10.9 - Universal Mock Examination 1 Answers

Purpose: Detailed post-examination review for the corresponding 100-question Universal mock examination
Regulatory verification date: August 14, 2026
Review rule: For every missed or guessed question, identify the controlling condition and explain why each competing option is wrong before marking the item corrected.

How to Use This File

1. Complete the corresponding mock examination closed-book before opening this file.
2. Score Core, Type I, Type II, and Type III separately.
3. Review every missed question and every correct answer that was guessed or uncertain.
4. Enter unresolved items in 10.10 - Error Analysis and Remediation.md.
5. For a current regulatory question, memorize the condition together with the rule or number.

Core Answers — Questions 1–25

Question 1

Correct answer: B. It absorbs much of the harmful ultraviolet radiation reaching Earth.

Stratospheric ozone absorbs much harmful UV radiation, especially UVB.

• A is incorrect: Ozone is not a refrigerant used for HVAC service.
• C is incorrect: Recovery-cylinder oxygen content is unrelated to stratospheric ozone.
• D is incorrect: Ozone does not block all outgoing infrared radiation.

Topic: Ozone layer and UV protection
EPA 608 section: Core
Error category: DEF

Question 2

Correct answer: A. Chlorine is regenerated in the catalytic ozone-destruction cycle.

Chlorine can be regenerated and participate repeatedly in catalytic ozone-destruction reactions.

• B is incorrect: Ozone destruction is chemical, not a freezing process.
• C is incorrect: Atmospheric density change is not the mechanism being tested.
• D is incorrect: Chlorine does not convert oxygen into nitrogen.

Topic: Ozone-depletion chemistry
EPA 608 section: Core
Error category: DEF

Question 3

Correct answer: B. HCFC

HCFCs contain chlorine and have nonzero ODP, although generally lower than CFCs.

• A is incorrect: HFCs contain no chlorine and have zero ODP.
• C is incorrect: HFOs contain no chlorine and have zero ODP.
• D is incorrect: Carbon dioxide contains no chlorine and has zero ODP.

Topic: Refrigerant families and ODP
EPA 608 section: Core
Error category: CLS

Question 4

Correct answer: B. An international agreement controlling ozone-depleting substances

The Montreal Protocol is the international agreement addressing the phaseout/control of ozone-depleting substances.

• A is incorrect: Cylinder transportation requirements are not the Montreal Protocol.
• C is incorrect: It is not a state licensing exam.
• D is incorrect: It is not a manufacturer warranty program.

Topic: Clean Air Act and Montreal Protocol
EPA 608 section: Core
Error category: DEF

Question 5

Correct answer: D. Recover the refrigerant rather than intentionally release it.

Covered refrigerant should be recovered rather than intentionally vented during service.

• A is incorrect: The venting prohibition is not removed merely because charge is below 50 lb.
• B is incorrect: Zero ODP does not by itself make a substitute exempt from the venting prohibition.
• C is incorrect: Dilution with nitrogen does not create permission to vent covered refrigerant.

Topic: Venting prohibition
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.154

Question 6

Correct answer: C. Section 609

Section 609 applies to MVAC service performed for consideration.

• A is incorrect: Type I is for small stationary appliances.
• B is incorrect: Type III is for low-pressure stationary appliances.
• D is incorrect: Universal Section 608 does not replace Section 609 for paid MVAC service.

Topic: Section 608 versus Section 609
EPA 608 section: Core
Error category: CLS
Regulatory basis: 40 CFR Part 82, Subpart B and current EPA 608/609 overlap guidance

Question 7

Correct answer: A. Attaching or detaching service gauges

Attaching or detaching gauges is a technician activity that can release refrigerant, although the definition of opening an appliance excludes that connection activity.

• B is incorrect: External insulation work does not normally affect the refrigerant circuit.
• C is incorrect: Painting does not normally affect the refrigerant circuit.
• D is incorrect: A mounting bolt unrelated to the refrigerant circuit does not normally require Section 608 certification.

Topic: Technician activities
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.152 technician/opening definitions

Question 8

Correct answer: B. Recover

Recover means remove refrigerant and store it externally without necessarily processing it.

• A is incorrect: Recycle includes cleaning for permitted reuse.
• C is incorrect: Dehydration removes moisture, typically by evacuation.
• D is incorrect: Reclaim means reprocessing and verifying purity to the applicable specification.

Topic: Recover recycle reclaim
EPA 608 section: Core
Error category: DEF
Regulatory basis: 40 CFR § 82.152 definitions

Question 9

Correct answer: D. Self-contained

Self-contained equipment can remove refrigerant without assistance from appliance components.

• A is incorrect: System-dependent equipment relies on appliance components to assist recovery.
• B is incorrect: Self-contained equipment is not limited to low-pressure appliances.
• C is incorrect: Disposable describes a container, not a recovery-equipment category.

Topic: Self-contained recovery equipment
EPA 608 section: Core
Error category: DEF
Regulatory basis: 40 CFR § 82.152

Question 10

Correct answer: B. More than 15 lb, unless the equipment is permanently attached as a pump-out unit

The current rule prohibits ordinary system-dependent equipment above a 15-lb full charge, except for the permanently attached pump-out provision.

• A is incorrect: Five pounds is part of the small-appliance definition, not this limit.
• C is incorrect: Fifty pounds relates to current Section 608 ODS leak-repair applicability, not the recovery-equipment limit.
• D is incorrect: Two hundred pounds changes some evacuation-table rows, not the system-dependent recovery limit.

Topic: System-dependent recovery limit
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.156(e)

Question 11

Correct answer: D. 70 lb

Maximum refrigerant weight is 0.80 × 50 = 40 lb; gross weight is 30 + 40 = 70 lb.

• A is incorrect: 40 lb is the refrigerant weight at 80% of 50 lb, not the gross cylinder weight.
• B is incorrect: 50 lb is the water-capacity marking, not the calculated gross weight.
• C is incorrect: 80 lb results from adding the full water capacity rather than the 80% training value.

Topic: Recovery-cylinder fill calculation
EPA 608 section: Core
Error category: CAL

Question 12

Correct answer: C. Do not refill it or use it as a recovery cylinder.

A disposable cylinder is a one-way container and must not be refilled or used for refrigerant recovery.

