EPA 608 Type I Answer Explanations
Type I focuses on small appliances and the recovery decisions that appear in questions about sealed household and similar equipment. This page is intended for learners preparing for the Type I section, including those who are working through all sections toward Universal certification. The question set covers identifying a small appliance, choosing compatible recovery equipment, understanding compressor condition, and recognizing handling hazards. A familiar appliance name is only a starting point: read the description of how it was manufactured and charged before choosing an answer.
Many Type I questions turn on the difference between self-contained and system-dependent recovery. Others change a single detail, such as whether the appliance compressor works, to test whether you understand the recovery requirement rather than recall an isolated percentage. Keep the equipment date and the alternative vacuum method in view when reviewing those explanations.
After a practice session, use this page to compare your reasoning with the correct answer. Focus on the condition that made your selected option incorrect, then revisit that topic in the Type I study guide. The practice test provides another chance to work through the same concepts with the answers hidden. These explanations support exam preparation; the linked rules and manufacturer information supply the context behind equipment-specific procedures.
Most-missed topics
Use these review prompts to catch common mix-ups in this question set; they are not a ranking based on learner scores.
- Small-appliance definition: The appliance must be factory-made, factory-charged, and hermetically sealed with five pounds or less of refrigerant.
- Compressor condition: The small-appliance percentage recovery requirement depends on recovery-equipment age and whether the compressor functions.
- Alternative recovery endpoint: Four inches of mercury vacuum is an alternative small-appliance recovery method under § 82.156(b).
- Recovery equipment: Self-contained equipment has its own recovery mechanism; system-dependent equipment relies on the appliance or its pressure.
Sources: EPA Section 608 definitions and 40 CFR § 82.156 recovery requirements. See each answer for related study material.
Type I study guide · Type I practice test · Answer hub
Type I
How should seal and gasket compatibility with a replacement refrigerant be determined?
Correct answer: C. Verify compatibility using manufacturer data for the specific refrigerant, lubricant, and elastomer.
Compatibility depends on the particular refrigerant, lubricant, elastomer formulation, temperature, and application.
After the refrigerant has been recovered, which of the following can be used to flush the system?
Correct answer: C. Nitrogen
After refrigerant recovery, dry nitrogen can be used for flushing. Oxygen or compressed air should not be used because they can create safety and contamination hazards.
What condition can produce acidic contamination during a compressor failure?
Correct answer: B. A compressor burnout has likely occurred.
A motor burnout can contaminate the refrigerant and oil with decomposition products. Follow the manufacturer's acid-testing and cleanup procedure. Odor alone does not identify the refrigerant or prove a burnout; do not intentionally inhale refrigerant.
Which of the following is true regarding refrigerant leaks on small appliances?
Correct answer: A. EPA does not require repair, but leaks should be repaired whenever possible.
EPA has no leak-repair requirement for small appliances. Section 608 leak repair applies to appliances with 50 pounds or more of ozone-depleting refrigerant, and the HFC rule in 40 CFR 84 applies to 15 pounds or more. Repairing leaks is still the best practice.
📖 Related rule: § 82.157 — Appliance Maintenance and Leak Repair
When pressurizing a system with nitrogen you should;
Correct answer: C. Use a pressure regulator and downstream relief valve in the line.
Nitrogen cylinders are high-pressure cylinders. A regulator and downstream relief valve protect the system from being over-pressurized during leak testing.
A small appliance is defined by EPA as;
Correct answer: D. Factory-charged, hermetically sealed appliances with 5 lbs or less of refrigerant.
EPA defines a small appliance as factory-made, factory-charged, hermetically sealed, and containing 5 pounds or less of refrigerant.
Which of the following is an example of a non-condensable?
Correct answer: B. Air
Air is a non-condensable because it does not condense under normal refrigeration system operating conditions. Non-condensables can raise system pressure and reduce efficiency.
If regulations change after the technician becomes certified;
Correct answer: C. The technician is responsible for complying with regulatory changes.
Certification does not freeze the rules in place. Technicians are responsible for learning and following later regulatory changes.
When a hermetic refrigerant system is under a deep vacuum, which action must be avoided?
Correct answer: C. Never energize the compressor.
A compressor motor should not be energized in a deep vacuum because the reduced dielectric strength can damage motor windings.
