TheoryEPA Section 608 Refrigerant
Practice Test
Core, Type I, II, III and Universal practice questions so your EPA 608 refrigerant card is in reach.
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EPA Section 608 Refrigerant exam — full Q&A walkthrough
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30 free EPA Section 608 Refrigerant questions
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EPA Section 608 Refrigerant
Under Section 608 of the Clean Air Act, knowingly releasing (venting) refrigerant while servicing an appliance is:
Correct — C. Section 608 prohibits the knowing release of refrigerant during the maintenance, service, repair, or disposal of appliances. The venting prohibition applied to CFCs and HCFCs starting July 1, 1992, and to most substitutes (including HFCs) starting November 15, 1995. -
EPA Section 608 Refrigerant
Which class of refrigerants contains chlorine and has the highest ozone-depletion potential?
Correct — B. Chlorofluorocarbons (CFCs) such as R-11 and R-12 are fully halogenated and contain chlorine, giving them the highest ozone-depletion potential. They have been phased out under the Montreal Protocol. -
EPA Section 608 Refrigerant
Which statement best describes an HFC refrigerant such as R-134a?
Correct — B. HFCs (hydrofluorocarbons) contain no chlorine, so their ozone-depletion potential is zero. They do, however, have a global-warming potential, which is why their use is also being managed. -
EPA Section 608 Refrigerant
What does the chlorine released from CFCs and HCFCs do in the stratosphere?
Correct — B. Once chlorine reaches the stratosphere, a single chlorine atom can destroy many ozone molecules in a repeating catalytic cycle, thinning the ozone layer that shields the Earth from ultraviolet radiation. -
EPA Section 608 Refrigerant
The 'three R's' of refrigerant management are:
Correct — B. Recover means to remove refrigerant and store it externally. Recycle means to clean it for reuse on site (oil separation, single or multiple passes). Reclaim means to reprocess it to meet the ARI/AHRI 700 new-product specification, which requires laboratory analysis. -
EPA Section 608 Refrigerant
Which term means cleaning recovered refrigerant for on-site reuse using oil separation and filtration, without testing it to a purity specification?
Correct — C. Recycling cleans refrigerant for reuse on the same site through oil separation and one or more passes through filter-driers. Unlike reclaiming, it does not require chemical analysis to a purity standard. -
EPA Section 608 Refrigerant
To be sold as 'reclaimed,' recovered refrigerant must be processed to meet which purity standard?
Correct — B. Reclaimed refrigerant must be reprocessed to the purity level specified by AHRI (formerly ARI) Standard 700 and verified by chemical analysis. Reclamation can only be performed off site by an EPA-certified reclaimer. -
EPA Section 608 Refrigerant
Before an appliance is opened for major service or disposal, the technician must first:
Correct — B. Refrigerant must be recovered into an approved external container before the appliance is opened or disposed of, because venting refrigerant to the atmosphere is prohibited. -
EPA Section 608 Refrigerant
A small, unavoidable release of refrigerant that occurs during a good-faith attempt to recover is known as:
Correct — B. Releases that are small and unavoidable during good-faith attempts to recycle or recover refrigerant (such as the loss when connecting or disconnecting hoses) are considered de minimis and are not treated as a violation of the venting prohibition. -
EPA Section 608 Refrigerant
Recovery and recycling equipment manufactured for use must be:
Correct — B. Recovery and recycling equipment must be certified by an EPA-approved testing organization (such as UL or AHRI) to meet EPA performance standards. -
EPA Section 608 Refrigerant
Who is required to be EPA-certified before purchasing regulated refrigerant in containers smaller than 20 pounds?
Correct — C. The sale of regulated refrigerant in containers smaller than 20 pounds is restricted to EPA Section 608 certified technicians. Since January 1, 2018, this sales restriction also applies to HFC and other substitute refrigerants. -
EPA Section 608 Refrigerant
Which EPA Section 608 certification type covers servicing all sizes and types of appliances?