• A is incorrect: Disposable cylinders are not refillable recovery vessels.
• B is incorrect: Using a disposable cylinder as a vacuum reservoir is not its approved purpose.
• D is incorrect: Mixing refrigerants creates contamination and the cylinder is not approved for recovery.

Topic: Recovery versus disposable cylinders
EPA 608 section: Core
Error category: SAF

Question 13

Correct answer: A. 14.7 psia

At standard sea level, 0 psig corresponds to about 14.7 psia.

• B is incorrect: 0 psia represents a perfect vacuum, not atmospheric pressure.
• C is incorrect: 29.9 is commonly associated with inches of mercury atmospheric pressure, not psia.
• D is incorrect: Absolute pressure is not negative.

Topic: Gauge versus absolute pressure
EPA 608 section: Core
Error category: CAL

Question 14

Correct answer: D. Dew point

Dew point is used for vapor-side superheat calculations with zeotropic blends.

• A is incorrect: Bubble point is normally used for liquid-side/subcooling calculations.
• B is incorrect: Critical pressure alone does not give the saturation temperature needed for superheat.
• C is incorrect: Freezing point is not the saturation reference for superheat.

Topic: Blend bubble/dew points
EPA 608 section: Core
Error category: CAL

Question 15

Correct answer: D. It can contribute to acid formation, corrosion, and restrictions.

Moisture can cause acid, corrosion, ice formation, and restrictions.

• A is incorrect: Moisture contaminates rather than purifies the system.
• B is incorrect: Moisture can contribute to acid formation rather than prevent it.
• C is incorrect: Moisture increases the importance of proper drying and filter-drier service.

Topic: Moisture and contamination
EPA 608 section: Core
Error category: SAF

Question 16

Correct answer: B. Dry nitrogen used through a pressure regulator with downstream relief protection

Dry nitrogen through a regulator and relief protection is the proper pressure-test arrangement.

• A is incorrect: Oxygen can react dangerously with oil and refrigerant residues.
• C is incorrect: A nitrogen cylinder is at very high pressure and must not be connected without pressure control.
• D is incorrect: Compressed air can contain oxygen and moisture and is not the preferred test gas.

Topic: Nitrogen pressure testing
EPA 608 section: Core
Error category: SAF

Question 17

Correct answer: D. Frostbite and tissue injury

Rapid evaporation can remove heat and cause frostbite or eye injury.

• A is incorrect: Magnetization is unrelated to refrigerant contact.
• B is incorrect: Ozone depletion is an atmospheric environmental issue, not the immediate contact injury.
• C is incorrect: Refrigerants are not inherently an electrical-shock mechanism.

Topic: Refrigerant exposure safety
EPA 608 section: Core
Error category: SAF

Question 18

Correct answer: C. Clear the previous refrigerant from the machine as required before using it on the new refrigerant.

The machine should be cleared/purged according to its procedure before changing refrigerant streams.

• A is incorrect: Intentional mixing contaminates recovered refrigerant.
• B is incorrect: Adding air creates contamination and pressure problems.
• D is incorrect: Different refrigerants should not be mixed merely because they share a refrigerant family.

Topic: Cross-contamination control
EPA 608 section: Core
Error category: PRO

Question 19

Correct answer: A. Deep evacuation/dehydration to remove air and moisture

After the refrigerant-removal/service work, deep evacuation removes air and moisture before charging.

• B is incorrect: Reclamation is a separate refrigerant-processing activity.
• C is incorrect: Oxygen should not be used to pressurize a refrigeration system.
• D is incorrect: Intentional venting is prohibited unless a specific exemption applies.

Topic: Evacuation and dehydration
EPA 608 section: Core
Error category: PRO

Question 20

Correct answer: A. A leak or a significant path for gas entering the system

A rapid rise commonly indicates leakage or a significant gas path.

• B is incorrect: A well-dehydrated tight system should hold vacuum more steadily.
• C is incorrect: Recovery-cylinder fullness does not explain system vacuum decay after isolation.
• D is incorrect: Subcooling is not the primary interpretation of rapid vacuum loss.

Topic: Standing vacuum interpretation
EPA 608 section: Core
Error category: PRO

Question 21

Correct answer: C. Verify that acceptable prior recovery occurred.

The final processor may recover the refrigerant or use an allowed verification of prior recovery.

• A is incorrect: The disposer cannot simply assume refrigerant is absent.
• B is incorrect: Cutting lines can release refrigerant and does not satisfy safe-disposal requirements.
• D is incorrect: Adding nitrogen does not authorize intentional venting of covered refrigerant.

Topic: Safe disposal responsibility
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.155 and current EPA safe-disposal guidance

Question 22

Correct answer: A. 3 years

For appliances with full charge more than 5 and less than 50 lb, required technician disposal records are retained for three years.

• B is incorrect: One year is not the current retention requirement for these disposal records.
• C is incorrect: Thirty days is not the specified record-retention period.
• D is incorrect: The rule does not require these records for the life of the building.

Topic: Disposal recordkeeping
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(3)

Question 23

Correct answer: C. The recovery/recycling equipment

The evacuation and Type I percentage rules distinguish recovery/recycling equipment made or imported before versus on/after November 15, 1993.

• A is incorrect: The appliance cabinet date does not control these table columns.
• B is incorrect: Recovery-cylinder manufacture date is not the relevant date.
• D is incorrect: The compressor motor date does not control the requirement.

Topic: Recovery-equipment date
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.156

Question 24

Correct answer: A. Shorter, larger-diameter hoses generally reduce flow restriction and can speed recovery.

Shorter and larger-diameter hoses reduce pressure drop and generally improve recovery flow.

• B is incorrect: Long, small hoses increase restriction and slow recovery.
• C is incorrect: Heating the receiving cylinder raises pressure and is not the preferred speed-up method.
• D is incorrect: Useful access points can improve refrigerant removal; closing them can increase restriction or trapping.

Topic: Recovery speed factors
EPA 608 section: Core
Error category: PRO

Question 25

Correct answer: C. Pass Core, Type I, Type II, and Type III under the applicable secure proctored conditions.

Universal covers all three types and requires successful completion of Core, Type I, Type II, and Type III under qualifying test conditions.

• A is incorrect: Core alone is not Universal certification.
• B is incorrect: One equipment type plus Core produces a limited certification, not Universal.
• D is incorrect: Section 609 is a separate MVAC certification program and does not substitute for Type III.

