EPA Section 608 Type I Certification
Mock Exam Newest Updated 150
Questions And Correct Answers From
Actual Past Papers Exams (Graded A+)
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1. What type of refrigerant is most commonly used in domestic refrigerators
manufactured before 1995?
A. R-134a
B. R-22
C. R-12
D. R-410A
Answer: C. R-12
R-12 (a CFC) was widely used before being phased out due to its ozone
depletion potential.
2. What does the ozone depletion potential (ODP) measure?
A. Refrigerant flammability
B. Global warming impact
C. Damage to the ozone layer
D. System pressure
Answer: C. Damage to the ozone layer
ODP indicates how harmful a substance is to the ozone layer compared to
R-11.
3. Which refrigerant has zero ozone depletion potential?
A. R-12
, B. R-22
C. R-134a
D. R-502
Answer: C. R-134a
R-134a is an HFC and does not contain chlorine, so it does not deplete
ozone.
4. What must technicians do before disposing of small appliances?
A. Add refrigerant
B. Recover refrigerant
C. Flush system
D. Pressurize system
Answer: B. Recover refrigerant
EPA regulations require recovery to prevent release into the atmosphere.
5. What is the primary environmental concern with CFCs?
A. Toxicity
B. Ozone depletion
C. Flammability
D. Corrosion
Answer: B. Ozone depletion
CFCs release chlorine atoms that destroy ozone molecules.
6. What is the standard evacuation level for Type I appliances?
A. 0 inches Hg
B. 4 inches Hg
C. 10 inches Hg
D. 15 inches Hg
Answer: B. 4 inches Hg
EPA specifies evacuation levels depending on appliance type and
compressor status.
7. What should be done if a system has a leak?
A. Recharge immediately
, B. Ignore leak
C. Repair before charging
D. Add oil
Answer: C. Repair before charging
Repairing leaks prevents refrigerant loss and environmental harm.
8. What color is a standard refrigerant recovery cylinder top?
A. Blue
B. Red
C. Yellow
D. Gray
Answer: D. Gray
Recovery cylinders are gray with yellow tops for identification.
9. Which refrigerant is considered an HCFC?
A. R-134a
B. R-22
C. R-12
D. R-600a
Answer: B. R-22
R-22 contains hydrogen, chlorine, fluorine, making it an HCFC.
10.What happens if refrigerant is released into the atmosphere?
A. Nothing
B. Improves efficiency
C. Environmental damage
D. System cooling improves
Answer: C. Environmental damage
Refrigerants can harm ozone or contribute to global warming.
11.What type of oil is used with R-134a?
A. Mineral oil
B. Alkylbenzene
C. POE oil
, D. Water
Answer: C. POE oil
Polyolester oil is compatible with HFC refrigerants like R-134a.
12.What is the purpose of a filter drier?
A. Add moisture
B. Remove moisture and contaminants
C. Increase pressure
D. Cool refrigerant
Answer: B. Remove moisture and contaminants
It protects the system from corrosion and blockages.
13.What is a hermetic compressor?
A. Open motor
B. Sealed unit
C. External motor
D. Air cooled only
Answer: B. Sealed unit
Hermetic compressors are fully sealed to prevent leaks.
14.What is the main function of refrigerant?
A. Lubricate
B. Transfer heat
C. Increase pressure
D. Clean system
Answer: B. Transfer heat
Refrigerants absorb and release heat during phase changes.
15.What must be done with recovered refrigerant?
A. Release
B. Store properly
C. Burn
D. Mix with oil
Mock Exam Newest Updated 150
Questions And Correct Answers From
Actual Past Papers Exams (Graded A+)
Plus Rationales 2025|2026 Q&A |
Instant Download Pdf
1. What type of refrigerant is most commonly used in domestic refrigerators
manufactured before 1995?
A. R-134a
B. R-22
C. R-12
D. R-410A
Answer: C. R-12
R-12 (a CFC) was widely used before being phased out due to its ozone
depletion potential.
2. What does the ozone depletion potential (ODP) measure?
A. Refrigerant flammability
B. Global warming impact
C. Damage to the ozone layer
D. System pressure
Answer: C. Damage to the ozone layer
ODP indicates how harmful a substance is to the ozone layer compared to
R-11.
3. Which refrigerant has zero ozone depletion potential?
A. R-12
, B. R-22
C. R-134a
D. R-502
Answer: C. R-134a
R-134a is an HFC and does not contain chlorine, so it does not deplete
ozone.
4. What must technicians do before disposing of small appliances?
A. Add refrigerant
B. Recover refrigerant
C. Flush system
D. Pressurize system
Answer: B. Recover refrigerant
EPA regulations require recovery to prevent release into the atmosphere.
5. What is the primary environmental concern with CFCs?
A. Toxicity
B. Ozone depletion
C. Flammability
D. Corrosion
Answer: B. Ozone depletion
CFCs release chlorine atoms that destroy ozone molecules.
6. What is the standard evacuation level for Type I appliances?
A. 0 inches Hg
B. 4 inches Hg
C. 10 inches Hg
D. 15 inches Hg
Answer: B. 4 inches Hg
EPA specifies evacuation levels depending on appliance type and
compressor status.
7. What should be done if a system has a leak?
A. Recharge immediately
, B. Ignore leak
C. Repair before charging
D. Add oil
Answer: C. Repair before charging
Repairing leaks prevents refrigerant loss and environmental harm.
8. What color is a standard refrigerant recovery cylinder top?
A. Blue
B. Red
C. Yellow
D. Gray
Answer: D. Gray
Recovery cylinders are gray with yellow tops for identification.
9. Which refrigerant is considered an HCFC?
A. R-134a
B. R-22
C. R-12
D. R-600a
Answer: B. R-22
R-22 contains hydrogen, chlorine, fluorine, making it an HCFC.
10.What happens if refrigerant is released into the atmosphere?
A. Nothing
B. Improves efficiency
C. Environmental damage
D. System cooling improves
Answer: C. Environmental damage
Refrigerants can harm ozone or contribute to global warming.
11.What type of oil is used with R-134a?
A. Mineral oil
B. Alkylbenzene
C. POE oil
, D. Water
Answer: C. POE oil
Polyolester oil is compatible with HFC refrigerants like R-134a.
12.What is the purpose of a filter drier?
A. Add moisture
B. Remove moisture and contaminants
C. Increase pressure
D. Cool refrigerant
Answer: B. Remove moisture and contaminants
It protects the system from corrosion and blockages.
13.What is a hermetic compressor?
A. Open motor
B. Sealed unit
C. External motor
D. Air cooled only
Answer: B. Sealed unit
Hermetic compressors are fully sealed to prevent leaks.
14.What is the main function of refrigerant?
A. Lubricate
B. Transfer heat
C. Increase pressure
D. Clean system
Answer: B. Transfer heat
Refrigerants absorb and release heat during phase changes.
15.What must be done with recovered refrigerant?
A. Release
B. Store properly
C. Burn
D. Mix with oil