Correct — D. A Universal certification is earned by passing the Core section plus the Type I, Type II, and Type III sections, qualifying the technician to service small appliances, high-pressure, and low-pressure equipment. -
EPA Section 608 Refrigerant
A disposable (non-refillable) refrigerant cylinder should be:
Correct — B. Disposable cylinders are DOT-approved for a single use only. Refilling them is illegal and dangerous because they are not built or tested for repeated pressurization. -
EPA Section 608 Refrigerant
When filling a refrigerant cylinder, the maximum it should be filled (by volume) is:
Correct — C. A refrigerant cylinder must never be filled past 80% of its volume by liquid. The remaining space allows the liquid to expand safely if the temperature rises, preventing hydrostatic rupture. -
EPA Section 608 Refrigerant
Recovery cylinders are required to be:
Correct — B. Refillable recovery cylinders must be DOT-approved pressure vessels. The recognized color code for a recovery cylinder is a gray body with a yellow shoulder/top. -
EPA Section 608 Refrigerant
Which gas should be used to pressure-test a refrigeration system for leaks?
Correct — C. Dry nitrogen (often with a trace of refrigerant for detection) is used to pressure-test for leaks. Oxygen and compressed air must never be used because mixing them with refrigerant oil under pressure can cause a violent explosion. -
EPA Section 608 Refrigerant
Refrigerant exposed to an open flame or very high temperature can decompose into:
Correct — B. When refrigerant contacts an open flame or a hot surface, it can break down into highly toxic and corrosive products such as phosgene, hydrofluoric acid, and hydrochloric acid. Always ventilate the area. -
EPA Section 608 Refrigerant
Liquid refrigerant contacting the skin or eyes can cause:
Correct — B. Liquid refrigerant boils at a very low temperature, so contact with skin or eyes can cause severe frostbite. Eye contact can cause blindness, so safety goggles and gloves should always be worn. -
EPA Section 608 Refrigerant
A large refrigerant leak in an enclosed, poorly ventilated space is dangerous mainly because the refrigerant can:
Correct — B. Most refrigerants are heavier than air and can accumulate near the floor of a confined space, displacing oxygen and creating an asphyxiation hazard. -
EPA Section 608 Refrigerant
Which oil is generally required with HFC refrigerants such as R-134a and R-410A?
Correct — B. HFC refrigerants are not compatible with mineral oil; they require synthetic polyolester (POE) lubricant. Mineral and alkylbenzene oils were used with CFCs and HCFCs. -
EPA Section 608 Refrigerant
Owners of appliances normally containing 50 pounds or more of refrigerant must:
Correct — B. Owners and operators of appliances with a full charge of 50 pounds or more must keep servicing records and must repair leaks that exceed the applicable annual leak-rate threshold within the required time. -
EPA Section 608 Refrigerant
Under the current leak-repair rule, the annual leak-rate trigger for comfort-cooling appliances is:
Correct — A. For comfort-cooling appliances with a charge of 50 pounds or more, leaks must be repaired when the annual leak rate exceeds 10%. (Commercial refrigeration is 20% and industrial process refrigeration is 30%.) -
EPA Section 608 Refrigerant
Under the current leak-repair rule, the annual leak-rate trigger for commercial refrigeration is:
Correct — C. Commercial refrigeration appliances with a 50-pound-or-greater charge must have leaks repaired when the annual leak rate exceeds 20%. -
EPA Section 608 Refrigerant
The international treaty that phases out the production of ozone-depleting substances is the:
Correct — B. The Montreal Protocol is the international agreement under which nations phase out the production and consumption of ozone-depleting substances such as CFCs and HCFCs. -
EPA Section 608 Refrigerant
When recovering refrigerant into a recovery cylinder, you must:
Correct — B. Recovery cylinders must be weighed so they are never filled beyond 80% of capacity. Overfilling leaves no room for liquid expansion and can cause the cylinder to rupture. A float or scale shutoff helps prevent overfilling. -
EPA Section 608 Refrigerant
Recovered refrigerant of an unknown or mixed type should be:
Correct — C. Mixed or contaminated refrigerant cannot be identified or cleaned to spec on site. It must be sent off for reclamation or destruction; it must never be vented or charged into a system. -
EPA Section 608 Refrigerant
The substitute-refrigerant program that reviews and lists acceptable alternatives is called:
Correct — A. EPA's Significant New Alternatives Policy (SNAP) program evaluates and lists substitutes for ozone-depleting substances as acceptable or unacceptable for specific end uses. -
EPA Section 608 Refrigerant
Which property describes how much a refrigerant contributes to thinning the ozone layer?