Topic: Universal certification structure
EPA 608 section: Core
Error category: REG
Regulatory basis: 40 CFR § 82.161 and current EPA certification guidance

Type I Answers — Questions 26–50

Question 26

Correct answer: B. 5 lb

A small appliance contains 5 lb or less of refrigerant and meets the other factory conditions.

• A is incorrect: 2 lb is associated with a separate small-can MVAC sales concept, not the small-appliance definition.
• C is incorrect: 15 lb is associated with the ordinary system-dependent recovery-equipment restriction.
• D is incorrect: 50 lb is associated with current Section 608 ODS leak-repair applicability.

Topic: Small-appliance charge limit
EPA 608 section: Type I
Error category: REG
Regulatory basis: 40 CFR § 82.152

Question 27

Correct answer: D. Window air conditioner

A window air conditioner is a listed small-appliance example when it meets the definition.

• A is incorrect: A low-pressure absorption chiller is Type III.
• B is incorrect: A field-connected residential split system is normally Type II.
• C is incorrect: A supermarket rack is normally Type II.

Topic: Type I equipment examples
EPA 608 section: Type I
Error category: CLS
Regulatory basis: 40 CFR § 82.152

Question 28

Correct answer: A. 90%

Post-1993 recovery equipment with a functional appliance compressor requires 90% recovery under the percentage method.

• B is incorrect: Eighty percent applies to specified failed-compressor or pre-1993 equipment conditions.
• C is incorrect: Seventy percent is not a current Type I percentage requirement.
• D is incorrect: The regulation does not require 100% recovery under this percentage option.

Topic: Type I recovery percentage
EPA 608 section: Type I
Error category: REG
Regulatory basis: 40 CFR § 82.156(b)

Question 29

Correct answer: A. 80%

With post-1993 recovery equipment and a nonfunctional appliance compressor, the requirement is 80%.

• B is incorrect: Ninety-five percent is not the Type I percentage requirement.
• C is incorrect: The rule does not require 100% under this method.
• D is incorrect: Ninety percent applies when the appliance compressor is functional with post-1993 equipment.

Topic: Type I failed-compressor recovery percentage
EPA 608 section: Type I
Error category: REG
Regulatory basis: 40 CFR § 82.156(b)

Question 30

Correct answer: D. Evacuate the appliance to 4 in. Hg vacuum.

The current small-appliance rule permits evacuation to 4 in. Hg vacuum as an alternative.

• A is incorrect: Cylinder fill is a separate safety concept and does not determine appliance recovery completion.
• B is incorrect: 25 mm Hg absolute is the normal low-pressure Type III Table 1 endpoint.
• C is incorrect: 0 psig is not the Type I alternative endpoint.

Topic: Type I recovery endpoint
EPA 608 section: Type I
Error category: REG
Regulatory basis: 40 CFR § 82.156(b)

Question 31

Correct answer: A. Operate it so it assists refrigerant movement.

An operative compressor should be run so it helps move refrigerant during system-dependent recovery.

• B is incorrect: Disabling a usable compressor removes the assistance system-dependent recovery is intended to use.
• C is incorrect: Reversing polarity is not a Type I recovery procedure.
• D is incorrect: The compressor should not be used after opening a charged circuit.

Topic: Operating-compressor recovery
EPA 608 section: Type I
Error category: PRO

Question 32

Correct answer: C. They help remove refrigerant trapped on both sides of system restrictions.

Without compressor pumping, restrictions can trap refrigerant; high- and low-side access improves recovery.

• A is incorrect: Access fittings do not increase the intended refrigerant charge.
• B is incorrect: Access points do not authorize venting.
• D is incorrect: A compliant recovery method is still required.

Topic: Failed-compressor recovery access
EPA 608 section: Type I
Error category: PRO

Question 33

Correct answer: C. Use controlled warming and, where taught, sharply strike/tap the compressor.

Controlled warming and the traditional sharply striking/tapping technique can help release refrigerant from oil and internal pockets.

• A is incorrect: Cooling tends to reduce vapor pressure and can slow release.
• B is incorrect: Closing access points prevents refrigerant removal.
• D is incorrect: Oxygen must not be introduced into the refrigerant circuit for this purpose.

Topic: Failed-compressor recovery techniques
EPA 608 section: Type I
Error category: PRO

Question 34

Correct answer: B. A length of tubing that provides refrigerant access and can be resealed.

A process stub is access tubing that can be resealed after service.

• A is incorrect: It is not part of a recovery cylinder.
• C is incorrect: It is not an electrical component.
• D is incorrect: Small appliances do not define a process stub as a purge device.

Topic: Process stubs
EPA 608 section: Type I
Error category: DEF
Regulatory basis: 40 CFR § 82.152 definition

Question 35

Correct answer: C. Remove it, restore/reseal the tubing, and leak check the repair.

The fitting should be removed and the tubing restored/resealed and checked for leakage.

• A is incorrect: Current Type I exam emphasis is to avoid leaving these temporary leak-prone fittings permanently.
• B is incorrect: Opening the system to atmosphere would release refrigerant and contaminate the circuit.
• D is incorrect: A cylinder valve is not an appliance access repair.

Topic: Solderless access fittings
EPA 608 section: Type I
Error category: PRO

Question 36

Correct answer: D. It has its own means to remove refrigerant from the appliance.

Self-contained equipment has its own recovery means.

• A is incorrect: Requiring appliance assistance describes system-dependent equipment.
• B is incorrect: Self-contained equipment can use appropriate access based on the system and procedure.
• C is incorrect: A recovery machine and a vacuum pump serve different primary functions.

Topic: Self-contained Type I recovery
EPA 608 section: Type I
Error category: DEF
Regulatory basis: 40 CFR § 82.152

Question 37

Correct answer: A. Prepare the recovery setup so refrigerant can be captured promptly.

Preparing recovery equipment before opening access minimizes avoidable emissions.

• B is incorrect: Cutting first can release refrigerant.
• C is incorrect: Opening to atmosphere violates proper refrigerant-management practice.
• D is incorrect: Heating the receiving cylinder raises pressure and is unsafe as a recovery-speed method.

Topic: Type I recovery preparation
EPA 608 section: Type I
Error category: PRO

Question 38

Correct answer: C. Operate the compressor and recover from the high side.

