CFESA Refrigeration Certification Exam
2026/2027 | 200+ Practice Questions, Correct
Answers & Detailed Rationales
1. Which refrigerant is prohibited from being vented to the atmosphere under EPA Section 608?
A) R-134a
B) R-22
C) R-410A
D) R-404A
Answer: B
Rationale: Venting ozone-depleting refrigerants such as R-22 is illegal. Recovery is required.
2. What PPE is required when handling liquid refrigerant?
A) Safety glasses only
B) Gloves, safety glasses, and face shield
C) Apron only
D) No PPE if careful
Answer: B
Rationale: Liquid refrigerant can cause frostbite and eye injury. Full face and hand protection are
required.
3. The EPA Section 608 certification is required for technicians who:
A) Only change filters
B) Service, maintain, or dispose of appliances containing regulated refrigerants
C) Only install insulation
,D) Only clean coils
Answer: B
Rationale: Section 608 covers refrigerant handling, recovery, and service practices.
4. Which refrigerant has the highest global warming potential (GWP)?
A) R-134a
B) R-404A
C) R-290
D) R-744 (CO₂)
Answer: B
Rationale: R-404A has a very high GWP compared to R-134a, R-290, and CO₂.
5. A refrigerant cylinder should be stored:
A) Lying on its side
B) Upright and secured
C) In direct sunlight
D) Near open flame
Answer: B
Rationale: Upright storage prevents liquid refrigerant from entering the valve and reduces accident risk.
6. Which color cylinder typically indicates R-410A?
A) Green
B) Pink
C) Orange
D) White
Answer: B
Rationale: R-410A cylinders are commonly pink, though always verify labeling.
,7. What is the maximum allowable leak rate for commercial refrigeration equipment under EPA?
A) 5%
B) 20% for commercial refrigeration
C) 35% for industrial process
D) No limit
Answer: B
Rationale: EPA requires repair if leak rate exceeds 20% for commercial refrigeration.
8. When recovering refrigerant, the recovery cylinder should be:
A) Overfilled to 100%
B) Filled to no more than 80% capacity
C) Filled to 90%
D) Filled until liquid comes out
Answer: B
Rationale: Overfilling can cause hydraulic pressure and cylinder rupture. 80% is the safe limit.
9. Which tool is used to detect refrigerant leaks?
A) Vacuum gauge
B) Electronic leak detector
C) Multimeter
D) Clamp meter
Answer: B
Rationale: Electronic leak detectors sense halogenated refrigerants. Soap bubbles can also be used.
10. A refrigerant is considered reclaimed when:
A) It is recovered and reused in same system
B) It is processed to meet AHRI 700 purity standards
, C) It is vented
D) It is mixed with new refrigerant
Answer: B
Rationale: Reclaimed refrigerant must meet AHRI 700 for purity and composition.
11. Which law requires technicians to be certified to purchase refrigerant?
A) OSHA
B) Clean Air Act Section 608
C) ADA
D) NEC
Answer: B
Rationale: Section 608 of the Clean Air Act regulates refrigerant handling and certification.
12. What is the boiling point of R-22 at atmospheric pressure?
A) −10°F
B) −41°F
C) 0°F
D) −100°F
Answer: B
Rationale: R-22 boils at approximately −41°F at atmospheric pressure.
13. Which refrigerant is a zeotropic blend?
A) R-22
B) R-404A
C) R-134a
D) R-12
Answer: B
Rationale: R-404A is a zeotropic blend and must be charged as liquid.
2026/2027 | 200+ Practice Questions, Correct
Answers & Detailed Rationales
1. Which refrigerant is prohibited from being vented to the atmosphere under EPA Section 608?
A) R-134a
B) R-22
C) R-410A
D) R-404A
Answer: B
Rationale: Venting ozone-depleting refrigerants such as R-22 is illegal. Recovery is required.
2. What PPE is required when handling liquid refrigerant?
A) Safety glasses only
B) Gloves, safety glasses, and face shield
C) Apron only
D) No PPE if careful
Answer: B
Rationale: Liquid refrigerant can cause frostbite and eye injury. Full face and hand protection are
required.
3. The EPA Section 608 certification is required for technicians who:
A) Only change filters
B) Service, maintain, or dispose of appliances containing regulated refrigerants
C) Only install insulation
,D) Only clean coils
Answer: B
Rationale: Section 608 covers refrigerant handling, recovery, and service practices.
4. Which refrigerant has the highest global warming potential (GWP)?
A) R-134a
B) R-404A
C) R-290
D) R-744 (CO₂)
Answer: B
Rationale: R-404A has a very high GWP compared to R-134a, R-290, and CO₂.
5. A refrigerant cylinder should be stored:
A) Lying on its side
B) Upright and secured
C) In direct sunlight
D) Near open flame
Answer: B
Rationale: Upright storage prevents liquid refrigerant from entering the valve and reduces accident risk.
6. Which color cylinder typically indicates R-410A?
A) Green
B) Pink
C) Orange
D) White
Answer: B
Rationale: R-410A cylinders are commonly pink, though always verify labeling.
,7. What is the maximum allowable leak rate for commercial refrigeration equipment under EPA?
A) 5%
B) 20% for commercial refrigeration
C) 35% for industrial process
D) No limit
Answer: B
Rationale: EPA requires repair if leak rate exceeds 20% for commercial refrigeration.
8. When recovering refrigerant, the recovery cylinder should be:
A) Overfilled to 100%
B) Filled to no more than 80% capacity
C) Filled to 90%
D) Filled until liquid comes out
Answer: B
Rationale: Overfilling can cause hydraulic pressure and cylinder rupture. 80% is the safe limit.
9. Which tool is used to detect refrigerant leaks?
A) Vacuum gauge
B) Electronic leak detector
C) Multimeter
D) Clamp meter
Answer: B
Rationale: Electronic leak detectors sense halogenated refrigerants. Soap bubbles can also be used.
10. A refrigerant is considered reclaimed when:
A) It is recovered and reused in same system
B) It is processed to meet AHRI 700 purity standards
, C) It is vented
D) It is mixed with new refrigerant
Answer: B
Rationale: Reclaimed refrigerant must meet AHRI 700 for purity and composition.
11. Which law requires technicians to be certified to purchase refrigerant?
A) OSHA
B) Clean Air Act Section 608
C) ADA
D) NEC
Answer: B
Rationale: Section 608 of the Clean Air Act regulates refrigerant handling and certification.
12. What is the boiling point of R-22 at atmospheric pressure?
A) −10°F
B) −41°F
C) 0°F
D) −100°F
Answer: B
Rationale: R-22 boils at approximately −41°F at atmospheric pressure.
13. Which refrigerant is a zeotropic blend?
A) R-22
B) R-404A
C) R-134a
D) R-12
Answer: B
Rationale: R-404A is a zeotropic blend and must be charged as liquid.
