 pounds of refrigerant or less
Active, self-contained machines carry their own compressor or pump, so they can pull refrigerant from an appliance regardless of whether its compressor runs. The second option is tempting because it reverses the definitions, describing system-dependent equipment, which relies on the appliance's compressor or internal pressure. The 15-pound limit applies to system-dependent equipment, not self-contained machines, and both types made after November 15, 1993 must be certified.
System-dependent (passive) recovery equipment may only be used on appliances containing how much refrigerant?
- 5 pounds or less
- 50 pounds or less
- 10 pounds or less
- 15 pounds or less (correct answer)
EPA limits system-dependent recovery equipment to appliances with 15 pounds of refrigerant or less, because passive methods rely on the appliance's own compressor or pressure and cannot handle large charges. The 5-pound figure is the tempting answer since it defines a small appliance, but the passive equipment limit is a separate, higher threshold; 50 pounds is the charge size above which leak repair rules begin for ozone-depleting refrigerant appliances.
When using a system-dependent recovery process on a small appliance whose compressor does NOT operate, the technician should:
- Access both the high-pressure and low-pressure sides of the system (correct answer)
- Access only the high-pressure side of the system
- Pressurize the system with nitrogen before beginning recovery
- Replace the compressor before any recovery is attempted
With a dead compressor, opening access on both the high and low sides lets refrigerant escape from both parts of the circuit, which speeds recovery and helps reach the 80 percent requirement. Accessing only the high side is the tempting choice because that is the correct technique when the compressor is running and pushing refrigerant to the high side. Adding nitrogen before recovery would mix it with the refrigerant and contaminate the recovered charge, and the rules never require repairing a compressor just to recover.
During passive (system-dependent) recovery from a small appliance with an operating compressor, refrigerant should be recovered from:
- The low-pressure side of the system
- Either side, but only after the system is pressurized with nitrogen
- The compressor oil fill port
- The high-pressure side of the system (correct answer)
A running compressor pumps refrigerant toward the discharge line and condenser, so a passive recovery hookup on the high side captures the refrigerant the compressor delivers. The low side is the tempting answer because gauges commonly connect there for service readings, but during passive recovery with a working compressor the refrigerant is being pushed to the high side. Nitrogen is never added before recovery, and the oil fill port is not a refrigerant access point.
A vacuum pump may be used as part of a system-dependent recovery from a small appliance only when:
- The appliance's compressor is operating
- The refrigerant is an exempt hydrocarbon
- The refrigerant is transferred into a nonpressurized container (correct answer)
- The pump can pull the system down to 500 microns
A vacuum pump moves vapor but cannot compress refrigerant into a pressurized recovery cylinder, so it may only be used with a nonpressurized container. Requiring an operating compressor is the tempting distractor because compressor operation matters elsewhere in the Type I rules, but the vacuum pump method works whether or not the compressor runs; there is no 500-micron performance requirement for this method, and it applies to regulated refrigerants, not just exempt ones.
Which practice speeds the transfer of refrigerant into a recovery cylinder during system-dependent recovery from a small appliance?
- Warming the recovery cylinder with a heat gun
- Packing the recovery cylinder in ice (correct answer)
- Loosening the cylinder valve to bleed off pressure
- Filling the cylinder completely with liquid refrigerant
Cooling the cylinder lowers the pressure inside it, which increases the pressure difference that drives refrigerant from the appliance into the cylinder. Warming the cylinder is the tempting reversal, but heat raises cylinder pressure and slows or stops the transfer. Bleeding pressure from the valve would be illegal venting, and a recovery cylinder must never be completely filled; liquid expansion could rupture it, which is why fill limits are observed.
Which statement about solderless, piercing-type access fittings used on small appliances is TRUE?
- They form a permanent hermetic seal that is equivalent to a properly brazed fitting
- They may be installed on the sealed system only while the compressor is running
- They should be leak tested after installation and not left on the system as a permanent seal (correct answer)
- They are prohibited by EPA on any appliance that contains an HFC refrigerant
Piercing valves are a standard way to access a sealed small appliance system, but their gasketed, clamp-on design tends to leak as it ages, so the connection should be leak checked after installation and should not remain on the appliance as a permanent seal. Treating them as equal to a brazed joint is the tempting error, because a brazed connection is far more reliable long term; there is no rule tying their installation to compressor operation or banning them on HFC systems.
After recovering the refrigerant from a small appliance, a technician needs to pressurize and sweep the sealed system before repair. Which gas should be used?
- Compressed shop air
- Dry nitrogen (correct answer)
- Oxygen
- A trace charge of the original CFC refrigerant vented afterward
Dry nitrogen is inert and moisture free, making it the safe choice for pressurizing, sweeping, or leak testing a system. Compressed shop air is the tempting shortcut because it is readily available, but air contains oxygen and moisture, and oxygen mixed with compressed refrigerant oil can explode, which is also why pure oxygen must never be used. Charging refrigerant and then venting it would violate the venting prohibition.