Which HC refrigerant is allowed for use in NEW Domestic Small Appliances ?
Correct answer: C. R-600a
R-600a is isobutane, a hydrocarbon refrigerant approved for certain new domestic small appliances. It is not a general retrofit refrigerant for existing systems.
Self-contained or active recovery equipment
Correct answer: B. Has its own means to recover refrigerant.
Self-contained, or active, recovery equipment has its own compressor or recovery mechanism. System-dependent equipment relies on the appliance or system pressure.
How must regulated refrigerant vapor removed from the top of a graduated charging cylinder be handled?
Correct answer: A. Capture it using appropriate recovery equipment.
Venting regulated refrigerant from a charging cylinder is not allowed as a normal practice. Vapor removed from the cylinder must be recovered.
Type I Certification is required for
Correct answer: A. Persons handling refrigerant during service or repair of small appliances.
Type I or Universal certification covers refrigerant service and repair on small appliances containing regulated refrigerants. People who only recover refrigerant from small appliances for disposal are exempt from technician certification, but still must follow applicable recovery rules. Source: 40 CFR 82.161.
Technicians who perform sealed-system service on small appliances must have;
Correct answer: B. Type I or Universal certification.
Small appliance sealed-system work requires Type I certification. Universal certification also qualifies because it includes Type I.
Recovery equipment manufactured or imported on or after November 15, 1993 must be:
Correct answer: B. Certified by an EPA-approved testing laboratory.
EPA-approved organizations certify Section 608 recovery/recycling equipment against applicable performance requirements. EPA lists AHRI and UL for this program. Older equipment has separate grandfathering conditions. Source: 40 CFR 82.158 and EPA equipment-certification guidance.
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should
Correct answer: C. Run the compressor and recover from the high side of the system only.
With an operating compressor and system-dependent recovery, the appliance compressor can help move refrigerant to the high side for recovery.
How should an ammonia/water/hydrogen absorption refrigerator be handled at end of life?
Correct answer: B. Follow specialist procedures; do not use incompatible halocarbon recovery equipment for these fluids.
Absorption-system contents require appropriate handling for ammonia and hydrogen hazards. Conventional halocarbon recovery equipment must not be used unless expressly rated for the contents. A refrigerant's regulatory exemption is not permission for unsafe disposal.
Small appliances are equipped with a straight piece of tubing (process stub) that is used;
Correct answer: A. As the installation location for a piercing-type access valve.
The process stub is a straight piece of tubing used to access the sealed system. A piercing-type access valve can be installed there for recovery or service.
During recovery, controlled warming of a compressor, where permitted by the manufacturer, can:
Correct answer: B. can help vaporize any trapped liquid refrigerant during recovery.
Approved controlled warming can release refrigerant trapped in oil or as liquid. Follow equipment instructions and refrigerant safety precautions; do not use flames or unapproved heat sources, particularly around flammable refrigerants.
Unless permanently attached as a pump-out unit, system-dependent recovery equipment may be used only on appliances with a full charge of:
Correct answer: C. 15 pounds of refrigerant or less.
The limit is a full charge of 15 pounds or less, with an exception for permanently attached pump-out units. This is different from the five-pound, factory-sealed small-appliance definition. Source: 40 CFR 82.156(e).
What distinguishes system-dependent recovery equipment?
Correct answer: A. It relies on appliance pressure or components to remove refrigerant.
System-dependent equipment relies on components or pressure in the appliance. Use the recovery device and compatible collection container exactly as specified by the manufacturer; a generic drum or disposable cylinder is not a substitute.
When using a system-dependent recovery system on an appliance that has a non-operating compressor, the technician should
Correct answer: A. Place access fittings on both the low and high side.
When the compressor will not run, refrigerant can remain trapped on both sides of the system. Access to both the high and low sides improves recovery.
For a small appliance with a nonfunctioning appliance compressor, recovery equipment manufactured on or after November 15, 1993 must recover:
Correct answer: D. 80 percent of the refrigerant or achieving 4 inches of vacuum.
For a non-operating compressor in this Type I context, the recovery target is 80 percent of the refrigerant or 4 inches of vacuum.
Recovering multiple types of refrigerants in the same cylinder
Correct answer: B. contaminates the contents and can complicate or prevent reclamation.