Operating the compressor helps move refrigerant toward the high-side recovery connection.

• A is incorrect: The operative compressor should normally be used to assist recovery.
• B is incorrect: Nitrogen does not justify venting refrigerant.
• D is incorrect: A vacuum pump and pressurized recovery cylinder are not connected in that manner.

Topic: Operating-compressor high-side recovery
EPA 608 section: Type I
Error category: PRO

Question 39

Correct answer: D. Recovery is still required, but the technique must account for refrigerant trapped on both sides.

The recovery obligation remains; the procedure changes because the compressor cannot assist.

• A is incorrect: Compressor failure does not remove the recovery requirement.
• B is incorrect: Both sides may need access because refrigerant can be trapped by restrictions.
• C is incorrect: Post-1993 equipment with a failed compressor uses the 80% percentage condition.

Topic: Failed-compressor service decision
EPA 608 section: Type I
Error category: PRO
Regulatory basis: 40 CFR § 82.156(b)

Question 40

Correct answer: A. Use it with a nonpressurized recovery container as specified for that recovery method.

The Type I exam topic includes using a vacuum pump with a nonpressurized recovery container in the specified passive-recovery method.

• B is incorrect: Disposable cylinders are not approved recovery containers.
• C is incorrect: The refrigerant must be captured, not intentionally discharged through the pump.
• D is incorrect: A recovery container is still required.

Topic: Vacuum-pump passive recovery method
EPA 608 section: Type I
Error category: PRO

Question 41

Correct answer: B. R-134a is a common substitute used in many applications formerly served by R-12.

R-134a became a common non-ozone-depleting substitute in many former R-12 applications.

• A is incorrect: R-134a is an HFC, not a CFC, and has zero ODP.
• C is incorrect: R-12 is a CFC, not an HFO.
• D is incorrect: Different refrigerants should not be mixed in recovery cylinders.

Topic: Type I refrigerant substitution
EPA 608 section: Type I
Error category: DEF

Question 42

Correct answer: A. It can form hazardous decomposition products.

High heat and flame can decompose refrigerants into hazardous compounds.

• B is incorrect: Refrigerants do not simply become oxygen.
• C is incorrect: High temperature does not guarantee nonflammability.
• D is incorrect: Cylinder weight is not the hazard being tested.

Topic: Type I refrigerant decomposition safety
EPA 608 section: Type I
Error category: SAF

Question 43

Correct answer: D. Recover the refrigerant or verify that acceptable prior recovery occurred.

The final disposer must recover the refrigerant or use an allowed verification of prior recovery.

• A is incorrect: Disposal does not create permission to intentionally vent refrigerant.
• B is incorrect: The consumer does not need Universal certification merely to deliver an appliance for disposal.
• C is incorrect: Adding compressed air does not satisfy the recovery requirement and can create hazards.

Topic: Type I safe disposal
EPA 608 section: Type I
Error category: REG
Regulatory basis: Current EPA safe-disposal requirements

Question 44

Correct answer: C. Name, address, and date

The project’s current safe-disposal summary requires the statement to include name, address, and date.

• A is incorrect: A serial number alone is not the required signed-statement information.
• B is incorrect: Pressure alone does not verify who recovered refrigerant and when.
• D is incorrect: Scrap value is not the verification information.

Topic: Prior-recovery verification statement
EPA 608 section: Type I
Error category: REG
Regulatory basis: Current EPA safe-disposal guidance

Question 45

Correct answer: B. A qualifying contract with the regular supplier

A qualifying contract with a regular supplier can be used under the safe-disposal verification pathway.

• A is incorrect: A sticker alone is not sufficient verification.
• C is incorrect: An unrelated verbal statement is not acceptable documentation.
• D is incorrect: Recovery must occur before the appliance is dismantled in a way that releases refrigerant.

Topic: Safe-disposal contract pathway
EPA 608 section: Type I
Error category: REG
Regulatory basis: Current EPA safe-disposal guidance

Question 46

Correct answer: A. An accidental system failure that caused the refrigerant loss

An accident, system failure, or other unavoidable occurrence can support the leaked-out condition when properly documented.

• B is incorrect: Intentional venting is prohibited and cannot be converted into a leaked-out exception.
• C is incorrect: Avoiding recovery equipment is not a valid basis.
• D is incorrect: Deliberate line cutting is not an unavoidable prior loss.

Topic: Leaked-out disposal exception
EPA 608 section: Type I
Error category: REG
Regulatory basis: Current EPA safe-disposal guidance

Question 47

Correct answer: B. 3 years

The required records are retained for three years.

• A is incorrect: Thirty days is too short.
• C is incorrect: Six months is not the required period.
• D is incorrect: Retention is not tied to the manufacturer remaining in business.

Topic: Type I disposal record retention
EPA 608 section: Type I
Error category: REG
Regulatory basis: Current EPA safe-disposal requirements

Question 48

Correct answer: D. The complete system is not fully manufactured, charged, and hermetically sealed at a factory.

The complete factory conditions must be met in addition to the 5-lb-or-less charge limit.

• A is incorrect: Type I uses a maximum of 5 lb, not a minimum of 50 lb.
• B is incorrect: Low-pressure refrigerant classification, not a small charge, determines Type III.
• C is incorrect: Stationary mini-splits are not ordinary MVACs.

Topic: Small-appliance boundary case
EPA 608 section: Type I
Error category: CLS
Regulatory basis: 40 CFR §§ 82.152 and 82.161

Question 49

Correct answer: C. It raises refrigerant vapor pressure and helps trapped liquid evaporate.

Controlled warming can increase vapor pressure and help refrigerant leave cold components.

• A is incorrect: Temperature does not change certification type.
• B is incorrect: Warming does not create a venting exemption.
• D is incorrect: The purpose is refrigerant movement, not changing the cylinder tare weight.

Topic: Type I recovery speed
EPA 608 section: Type I
Error category: PRO

Question 50

Correct answer: B. It applies to the disposal activity, while ordinary service on the refrigerant circuit still requires appropriate certification.

The certification exception is limited to the disposal activity; it does not authorize uncertified service.

• A is incorrect: Compressor replacement is ordinary service and requires appropriate certification.
• C is incorrect: Recovery/safe-disposal duties remain.
• D is incorrect: The venting prohibition is not removed at scrap yards.

