EPA Section 608 Type II Certification
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What type of refrigerant is typically used in high-pressure appliances?
A. R-11
B. R-123
C. R-22
D. R-113
Answer: C. R-22
Rationale: R-22 is a high-pressure refrigerant commonly used in air
conditioning and refrigeration systems.
2. What is the ozone depletion potential (ODP) of CFCs compared to HCFCs?
A. Lower
B. Equal
C. Higher
D. Zero
Answer: C. Higher
Rationale: CFCs have a higher ODP than HCFCs, making them more
harmful to the ozone layer.
,3. Recovery equipment must be certified by:
A. OSHA
B. EPA-approved laboratory
C. Manufacturer
D. Local authority
Answer: B. EPA-approved laboratory
Rationale: The EPA requires recovery equipment to be tested and certified
by approved labs.
4. What is the required evacuation level for appliances with more than 200 lbs
of refrigerant using recovery equipment manufactured after Nov 15, 1993?
A. 0 in Hg
B. 10 in Hg
C. 15 in Hg
D. 20 in Hg
Answer: C. 15 in Hg
Rationale: EPA mandates 15 inches Hg vacuum for large high-pressure
systems.
5. Which refrigerant has the highest global warming potential (GWP)?
A. R-134a
B. R-410A
C. R-22
D. R-12
Answer: D. R-12
Rationale: R-12 has very high GWP compared to newer refrigerants.
6. When must a leak be repaired in systems with >50 lbs refrigerant?
A. Immediately
B. Within 30 days
C. Within 90 days
D. Only during maintenance
Answer: B. Within 30 days
Rationale: EPA requires repair within 30 days for significant leaks.
, 7. What is the leak rate threshold for comfort cooling appliances?
A. 10%
B. 15%
C. 20%
D. 30%
Answer: B. 15%
Rationale: Leak rate threshold is 15% annually for comfort cooling
systems.
8. Which device prevents refrigerant release during service?
A. Gauge manifold
B. Schrader valve
C. Low-loss fitting
D. Recovery tank
Answer: C. Low-loss fitting
Rationale: Low-loss fittings reduce refrigerant emissions during
connection/disconnection.
9. What color is a recovery cylinder?
A. Gray body, yellow top
B. Blue
C. Red
D. Green
Answer: A. Gray body, yellow top
Rationale: Standard color coding for recovery cylinders.
10.What happens if air enters a refrigeration system?
A. Increases efficiency
B. Decreases pressure
C. Raises head pressure
D. Lowers temperature
Answer: C. Raises head pressure
Rationale: Non-condensables increase system pressure and reduce
efficiency.
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What type of refrigerant is typically used in high-pressure appliances?
A. R-11
B. R-123
C. R-22
D. R-113
Answer: C. R-22
Rationale: R-22 is a high-pressure refrigerant commonly used in air
conditioning and refrigeration systems.
2. What is the ozone depletion potential (ODP) of CFCs compared to HCFCs?
A. Lower
B. Equal
C. Higher
D. Zero
Answer: C. Higher
Rationale: CFCs have a higher ODP than HCFCs, making them more
harmful to the ozone layer.
,3. Recovery equipment must be certified by:
A. OSHA
B. EPA-approved laboratory
C. Manufacturer
D. Local authority
Answer: B. EPA-approved laboratory
Rationale: The EPA requires recovery equipment to be tested and certified
by approved labs.
4. What is the required evacuation level for appliances with more than 200 lbs
of refrigerant using recovery equipment manufactured after Nov 15, 1993?
A. 0 in Hg
B. 10 in Hg
C. 15 in Hg
D. 20 in Hg
Answer: C. 15 in Hg
Rationale: EPA mandates 15 inches Hg vacuum for large high-pressure
systems.
5. Which refrigerant has the highest global warming potential (GWP)?
A. R-134a
B. R-410A
C. R-22
D. R-12
Answer: D. R-12
Rationale: R-12 has very high GWP compared to newer refrigerants.
6. When must a leak be repaired in systems with >50 lbs refrigerant?
A. Immediately
B. Within 30 days
C. Within 90 days
D. Only during maintenance
Answer: B. Within 30 days
Rationale: EPA requires repair within 30 days for significant leaks.
, 7. What is the leak rate threshold for comfort cooling appliances?
A. 10%
B. 15%
C. 20%
D. 30%
Answer: B. 15%
Rationale: Leak rate threshold is 15% annually for comfort cooling
systems.
8. Which device prevents refrigerant release during service?
A. Gauge manifold
B. Schrader valve
C. Low-loss fitting
D. Recovery tank
Answer: C. Low-loss fitting
Rationale: Low-loss fittings reduce refrigerant emissions during
connection/disconnection.
9. What color is a recovery cylinder?
A. Gray body, yellow top
B. Blue
C. Red
D. Green
Answer: A. Gray body, yellow top
Rationale: Standard color coding for recovery cylinders.
10.What happens if air enters a refrigeration system?
A. Increases efficiency
B. Decreases pressure
C. Raises head pressure
D. Lowers temperature
Answer: C. Raises head pressure
Rationale: Non-condensables increase system pressure and reduce
efficiency.