Keep different refrigerants in separate, labeled compatible cylinders. Some certified reclaimers can separate certain mixtures; others may require destruction. Do not assume every mixture is reclaimable or that none can be reclaimed, and never vent it.
📖 Related rule: § 82.152 — Definitions (recover, recycle, reclaim)
A small appliance reads 0 psig after an access fitting is installed. Which action meets the vacuum alternative for recovery?
Correct answer: A. Utilize recovery equipment to achieve a 4-inch vacuum.
Zero gauge pressure does not prove that the appliance is empty. For a small appliance, the vacuum alternative is 4 inches Hg vacuum; the applicable percentage-recovery path is another option. Source: 40 CFR 82.156(b).
A cylinder label must contain what type of information about the refrigerant?
Correct answer: B. Type and amount of refrigerant
A cylinder label must clearly identify the type of refrigerant and the amount (net weight) inside. Knowing the exact contents prevents cross-contamination during charging or recovery. Cylinder hazard marking comes from DOT rules, not a Section 608 label requirement.
📖 Related rule: Core Study Guide — Refrigerant Cylinders and Handling
What is the EPA definition of a small appliance?
Correct answer: C. Manufactured, charged and hermetically sealed in a factory and contains five pounds or less of refrigerant
EPA defines a small appliance under §82.152 as one fully manufactured, charged, and hermetically sealed in a factory containing 5 pounds or less of refrigerant — household refrigerators, window ACs, water coolers, dehumidifiers, vending machines. The 5-pound threshold determines which Type I rules and recovery requirements apply.
Which best describes the definition of Type I “Small Appliance”, as defined by EPA?
Correct answer: A. Factory-made, charged, sealed systems with 5 pounds or less of refrigerant.
EPA defines a Type I 'small appliance' specifically as a system manufactured, charged, and hermetically sealed at the factory with 5 lb or less of refrigerant — examples include household refrigerators, freezers, window AC units, water coolers, and dehumidifiers. Just being small or sealed isn't enough; it must be all three (factory-made, factory-charged, factory-sealed). Central AC and field-charged units don't qualify.
Which statement is correct for a factory-built, factory-charged, hermetically sealed PTAC containing 5 pounds or less, compared with an MVAC?
Correct answer: A. A PTAC qualifies as a small appliance, but an MVAC does not.
That PTAC meets the small-appliance definition. An MVAC is treated separately. Not every PTAC qualifies: the factory construction, sealed configuration, and charge-size conditions must all be met. Source: 40 CFR 82.152.
When recovering refrigerant from a small appliance using recovery equipment manufactured on or after November 15, 1993, which recovery targets apply?
Correct answer: A. 80% with a nonfunctioning compressor or 90% with a functioning compressor; alternatively, 4 inches Hg vacuum.
Under 40 CFR 82.156(b), recover 90% when the compressor functions or 80% when it does not. Evacuating to 4 inches Hg vacuum is an alternative, not an additional requirement after percentage recovery.
What is the maximum amount of refrigerant a small appliance can have by definition?
Correct answer: B. 5 pounds or less
A small appliance has five pounds or less and is fully manufactured, charged, and hermetically sealed in a factory. Charge size alone is not sufficient, and exceeding five pounds does not automatically trigger leak-repair requirements. Source: 40 CFR 82.152.
The sale of Class I and Class II refrigerants will be restricted to technicians certified by an EPA approved program after:
Correct answer: D. November 14, 1994
The Class I/Class II refrigerant sales restriction began November 14, 1994. The rule includes qualifying certified-technician purchasers and specified exceptions, including employer purchases. Refer to 40 CFR 82.154(c) for purchaser eligibility rather than assuming every buyer must personally hold the same certification.
Who is responsible for complying with the laws if the EPA changes the laws after technician certification?
Correct answer: B. It is the responsibility of the technician to comply with any future changes in the law
Once certified, the technician personally remains responsible for following current EPA rules — certification is permanent, but it does not freeze the regulations. When EPA updates Section 608 or adds related requirements under laws such as the AIM Act, the technician must learn which rule applies. The company and equipment owner have separate responsibilities, but personal compliance is on the technician.
Regulated refrigerant vapor removed from the top of a graduated charging cylinder during filling:
Correct answer: C. Not be vented and must be recovered.