Topic: Type I service versus disposal
EPA 608 section: Type I
Error category: REG
Regulatory basis: 40 CFR § 82.152 technician definition and safe-disposal rules

Type II Answers — Questions 51–75

Question 51

Correct answer: A. Medium pressure

A pressure from 45 to 170 psia at 104°F is medium pressure.

• B is incorrect: Low pressure is below 45 psia at 104°F.
• C is incorrect: High pressure begins at 170 psia.
• D is incorrect: Very high pressure is above the high-pressure range or meets the critical-temperature criterion.

Topic: Pressure classification
EPA 608 section: Type II
Error category: CLS
Regulatory basis: 40 CFR § 82.152

Question 52

Correct answer: D. Type II

Current §82.161 places medium-, high-, and very-high-pressure appliances in Type II, subject to the listed exclusions.

• A is incorrect: Type I requires the complete small-appliance definition.
• B is incorrect: Section 609 applies to MVAC service, not this stationary process cooler.
• C is incorrect: Type III applies to low-pressure appliances.

Topic: Type II medium-pressure scope
EPA 608 section: Type II
Error category: CLS
Regulatory basis: 40 CFR § 82.161

Question 53

Correct answer: B. It is a possible leak indicator and the joint should be checked with an appropriate leak-detection method.

Oil is a useful clue, but an appropriate leak-locating method should confirm the leak.

• A is incorrect: Oil residue does not prove overcharge.
• C is incorrect: Oil residue alone does not prove noncondensables.
• D is incorrect: Oil near a joint can be associated with refrigerant leakage.

Topic: Type II leak indicators
EPA 608 section: Type II
Error category: PRO

Question 54

Correct answer: D. Dry nitrogen

Dry nitrogen is the preferred inert test gas when used with a regulator and relief protection.

• A is incorrect: Acetylene is flammable and not a refrigeration pressure-test gas.
• B is incorrect: Oxygen can react dangerously with oil or refrigerant residues.
• C is incorrect: Shop air adds oxygen and moisture and is not preferred.

Topic: Type II leak-test gas
EPA 608 section: Type II
Error category: SAF

Question 55

Correct answer: C. 20%

The current commercial refrigeration trigger is 20%.

• A is incorrect: 10% is the current rate for qualifying comfort cooling and other applicable appliances.
• B is incorrect: 15% is a historical value and is not the current commercial rate.
• D is incorrect: 30% is the current industrial process refrigeration trigger.

Topic: Commercial refrigeration leak rate
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.157(c)(2)

Question 56

Correct answer: C. At least 50 lb full charge and an applicable class I or class II ozone-depleting refrigerant or blend

The current Section 608 ODS leak-repair program applies to qualifying appliances with 50 lb or more of applicable ozone-depleting refrigerant.

• A is incorrect: The 200-lb boundary belongs to evacuation Table 1, not leak-repair applicability.
• B is incorrect: The 15-lb concept belongs to other current rules and the system-dependent recovery limit; it is not the §82.157 applicability test.
• D is incorrect: Type II certification category alone does not trigger the leak-repair rule.

Topic: Section 608 leak-rule applicability
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.157

Question 57

Correct answer: A. Recover liquid first, then recover the remaining vapor.

Liquid-first recovery moves mass rapidly, followed by vapor recovery to complete the process.

• B is incorrect: Heating the receiving cylinder raises pressure and can slow recovery.
• C is incorrect: Closing access to accessible liquid does not improve recovery speed.
• D is incorrect: Vapor-only recovery is slower when a large liquid mass is available.

Topic: Type II recovery sequence
EPA 608 section: Type II
Error category: PRO

Question 58

Correct answer: A. Lower cylinder pressure and recovery-machine back pressure

Cooling the receiving cylinder can reduce its pressure and lower the recovery machine discharge/back pressure.

• B is incorrect: Cooling does not change the allowable cylinder fill limit.
• C is incorrect: Reclamation requires separate processing and purity verification.
• D is incorrect: Cylinder weight must still be monitored.

Topic: Recovery speed and cylinder cooling
EPA 608 section: Type II
Error category: PRO

Question 59

Correct answer: C. Refrigerant may still be evaporating from oil or cold internal surfaces.

Residual liquid or refrigerant dissolved in oil can vaporize and cause pressure to rise.

• A is incorrect: Reclamation is unrelated to pressure rebound in the appliance.
• B is incorrect: Tare weight does not create appliance pressure rebound.
• D is incorrect: Pressure rebound does not change the refrigerant pressure classification.

Topic: Pressure rebound after recovery
EPA 608 section: Type II
Error category: PRO

Question 60

Correct answer: D. The appliance full charge

The rule is based on the appliance full charge.

• A is incorrect: Recovery rate does not determine the 15-lb restriction.
• B is incorrect: A leak that reduces the current amount does not change the full-charge criterion.
• C is incorrect: Cylinder tare weight is unrelated to appliance eligibility for system-dependent recovery.

Topic: System-dependent recovery full-charge rule
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156

Question 61

Correct answer: A. 0 in. Hg vacuum

A post-1993 high-pressure appliance with a full charge below 200 lb has a 0 in. Hg vacuum Table 1 requirement.

• B is incorrect: Four inches applies to certain pre-1993 rows, not this condition.
• C is incorrect: Ten inches applies to post-1993 high-pressure appliances at 200 lb or more and medium-pressure appliances below 200 lb.
• D is incorrect: Fifteen inches applies to post-1993 medium-pressure appliances at 200 lb or more.

Topic: Type II evacuation table
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156 Table 1

Question 62

Correct answer: B. 10 in. Hg vacuum

A post-1993 high-pressure appliance at 200 lb or more requires 10 in. Hg vacuum.

• A is incorrect: Zero applies to a post-1993 high-pressure appliance below 200 lb.
• C is incorrect: Fifteen inches is the post-1993 medium-pressure ≥200-lb requirement.
• D is incorrect: 25 mm Hg absolute is the low-pressure Type III endpoint.

Topic: Type II evacuation table
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156 Table 1

Question 63

Correct answer: B. 15 in. Hg vacuum

A post-1993 medium-pressure appliance at 200 lb or more requires 15 in. Hg vacuum.