Who is ultimately responsible for ensuring that refrigerant is removed from a household refrigerator before it is crushed or shredded for scrap?
- The final person in the disposal chain (correct answer)
- The homeowner who discarded the refrigerator
- The manufacturer of the refrigerator
- The EPA Regional Office serving the area
EPA places responsibility for refrigerant removal on the final person in the disposal chain, typically the scrap recycler or landfill that processes the appliance. The homeowner is the tempting answer because they discarded the unit, but individual consumers are not required to recover refrigerant themselves; the final processor must either recover any remaining refrigerant or obtain verification that it was already recovered upstream.
A scrap yard accepts small appliances whose refrigerant was recovered before delivery. To document this, the yard must obtain a signed statement that includes:
- The serial number and original charge amount of each appliance
- The Type I certification card number of the servicing technician
- The name and address of the person who recovered the refrigerant and the date it was recovered (correct answer)
- A laboratory purity analysis of the recovered refrigerant
The verification statement must identify who recovered the refrigerant, including their name and address, and state the date of recovery. The technician's certification number is the tempting choice because Type I certification is required to perform the recovery, but the regulation does not require the card number on the disposal statement, and neither serial numbers, charge amounts, nor laboratory analyses are part of the requirement.
Persons who recover refrigerant from small appliances for purposes of disposal must certify to the EPA that they:
- Employ at least one Universal-certified technician
- Reclaim all recovered refrigerant to AHRI 700 purity on site
- Inspect each appliance for leaks before beginning recovery
- Have acquired certified recovery equipment and are complying with the applicable regulations (correct answer)
The rule requires a one-time certification to the EPA stating that certified recovery equipment has been acquired and that the recovery rules are being followed. Requiring a Universal-certified technician is the tempting distractor, but Type I certification is sufficient for small appliance work; reclamation to the AHRI 700 standard is only required when recovered refrigerant changes ownership and is performed by EPA-certified reclaimers, and there is no pre-recovery leak inspection mandate.
FAQ: The EPA 608 Type I Exam
What counts as a small appliance under Type I?
A product that was fully manufactured, charged, and hermetically sealed in a factory and contains 5 pounds or less of refrigerant. That includes household refrigerators and freezers, window and room air conditioners, packaged terminal air conditioners and heat pumps, dehumidifiers, under-the-counter ice makers, vending machines, and drinking water coolers. A residential split system is not a small appliance — it is charged in the field, which is why servicing it requires Type II.
Can I really take the EPA 608 Type I exam open book at home?
Yes — Type I is the only certification that may be earned through an unproctored, open-book exam (Mainstream Engineering runs the best-known one, about $27 for a first attempt as of 2026). The trade-offs: the pass mark rises from 70 percent to 84 percent (21 of 25) in both the Core and Type I sections, and an open-book Core cannot later count toward Universal — you would retake Core proctored to upgrade.
What are the Type I recovery requirements I have to memorize?
The workhorse numbers: with recovery equipment manufactured after November 15, 1993, you must recover 90 percent of the charge when the appliance compressor works, 80 percent when it does not — or, in either case, evacuate to 4 inches of mercury vacuum. Type I questions circle these figures relentlessly, and the tempting distractors swap the percentages, so this drill makes you use them until they stop blurring.
Are these questions taken from the real EPA 608 exam?
No. Real exam items belong to the EPA-approved certifying organizations (ESCO Institute, Mainstream Engineering, and others) and are confidential — be wary of any site claiming to have them. Our questions are original, written to mirror the style, difficulty, and published EPA test topics for each section. Scoring well here is strong evidence you are ready, not a preview of the exact questions you will see.
What score do I need to pass the real EPA 608 exam?
The regulation sets the pass mark at 70 percent per section, which in practice means 18 of 25 correct (72 percent) on each 25-question section. The one exception is the open-book Type I route, which requires 84 percent — 21 of 25 — in both its Core and Type I sections. Certification never expires once earned, so passing is a one-time job.
Is this practice test really free?
Yes. Every question, explanation, and score report on HVACTechTest is free, with no signup, no credit card, and no trial that expires. Retake any test as many times as you want.
The Other EPA 608 Sections
25 questions
Type II — High-Pressure Appliances
Split systems, heat pumps, rooftop units, and supermarket refrigeration: evacuation levels, leak-rate triggers, and P-T relationships.
25 questions
Type III — Low-Pressure Appliances
Centrifugal chillers running in a vacuum: 25 mm Hg evacuation, the 10 psig leak-test ceiling, and ASHRAE 15 equipment rooms.
30 questions
Core — Required of Every Candidate
Ozone depletion, the venting prohibition, recovery/recycle/reclaim, safety, cylinders, and the HFC phasedown — the section everyone must pass.
Scoring above 70%? Time to book the real exam
Our certification guide compares where to take the EPA 608 exam — in person, online proctored, or open book — with verified 2026 costs. And if you are starting your HVAC career from scratch, a trade-school program pairs exam prep with the hands-on skills employers hire for.