EPA-608 Core Certification Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which of the following is a major type of ozone-depleting substance?
a. Hydrocarbons
b. Chlorofluorocarbons (CFCs)
c. Nitrogen oxides
d. Carbon dioxide
Rationale: CFCs are the primary ozone-depleting substances
regulated under the Montreal Protocol.
2. Which class of refrigerants includes CFC-12?
a. Class I
b. Class I
c. Class II
d. Class III
, Rationale: Class I refrigerants, including CFCs, are known for their
high ozone depletion potential.
3. What is the main environmental concern with refrigerant leaks?
a. Global warming only
b. Water pollution
c. Ozone depletion
d. Soil contamination
Rationale: Refrigerant leaks, especially CFCs and HCFCs, deplete the
ozone layer, which protects life from UV radiation.
4. Under EPA regulations, what must technicians do before opening an
appliance for service?
a. Replace the compressor
b. Recover the refrigerant
c. Dispose of the appliance
d. Add oil to the system
Rationale: Technicians are required to recover refrigerants to prevent
their release into the atmosphere.
5. Which of the following is considered an acceptable method of
refrigerant recovery?
a. Venting to the atmosphere
b. Using EPA-approved recovery equipment
c. Burning refrigerant
d. Dissolving in water
, Rationale: Only certified recovery equipment is legal and safe for
capturing refrigerants.
6. What type of recovery is required when the compressor is to be
removed from a small appliance?
a. Passive recovery
b. No recovery needed
c. Active recovery
d. Pumping with a vacuum
Rationale: Active recovery ensures the refrigerant is safely removed
before the appliance is opened.
7. Which refrigerant has the highest ozone depletion potential?
a. HCFC-22
b. HFC-134a
c. CFC-12
d. R-410A
Rationale: CFCs have the highest ODP compared to HCFCs and HFCs.
8. What is the safe disposal method for appliances containing CFCs?
a. Dump in landfill
b. Recover refrigerant and recycle or destroy
c. Burn the appliance
d. Vent refrigerant into the air
Rationale: The EPA mandates recovery of ozone-depleting
refrigerants before disposal.
, 9. Which of the following is an acceptable leak repair method?
a. Using sealant without fixing the leak
b. Soldering or brazing the leak
c. Leaving the leak for later
d. Venting refrigerant
Rationale: Mechanical repairs like brazing effectively seal leaks;
sealants alone are not recommended.
10. Which refrigerant is considered a “drop-in” replacement for R-
12?
a. R-410A
b. R-22
c. R-134a
d. R-407C
Rationale: R-134a can be used as a retrofit replacement for R-12 in
some systems.
11. What does the term “reclaim” mean regarding refrigerants?
a. Use refrigerant without processing
b. Vent refrigerant
c. Process refrigerant to meet industry standards
d. Dispose of refrigerant in water
Rationale: Reclaimed refrigerant is processed to meet purity
standards and can be reused.
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which of the following is a major type of ozone-depleting substance?
a. Hydrocarbons
b. Chlorofluorocarbons (CFCs)
c. Nitrogen oxides
d. Carbon dioxide
Rationale: CFCs are the primary ozone-depleting substances
regulated under the Montreal Protocol.
2. Which class of refrigerants includes CFC-12?
a. Class I
b. Class I
c. Class II
d. Class III
, Rationale: Class I refrigerants, including CFCs, are known for their
high ozone depletion potential.
3. What is the main environmental concern with refrigerant leaks?
a. Global warming only
b. Water pollution
c. Ozone depletion
d. Soil contamination
Rationale: Refrigerant leaks, especially CFCs and HCFCs, deplete the
ozone layer, which protects life from UV radiation.
4. Under EPA regulations, what must technicians do before opening an
appliance for service?
a. Replace the compressor
b. Recover the refrigerant
c. Dispose of the appliance
d. Add oil to the system
Rationale: Technicians are required to recover refrigerants to prevent
their release into the atmosphere.
5. Which of the following is considered an acceptable method of
refrigerant recovery?
a. Venting to the atmosphere
b. Using EPA-approved recovery equipment
c. Burning refrigerant
d. Dissolving in water
, Rationale: Only certified recovery equipment is legal and safe for
capturing refrigerants.
6. What type of recovery is required when the compressor is to be
removed from a small appliance?
a. Passive recovery
b. No recovery needed
c. Active recovery
d. Pumping with a vacuum
Rationale: Active recovery ensures the refrigerant is safely removed
before the appliance is opened.
7. Which refrigerant has the highest ozone depletion potential?
a. HCFC-22
b. HFC-134a
c. CFC-12
d. R-410A
Rationale: CFCs have the highest ODP compared to HCFCs and HFCs.
8. What is the safe disposal method for appliances containing CFCs?
a. Dump in landfill
b. Recover refrigerant and recycle or destroy
c. Burn the appliance
d. Vent refrigerant into the air
Rationale: The EPA mandates recovery of ozone-depleting
refrigerants before disposal.
, 9. Which of the following is an acceptable leak repair method?
a. Using sealant without fixing the leak
b. Soldering or brazing the leak
c. Leaving the leak for later
d. Venting refrigerant
Rationale: Mechanical repairs like brazing effectively seal leaks;
sealants alone are not recommended.
10. Which refrigerant is considered a “drop-in” replacement for R-
12?
a. R-410A
b. R-22
c. R-134a
d. R-407C
Rationale: R-134a can be used as a retrofit replacement for R-12 in
some systems.
11. What does the term “reclaim” mean regarding refrigerants?
a. Use refrigerant without processing
b. Vent refrigerant
c. Process refrigerant to meet industry standards
d. Dispose of refrigerant in water
Rationale: Reclaimed refrigerant is processed to meet purity
standards and can be reused.