Vapor released from the top of a graduated charging cylinder is refrigerant and must be recovered, not vented. Section 608 prohibits intentional venting of refrigerant during service, including the small amounts released to set a charging cylinder's level.
Should regulations of the Clean Air Act (CAA) change after a technician is certified:
Correct answer: C. The technician must learn and comply with future law changes.
Certification is permanent and does not require retesting when EPA changes the rules — but the technician is personally responsible for staying current with the law. Grandfathering (ignoring changes) is not a valid defense for a violation. Higher-score retests aren't part of how Section 608 works.
For small-appliance recovery using equipment manufactured before November 15, 1993, which target applies?
Correct answer: B. Capable of recovering 80% of the refrigerant whether or not the compressor is operating or achieve a 4 inch vacuum.
Recover 80% of the refrigerant, or use the alternative of 4 inches Hg vacuum. This question concerns small appliances, not all appliance types. Source: 40 CFR 82.156(b).
What power source does a system-dependent small-appliance recovery device rely on?
Correct answer: A. The appliance's pressure or components rather than an independent recovery compressor.
System-dependent equipment relies on the appliance. Follow the device's instructions and applicable recovery targets; the appliance compressor need not function for every passive method. Source: 40 CFR 82.152 and 82.156.
For a small appliance with a functioning appliance compressor, what target applies using recovery equipment manufactured on or after November 15, 1993?
Correct answer: D. Be capable of recovering 90% of the refrigerant with the compressor operating or achieve a 4 inch vacuum.
Recover 90% of the refrigerant or evacuate to 4 inches Hg vacuum. Compressor condition refers to the appliance's compressor, not the recovery machine's compressor. Source: 40 CFR 82.156(b).
For a small appliance with a nonfunctioning appliance compressor, what target applies using recovery equipment manufactured on or after November 15, 1993?
Correct answer: B. Be capable of recovering 80% of the refrigerant without the compressor operating or achieve a 4 inch vacuum
Recover 80% of the refrigerant or evacuate to 4 inches Hg vacuum. This is determined by appliance-compressor condition, not by whether the recovery device has its own compressor. Source: 40 CFR 82.156(b).
Before disposing of a small appliance containing R-12, it is necessary to:
Correct answer: B. Recover the refrigerant
R-12 must be recovered from the small appliance before disposal using the applicable percentage-recovery or 4-inch-Hg-vacuum alternative. The rule is not a requirement to prove absolutely no molecules remain. Source: 40 CFR 82.156(b).
📖 Related rule: § 82.157 — Appliance Maintenance and Leak Repair
What is a low-loss fitting and why is it needed?
Correct answer: B. A manual or automatic closing fitting that limits refrigerant loss at disconnect.
A low-loss fitting closes manually or automatically to reduce refrigerant released when hoses are connected or disconnected. Use appropriate fittings and equipment practices; it does not eliminate the duty to recover refrigerant.
A system has been operating with a complete restriction at the capillary tube inlet, what access is required for recovery?
Correct answer: B. Two access valves, on the high and low sides of the system
A complete restriction at the cap-tube inlet isolates the high side from the low side, so refrigerant on each side can't equalize through the metering device. To recover both sides, you must install two access valves — one each on the high and low side. A single valve would only get the side it's on, leaving refrigerant trapped in the other half.
What does the service aperture on a small appliance typically look like?
Correct answer: B. A straight tube entered with a piercing access valve.
A factory process tube can provide temporary service access using suitable equipment. Follow the manufacturer's procedure and complete an approved permanent seal or fitting afterward. A process stub, piercing valve, and Schrader service valve are not identical components.
The U.S. phaseout of most CFC production and import for ordinary use took effect in:
Correct answer: D. 1996
The main U.S. CFC phaseout took effect January 1, 1996, subject to specified exemptions. It did not prohibit all continued use of previously produced CFCs in existing equipment. Follow recovery, sales, and other applicable requirements.
What should be done with leaks in small appliances?
Correct answer: A. Leak repair is not mandatory, but it should be done whenever possible.
Small appliances are below the charge thresholds for the Section 608 ODS and AIM Act leak-repair programs, but leaks should be repaired where practical. Applicable recovery and venting rules still matter, as can other requirements. Do not generalize this exemption to all appliances below 50 pounds.