• A is incorrect: Zero is not the post-1993 medium-pressure ≥200-lb requirement.
• C is incorrect: Four inches is the pre-1993 medium-pressure requirement.
• D is incorrect: Ten inches applies to post-1993 medium-pressure appliances below 200 lb.

Topic: Type II evacuation table
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156 Table 1

Question 64

Correct answer: C. Which evacuation row applies to certain high- and medium-pressure appliances

The 200-lb full-charge boundary changes certain high- and medium-pressure Table 1 requirements.

• A is incorrect: Cylinder fill is a different safety concept.
• B is incorrect: Small appliances use a 5-lb maximum charge condition.
• D is incorrect: The system-dependent equipment limit is greater than 15 lb full charge.

Topic: 200-lb evacuation boundary
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156 Table 1

Question 65

Correct answer: D. Compressor, condenser, evaporator, auxiliary heat-exchange coil

Removal of any of these four named refrigerant-circuit components is major by definition.

• A is incorrect: These external/service items do not constitute the named component-removal definition.
• B is incorrect: These items are not the four components named in the major-repair definition.
• C is incorrect: These items are not the complete named major-component list.

Topic: Major-repair named components
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.152

Question 66

Correct answer: A. Major, because the opening exceeds 4 in² for more than 15 minutes

Both conditions are exceeded: more than 4 in² and more than 15 minutes.

• B is incorrect: The numerical opening criterion can make work major even if no named component is removed.
• C is incorrect: The rule does not use a 15-in² threshold.
• D is incorrect: The major definition is not conditioned on a 200-lb charge.

Topic: Major repair opening criterion
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.152

Question 67

Correct answer: C. 0 psig

The qualifying non-major provision uses no higher than 0 psig.

• A is incorrect: 5 psig is the current special oil-change value.
• B is incorrect: 10 psig is not the qualifying non-major Type II ceiling.
• D is incorrect: 25 mm Hg absolute is the normal low-pressure Table 1 endpoint.

Topic: Non-major service provision
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(1)

Question 68

Correct answer: B. Isolate leaking from non-leaking components; evacuate non-leaking portions to Table 1 and the leaking portion to the lowest attainable level not above 0 psig.

The current exception requires isolation where possible, Table 1 for non-leaking portions, and the lowest attainable level not above 0 psig for the leaking portion.

• A is incorrect: Intentional venting is not the prescribed response.
• C is incorrect: Oxygen is unsafe for this purpose.
• D is incorrect: The rule specifically distinguishes leaking and non-leaking portions where isolation is possible.

Topic: Leaky appliance evacuation exception
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(2)

Question 69

Correct answer: D. A qualifying oil change

The current oil-change provision allows the applicable appliance, isolated portion, or receiver to be no higher than 5 psig before oil removal.

• A is incorrect: The normal low-pressure Table 1 endpoint is 25 mm Hg absolute.
• B is incorrect: Qualifying non-major Type II openings use no higher than 0 psig.
• C is incorrect: Normal disposal uses the applicable Table 1 endpoint unless an exception applies.

Topic: Oil-change special provision
EPA 608 section: Type II
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(1)(iii)

Question 70

Correct answer: D. Acid, carbon, moisture, and contaminated oil may be distributed through the system.

Burnout can create and distribute acids, carbon, particulates, and contaminated oil, requiring cleanup and drier attention.

• A is incorrect: Burnout does not reclaim refrigerant.
• B is incorrect: Cylinder fill monitoring remains necessary.
• C is incorrect: Pressure classification is based on refrigerant properties, not burnout.

Topic: Compressor burnout cleanup
EPA 608 section: Type II
Error category: SAF

Question 71

Correct answer: C. Confirm that the discharge path is open.

The discharge path must be open before operation.

• A is incorrect: A closed discharge path can create dangerous pressure on a positive-displacement compressor.
• B is incorrect: A compressor should not be used as a vacuum pump.
• D is incorrect: Safety controls should not be bypassed.

Topic: Reciprocating compressor safety
EPA 608 section: Type II
Error category: SAF

Question 72

Correct answer: B. Do not energize it under deep vacuum; use the external vacuum equipment.

A hermetic compressor should not be energized under deep vacuum because internal arcing or motor/terminal damage can occur.

• A is incorrect: Deep vacuum does not eliminate the electrical risk.
• C is incorrect: Bypassing protection is unsafe.
• D is incorrect: Oxygen should not be added to the refrigeration circuit.

Topic: Hermetic compressor under vacuum
EPA 608 section: Type II
Error category: SAF

Question 73

Correct answer: A. A warmer compressor/oil region that discourages refrigerant migration into the oil

Keeping the compressor/oil relatively warm helps reduce refrigerant migration and dilution of the oil.

• B is incorrect: Cooling the compressor would tend to attract refrigerant migration.
• C is incorrect: The heater is not used to close a discharge valve.
• D is incorrect: It does not create recovery-cylinder vacuum.

Topic: Crankcase-heater function
EPA 608 section: Type II
Error category: PRO

Question 74

Correct answer: A. Diagnose and correct causes such as poor condenser heat rejection, noncondensables, overcharge, or restriction.

The correct response is diagnosis and correction of the underlying cause.

• B is incorrect: Cylinder fill has no relation to operating head pressure.
• C is incorrect: Bypassing a safety control can create dangerous overpressure.
• D is incorrect: Opening a charged system would release refrigerant and is not a diagnostic remedy.

Topic: High-head-pressure safety
EPA 608 section: Type II
Error category: SAF

Question 75

Correct answer: B. That hoses, gauges, recovery equipment, and cylinders are rated and compatible for the pressure and refrigerant

All service equipment must be compatible and rated for the unusually high pressures involved.

• A is incorrect: Hose color alone does not establish pressure rating.
• C is incorrect: A fitting that physically connects may still be inadequately rated.
• D is incorrect: The Type I 5-lb definition does not control very-high-pressure equipment ratings.

Topic: Very-high-pressure equipment safety
EPA 608 section: Type II
Error category: SAF

Type III Answers — Questions 76–100

Question 76

Correct answer: A. Below 45 psia at 104°F

Below 45 psia at 104°F is the current low-pressure definition.

• B is incorrect: 45–170 psia is medium pressure.
• C is incorrect: 170–355 psia is high pressure.
• D is incorrect: Above 355 psia is part of the very-high-pressure criterion.