Correct — B. Ozone-Depletion Potential (ODP) measures a substance's ability to destroy stratospheric ozone, relative to CFC-11 which has an ODP of 1.0. Global-Warming Potential (GWP) is a separate measure of climate impact. -
EPA Section 608 Refrigerant
An access (piercing/saddle) valve installed to recover from a sealed system that has no service port should be:
Correct — B. Saddle/piercing valves can leak over time. After use they should be leak-checked, and many technicians remove or properly seal them rather than leaving an unreliable long-term connection. -
EPA Section 608 Refrigerant
Technician certification under Section 608 is:
Correct — B. EPA Section 608 technician certification does not expire and is valid nationwide. There is no renewal requirement under the current rule.
EPA Section 608 Refrigerant sample questions
Tap any question below to reveal the answer and a plain-English explanation.
Type1 A Type I certification covers servicing and disposing of:
A. Centrifugal chillers
B. Small appliances charged at the factory with 5 pounds or less of refrigerant ✓
C. Residential central air conditioners
D. Supermarket refrigeration racks
Correct — B. Type I covers small appliances: products that are fully manufactured, charged, and hermetically sealed at the factory with 5 pounds or less of refrigerant, such as refrigerators, window AC units, and dehumidifiers.
Type1 Which of these is a typical small appliance covered by Type I?
A. A 10-ton rooftop unit
B. A household refrigerator ✓
C. A 500-pound chiller
D. A supermarket rack system
Correct — B. Household refrigerators, freezers, window air conditioners, packaged terminal AC units, dehumidifiers, water coolers, and vending machines are small appliances under Type I, each sealed at the factory with 5 pounds or less of charge.
Type1 Using self-contained (active) recovery equipment on a small appliance whose compressor is operating, you must recover:
A. 80% of the refrigerant
B. 90% of the refrigerant ✓
C. 100% of the refrigerant
D. 50% of the refrigerant
Correct — B. With self-contained recovery equipment, you must recover 90% of the refrigerant from a small appliance when the appliance's compressor is operating.
Type1 Using self-contained recovery equipment on a small appliance whose compressor is NOT operating, you must recover:
A. 80% of the refrigerant ✓
B. 90% of the refrigerant
C. 95% of the refrigerant
D. 100% of the refrigerant
Correct — A. If the small appliance's compressor is not operating, self-contained recovery equipment must recover at least 80% of the refrigerant, because recovery is slower without the compressor's help.
About the EPA Section 608 Refrigerant test
Get ready for your EPA Section 608 refrigerant handling certification. EPA 608 certification is federally required for any technician who maintains, services, repairs, or disposes of appliances that could release refrigerants. This app covers the Core section plus Type I, Type II, and Type III so you can walk into the exam prepared and confident.
What you get
- 120 original practice questions covering the Core universal foundation, Type I small appliances, Type II high-pressure, and Type III low-pressure topics: refrigerant types (CFC/HCFC/HFC), recover/recycle/reclaim, leak-rate rules, cylinders, recovery vacuum levels, and safe handling.
- Plain-English explanations for every answer so you understand the reasoning, not just the answer.
- Timed mock exams that mirror the real test format and pass mark.
- Study by certification type to focus on your weak spots.
- Available in English, Spanish, and Portuguese.
You will be tested on
- Core refrigerant handling and recovery
- Type I, II and III equipment rules
- EPA regulations and the Clean Air Act
- Leak detection, safety and record-keeping
How TheoryPractice helps you pass
- Real exam-style questions with instant, detailed explanations
- Full timed mock exams that mirror the real test format
- Flashcards & quiz modes from the same question bank
- Progress tracking so you know exactly when you're ready
Topics in this question bank
Core refrigerant handling and recovery
Type I, II and III equipment rules
EPA regulations and the Clean Air Act
Leak detection, safety and record-keeping
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