📖 Related rule: § 82.157 — Appliance Maintenance and Leak Repair
For sealed-system service on small appliances containing regulated refrigerant, which Section 608 certification qualifies?
Correct answer: D. A or C above
Type I certification is required to work on small appliances; Universal (which covers Types I, II, and III) also qualifies. Type II is for high-pressure equipment and doesn't cover small appliances. So both 'Type I' and 'Universal' are correct, making 'A or C above' the right answer.
How can you tell what type of refrigerant is in a system?
Correct answer: A. Check the nameplate and service records; use a refrigerant identifier if contents are uncertain.
Labels identify the intended refrigerant, but a previous retrofit or contamination can make actual contents uncertain. A compatible identifier can help; pressure-temperature comparison alone cannot conclusively identify unknown or mixed refrigerant.
📖 Related rule: Core Study Guide — Refrigerant Cylinders and Handling
When using a pressure-temperature chart for a pure refrigerant, what does the chart let you determine?
Correct answer: A. Expected saturation pressure for that refrigerant at a given temperature.
A pure refrigerant's saturation chart relates temperature to saturation pressure. It does not by itself prove refrigerant identity, purity, charge amount, or correct operating pressure. Blends can require distinct bubble- and dew-point values.
What might happen if a cylinder containing mixed refrigerants is given to a reclamation center?
Correct answer: A. The center may refuse it, return it at the owner's expense, or charge to destroy it.
Acceptance and fees depend on the mixture and reclaimer. Some facilities can separate and reclaim certain mixtures; others may reject them or require destruction. Keep mixtures separate, label them, and ask the certified reclaimer rather than assuming the outcome.
📖 Related rule: § 82.152 — Definitions (recover, recycle, reclaim)
What is the difference between self-contained and system-dependent recovery equipment?
Correct answer: A. Self-contained equipment has its own compressor; system-dependent relies on the appliance.
Self-contained equipment provides its own recovery capability; system-dependent equipment relies on the appliance. The distinction concerns the recovery device, not the storage cylinder. Refrigerant compatibility, ratings, and applicable use limits still apply.
What are things that can cause high recovery discharge pressures?
Correct answer: A. Closed tank inlet valve or excess air in the system.
High discharge pressure during recovery usually means refrigerant has nowhere to go — a closed cylinder valve, a kinked hose, or non-condensable air mixed in with the refrigerant raising pressure above the saturation curve. Hot ambient or undersized cylinders can also drive pressure up. Cold ambient and oversized cylinders generally lower discharge pressure, so those answers are wrong.
For a known refrigerant with liquid and vapor present in a cylinder at stable, uniform temperature, what may indicate noncondensables?
Correct answer: B. Pressure above the applicable saturation pressure at the measured cylinder temperature.
A comparison requires a known refrigerant, the proper saturation data, liquid and vapor present, and thermal equilibrium. A high result suggests contamination but is not a complete analysis. Do not bleed a cylinder into the atmosphere; consult the reclaimer or approved equipment procedure.
Before comparing cylinder pressure with saturation data, what temperature condition is needed?
Correct answer: B. A stable, uniform, measured cylinder temperature.
Allow thermal equilibrium and measure the actual temperature. Merely being in a room is not sufficient if the cylinder was recently filled or heated. The comparison also requires known refrigerant and appropriate phase conditions.
📖 Related rule: Core Study Guide — Refrigerant Cylinders and Handling
What is the proper role of an ordinary vacuum pump during refrigeration service?
Correct answer: A. Remove air and moisture after refrigerant has been recovered.
A vacuum pump used for dehydration is not a refrigerant recovery machine. Do not route refrigerant through its exhaust. Any preparation of an empty recovery container must follow the equipment manufacturer's instructions without venting refrigerant.
When using a system-dependent recovery system with an operating compressor, where should the refrigerant be recovered from?
Correct answer: A. High side of the system
When the appliance compressor is operating, system-dependent recovery is performed from the high side because the compressor is actively pumping refrigerant to that side. Drawing from the high side captures the charge most efficiently while the compressor still runs.
When using a system-dependent recovery system with a non-operating compressor, where should the refrigerant be recovered from?