Topic: Low-pressure classification
EPA 608 section: Type III
Error category: CLS
Regulatory basis: 40 CFR § 82.152

Question 77

Correct answer: A. The refrigerant side is below atmospheric pressure and can draw air/moisture inward.

When refrigerant-side pressure is below atmospheric, an external leak path can admit air and moisture.

• B is incorrect: A pressure above 355 psia describes very-high-pressure conditions, not this behavior.
• C is incorrect: A purge unit does not create refrigerant from water.
• D is incorrect: Low-pressure refrigerants still follow pressure-temperature relationships.

Topic: Low-pressure inward leakage
EPA 608 section: Type III
Error category: PRO

Question 78

Correct answer: B. Purge unit

The purge unit separates/removes noncondensables while minimizing refrigerant loss.

• A is incorrect: A water box carries water and is not the noncondensable-removal device.
• C is incorrect: An oil pump circulates lubricant.
• D is incorrect: An expansion device is not the purge mechanism.

Topic: Purge-unit function
EPA 608 section: Type III
Error category: PRO

Question 79

Correct answer: C. Air is entering the system through a leak or infiltration path.

Frequent removal of noncondensables suggests continued air entry.

• A is incorrect: Frequent purging can be a sign of infiltration, not proof of tightness.
• B is incorrect: Reclamation is unrelated to purge frequency.
• D is incorrect: Recovery-cylinder fill does not cause a chiller purge unit to run.

Topic: Purge operation as leak clue
EPA 608 section: Type III
Error category: PRO

Question 80

Correct answer: D. Do not increase pressure above the Type III exam-preparation maximum.

The Type III exam-preparation maximum for this leak-test procedure is 10 psig.

• A is incorrect: Oxygen is not a proper test gas.
• B is incorrect: The 15-psig value is associated with a low-pressure recovery-vessel rupture disc in traditional exam preparation, not the chiller leak-test maximum.
• C is incorrect: A relief device should not be used as the normal stopping method.

Topic: Low-pressure leak-test maximum
EPA 608 section: Type III
Error category: SAF

Question 81

Correct answer: C. Controlled hot water or the built-in approved heating/pressurization method

Controlled heating is the preferred first method in the Type III exam framework.

• A is incorrect: Compressed air is not the preferred method and introduces moisture/oxygen.
• B is incorrect: Oxygen must not be used to pressurize refrigeration equipment.
• D is incorrect: A rupture disc is an emergency relief device, not a pressurization method.

Topic: Low-pressure leak-test pressurization
EPA 608 section: Type III
Error category: PRO

Question 82

Correct answer: B. Shaft seal

The shaft seal is a recognized leak location on open-drive equipment.

• A is incorrect: A water strainer may require maintenance but is not the refrigerant shaft-seal leak location.
• C is incorrect: A thermostat is not in the refrigerant circuit.
• D is incorrect: The recovery-cylinder foot ring is unrelated to the chiller refrigerant seal.

Topic: Open-drive shaft seal
EPA 608 section: Type III
Error category: PRO

Question 83

Correct answer: D. The bulk liquid refrigerant

Accessible bulk liquid is removed first because it moves refrigerant mass efficiently; vapor recovery follows.

• A is incorrect: Purge components are not the bulk refrigerant charge.
• B is incorrect: Oil removal is not the first bulk-refrigerant stage.
• C is incorrect: Chilled water is managed for freeze prevention, not recovered as refrigerant.

Topic: Liquid-first recovery sequence
EPA 608 section: Type III
Error category: PRO

Question 84

Correct answer: C. A substantial refrigerant vapor mass can still remain.

Removing visible liquid does not mean the chiller is empty; significant vapor and refrigerant in oil can remain.

• A is incorrect: Recovery lowers rather than intentionally raises refrigerant inventory/pressure.
• B is incorrect: Building cooling is not the purpose of recovery.
• D is incorrect: Refrigerant is not converted into water.

Topic: Type III vapor recovery
EPA 608 section: Type III
Error category: PRO

Question 85

Correct answer: A. The high-pressure cutout is performing its protective function.

A 10-psig high-pressure cutout is a traditional Type III recovery-equipment exam value.

• B is incorrect: The appliance evacuation endpoint is measured on the low-pressure side as 25 mm Hg absolute.
• C is incorrect: The separate traditional recovery-vessel rupture-disc value is 15 psig.
• D is incorrect: Further pressurization is not the response.

Topic: Low-pressure recovery-unit cutout
EPA 608 section: Type III
Error category: SAF

Question 86

Correct answer: A. 15 psig

15 psig is the traditional recovery-vessel rupture-disc exam value.

• B is incorrect: 10 psig is the traditional recovery-unit cutout.
• C is incorrect: 5 psig is the oil-change opening pressure limit.
• D is incorrect: 25 mm Hg absolute is the normal low-pressure appliance recovery endpoint.

Topic: Low-pressure recovery-vessel rupture disc
EPA 608 section: Type III
Error category: SAF

Question 87

Correct answer: B. To prevent water from freezing as refrigerant pressure and saturation temperature fall

Deep recovery lowers refrigerant saturation temperature; water can freeze and damage tubes unless it is circulated or removed as required.

• A is incorrect: Water circulation has no role in ODP.
• C is incorrect: Cylinder tare weight is unrelated.
• D is incorrect: Reclamation does not occur inside the chiller.

Topic: Freeze prevention during recovery
EPA 608 section: Type III
Error category: SAF

Question 88

Correct answer: B. Drain the evaporator and condenser water sides before recovery.

Draining both water sides reduces the risk that water will be drawn into the refrigerant circuit and freeze during recovery.

• A is incorrect: Increasing water pressure can worsen leakage into the refrigerant side.
• C is incorrect: Refrigerant is not added to water boxes for this procedure.
• D is incorrect: Ignoring trapped water increases freeze risk.

Topic: Tube-leak freeze prevention
EPA 608 section: Type III
Error category: PRO

Question 89

Correct answer: D. Refrigerant can continue to come out of solution from oil or evaporate from internal surfaces.

Residual refrigerant can vaporize from oil and surfaces after isolation.

• A is incorrect: Pressure classification is based on refrigerant properties, not temporary rebound.
• B is incorrect: A water pump does not reclaim refrigerant.
• C is incorrect: A purge unit does not create oxygen.