Correct answer: C. Both high and low side
For passive recovery with a failed small-appliance compressor, access to both sides can be needed because restrictions may trap refrigerant. Follow the device and appliance instructions and verify the applicable recovery target.
How can you release trapped refrigerants in the oil during recovery?
Correct answer: A. Use only manufacturer-approved methods to warm the oil or otherwise release trapped refrigerant.
Refrigerant can remain dissolved in oil. Compatible recovery equipment and approved controlled warming can help remove it. Do not apply a torch, unapproved heat gun, or arbitrary electrical heating around refrigerant.
A "small appliance" under Section 608 is one that is fully manufactured, charged, and hermetically sealed in a factory with how much refrigerant?
Correct answer: B. 5 pounds or less
Section 608 §82.152 defines a small appliance as one fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant. This 5-pound threshold determines which sales restrictions, evacuation levels, and Type I rules apply. The 2-, 10-, and 50-pound numbers are distractors from other parts of the regulation.
Using the vacuum alternative in 40 CFR 82.156(b)(3), a small appliance must be evacuated to:
Correct answer: B. 4 inches of mercury vacuum
Section 82.156(b)(3) permits evacuation to 4 inches Hg vacuum as an alternative to percentage recovery. With pre-November-15-1993 recovery equipment, the percentage option is 80%; with newer equipment it is 90% for a functioning compressor or 80% for a nonfunctioning compressor.
Using recovery equipment manufactured on or after November 15, 1993, what percentage must be recovered from a small appliance with a functioning compressor if the percentage path is used?
Correct answer: C. 90% of the refrigerant
The percentage path is 90% with a functioning appliance compressor and 80% with a nonfunctioning compressor. Evacuation to 4 inches Hg vacuum is an alternative. Source: 40 CFR 82.156(b).
For known refrigerant with liquid and vapor present at thermal equilibrium, pressure above its applicable saturation value can suggest:
Correct answer: B. The presence of non-condensables such as air.
Noncondensables can add pressure above the expected saturation value. This comparison needs the correct refrigerant data and measured equilibrium temperature; an arbitrary operating head-pressure reading is not the same test.
To recover refrigerant from a small appliance with an inoperative compressor using a system-dependent (passive) device, a technician may:
Correct answer: B. Use the recovery-device manufacturer's approved methods to release refrigerant trapped in oil.
A failed compressor can leave refrigerant trapped in oil or isolated sections. Follow approved recovery procedures, compatible equipment, and required targets. Do not route refrigerant through an ordinary vacuum pump's exhaust or use an unapproved ignition source.
When recovering from a small appliance with an inoperative compressor, access valves should be installed:
Correct answer: C. On both the high and low sides
Restrictions can prevent refrigerant in both sides from reaching a single recovery point. Both-side access may be needed with a nonfunctioning compressor; use the manufacturer's procedure and verify recovery rather than assuming perfect equalization.
When using a system-dependent (passive) recovery device on a small appliance with an OPERATIVE compressor:
Correct answer: A. Operate the appliance's compressor during recovery.
If the small-appliance compressor still works, a passive recovery device should operate the appliance's compressor during recovery so it pumps refrigerant out into the recovery container. The appliance's own pumping action is what allows the unit to reach the higher 90% recovery level required for working compressors.
Temporary saddle/piercing fittings not approved for permanent installation should be:
Correct answer: B. Removed at the conclusion of service.
Remove temporary fittings and complete the manufacturer's approved permanent seal or access arrangement. Temporary gasketed piercing fittings can develop leaks; follow the particular fitting's approval and instructions.
📖 Related rule: § 82.157 — Appliance Maintenance and Leak Repair
Which HFC became a common replacement for R-12 in small appliances?
Correct answer: B. R-134a
R-134a became a common replacement in newly designed small appliances and approved retrofits. It is not a universal drop-in. Lubricant and component requirements depend on the manufacturer and application; other refrigerants are also used in newer equipment.
When chlorinated refrigerants encounter open flames or very hot surfaces, they can produce:
Correct answer: B. Hazardous byproducts including phosgene and hydrogen chloride.
Chlorinated refrigerants can form hazardous decomposition products including hydrogen chloride and phosgene. Other refrigerants have different hazardous decomposition products. Follow the SDS and hot-work requirements.