Topic: Type III pressure rebound
EPA 608 section: Type III
Error category: PRO

Question 90

Correct answer: A. 130°F

130°F is the traditional Type III oil-heating value used to reduce refrigerant release.

• B is incorrect: 115°F is not the value taught for this procedure.
• C is incorrect: 100°F is below the traditional exam value.
• D is incorrect: 150°F is not the exam value and unnecessary overheating should be avoided.

Topic: Type III oil heating
EPA 608 section: Type III
Error category: PRO

Question 91

Correct answer: C. 5 psig

The current oil-change special provision is no higher than 5 psig.

• A is incorrect: 25 mm Hg absolute is the normal Table 1 recovery endpoint, not the oil-change special value.
• B is incorrect: 0 psig applies to a qualifying non-major opening, but the oil-change provision specifically allows up to 5 psig.
• D is incorrect: 10 psig is the leak-test/recovery-unit exam value, not the oil-change rule.

Topic: Type III oil-change pressure
EPA 608 section: Type III
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(1)(iii)

Question 92

Correct answer: B. Evaporator charging valve

EPA Type III test topics identify the evaporator charging valve for charging centrifugal chillers.

• A is incorrect: A water-box vent is on the water side.
• C is incorrect: A recovery-vessel relief port is not the chiller charging connection.
• D is incorrect: An oil-drain valve is not the refrigerant charging connection.

Topic: Centrifugal-chiller charging connection
EPA 608 section: Type III
Error category: PRO

Question 93

Correct answer: A. Rapid flashing can lower refrigerant temperature enough to freeze water in the tubes.

Bulk liquid introduced into deep vacuum can flash rapidly and create severe cooling; vapor is introduced first to raise pressure and saturation temperature.

• B is incorrect: Charging does not reclaim refrigerant.
• C is incorrect: Charging sequence does not change the regulatory pressure category.
• D is incorrect: The purge unit cannot prevent the flashing process.

Topic: Vapor-first charging reason
EPA 608 section: Type III
Error category: SAF

Question 94

Correct answer: D. The required normal Type III evacuation endpoint has been reached.

The current Table 1 low-pressure endpoint is 25 mm Hg absolute.

• A is incorrect: The reading describes appliance pressure, not cylinder fill percentage.
• B is incorrect: Millimeters absolute and inches of Hg vacuum are different scales.
• C is incorrect: The value is not 25 psig.

Topic: Low-pressure Table 1 endpoint
EPA 608 section: Type III
Error category: REG
Regulatory basis: 40 CFR § 82.156 Table 1

Question 95

Correct answer: C. It is an absolute-pressure value and must not be confused with inches of mercury vacuum.

25 mm Hg absolute is the current low-pressure Table 1 endpoint and is not 25 in. Hg vacuum.

• A is incorrect: Millimeters absolute and inches of Hg vacuum use different units and reference conventions.
• B is incorrect: Cylinder fill is expressed as a percentage/weight concept.
• D is incorrect: The Type III leak-test exam maximum is expressed in psig, not mm Hg absolute.

Topic: Type III vacuum units
EPA 608 section: Type III
Error category: CAL

Question 96

Correct answer: D. 0 psig

The current qualifying non-major provision uses no higher than 0 psig for a low-pressure appliance.

• A is incorrect: 15 psig is the recovery-vessel rupture-disc exam value.
• B is incorrect: 5 psig is the special oil-change value.
• C is incorrect: 10 psig is the Type III leak-test/recovery-unit exam value.

Topic: Type III non-major opening
EPA 608 section: Type III
Error category: REG
Regulatory basis: 40 CFR § 82.156(a)(1)(ii)

Question 97

Correct answer: D. A refrigerant monitor measures refrigerant concentration, while an oxygen monitor measures oxygen concentration.

Refrigerant and oxygen monitors have distinct sensing functions.

• A is incorrect: The instruments measure different quantities.
• B is incorrect: A monitor reading does not determine OSHA confined-space classification by itself.
• C is incorrect: An oxygen monitor does not identify refrigerant species.

Topic: Machinery-room monitoring
EPA 608 section: Type III
Error category: SAF

Question 98

Correct answer: B. The pit and room must be evaluated by their actual configurations and hazards; the label “machinery room” alone does not decide OSHA confined-space status.

Confined-space classification depends on the space configuration and hazards; pits or other enclosures may require separate evaluation.

• A is incorrect: The room name alone does not automatically make it permit-required.
• C is incorrect: Some individual spaces can meet confined-space criteria.
• D is incorrect: A refrigerant monitor does not make the legal classification by itself.

Topic: Machinery room and confined-space distinction
EPA 608 section: Type III
Error category: SAF

Question 99

Correct answer: C. That water-side hazardous energy is isolated and trapped/static pressure has been relieved.

Water-side pumps/energy must be isolated and pressure relieved before opening the water box.

• A is incorrect: Cylinder condition does not establish water-side safety.
• B is incorrect: Purge operation does not isolate water pressure.
• D is incorrect: A thermostat does not isolate pumps or trapped pressure.

Topic: Water-side service safety
EPA 608 section: Type III
Error category: SAF

Question 100

Correct answer: A. Provide non-reclosing emergency overpressure relief.

A rupture disc is a non-reclosing pressure-relief device.

• B is incorrect: Refrigerant metering is not its function.
• C is incorrect: The purge unit handles noncondensables.
• D is incorrect: It does not measure water flow.

Topic: Rupture-disc function
EPA 608 section: Type III
Error category: SAF

References

Current Regulatory and EPA Sources

• U.S. Environmental Protection Agency, Section 608 Test Topics, reviewed August 14, 2026.
• U.S. Environmental Protection Agency, Section 608 Technician Certification Requirements, reviewed August 14, 2026.
• Electronic Code of Federal Regulations, 40 CFR Part 82, Subpart F, current text reviewed August 14, 2026.
• 40 CFR § 82.152 — Definitions.
• 40 CFR § 82.154 — Prohibitions.
• 40 CFR § 82.155 — Safe disposal of appliances.
• 40 CFR § 82.156 — Proper evacuation of refrigerant from appliances.
• 40 CFR § 82.157 — Appliance maintenance and leak repair.
• 40 CFR § 82.161 — Technician certification.