SKILLCAT EPA 608
SkillCat EPA 608 Exam Actual Questions & Correct Answers |
2026 Updated Study Guide with Rationales | Universal HVAC
Certification Prep
Gradegurus
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,Page 1
Question 1
Other than fluorine and chlorine, what do HCFCs contain? (Select all that apply)
A. Hydrogen
B. Carbon
C. Helium
D. Calcium
Correct Answer: A and B
Rationale: HCFCs (Hydrochlorofluorocarbons) contain Hydrogen, Chlorine, Fluorine, and
Carbon atoms. Helium and Calcium are not components of refrigerant molecules. The
"H" in HCFC stands for Hydrogen, and "C" stands for Carbon.
Question 2
Which of the following is needed to protect your hands from refrigerant burns?
A. Cotton gloves
B. Butyl-lined gloves
C. Triple layered gloves
D. Any of the above
E. Refrigerant pressure
Correct Answer: Butyl-lined gloves
Rationale: Butyl-lined gloves provide the necessary chemical resistance to protect
against refrigerant burns and frostbite. Liquid refrigerant can cause severe frostbite
upon skin contact, and butyl rubber offers excellent protection against refrigerant
exposure. Cotton gloves absorb liquid refrigerant and can actually increase the risk of
frostbite.
,Page 2
Question 3
Which of the following is not true?
A. SNAP lists acceptable substitutes for phased out refrigerants for different categories
of end-uses
B. SNAP is implemented by the EPA
C. Refrigerants can be classified as unacceptable under SNAP
D. None of these
Correct Answer: None of these
Rationale: All statements A, B, and C are true about SNAP (Significant New Alternatives
Policy). The EPA implements SNAP to evaluate and regulate substitutes for ozone-
depleting substances. Refrigerants can indeed be classified as acceptable, acceptable
with use conditions, or unacceptable under SNAP.
Question 4
If the oil is contaminated, what do we have to do?
A. Flush the system
B. Flush the compressor
C. Flush the recovery device
D. All of these
Correct Answer: All of these
Rationale: Contaminated oil can spread throughout the entire system. When
contamination occurs, all components that came into contact with the contaminated oil
must be flushed - including the system, compressor, and recovery equipment - to
prevent cross-contamination and ensure proper operation.
, Page 3
Question 5
R-1234yf is the same as:
A. CFC-1234yf
B. HCFC-1234yf
C. HFC-1234yf
D. HFO-1234yf
Correct Answer: HFO-1234yf
Rationale: R-1234yf is a Hydrofluoroolefin (HFO) refrigerant. The "yf" designation
indicates it's an HFO, which is a newer class of refrigerants with very low GWP. It does
not contain chlorine (so it's not a CFC or HCFC) and is chemically different from HFCs.
Question 6
If a humidifier has 90 ounces of R-32, it is considered a Type I appliance under Section
608.
Select one: True / False
Correct Answer: False
Rationale: Type I appliances contain 5 pounds (80 ounces) or less of refrigerant. Since
90 ounces is more than 80 ounces (5 pounds), this appliance would not be classified as
Type I. It would fall under Type II or Type III classification depending on the system type.
Page 4
Question 7
If we have two HFC refrigerants, we can use the same recovery cylinder because they
are the same type of refrigerant.
SkillCat EPA 608 Exam Actual Questions & Correct Answers |
2026 Updated Study Guide with Rationales | Universal HVAC
Certification Prep
Gradegurus
➢
➢
➢
➢
,Page 1
Question 1
Other than fluorine and chlorine, what do HCFCs contain? (Select all that apply)
A. Hydrogen
B. Carbon
C. Helium
D. Calcium
Correct Answer: A and B
Rationale: HCFCs (Hydrochlorofluorocarbons) contain Hydrogen, Chlorine, Fluorine, and
Carbon atoms. Helium and Calcium are not components of refrigerant molecules. The
"H" in HCFC stands for Hydrogen, and "C" stands for Carbon.
Question 2
Which of the following is needed to protect your hands from refrigerant burns?
A. Cotton gloves
B. Butyl-lined gloves
C. Triple layered gloves
D. Any of the above
E. Refrigerant pressure
Correct Answer: Butyl-lined gloves
Rationale: Butyl-lined gloves provide the necessary chemical resistance to protect
against refrigerant burns and frostbite. Liquid refrigerant can cause severe frostbite
upon skin contact, and butyl rubber offers excellent protection against refrigerant
exposure. Cotton gloves absorb liquid refrigerant and can actually increase the risk of
frostbite.
,Page 2
Question 3
Which of the following is not true?
A. SNAP lists acceptable substitutes for phased out refrigerants for different categories
of end-uses
B. SNAP is implemented by the EPA
C. Refrigerants can be classified as unacceptable under SNAP
D. None of these
Correct Answer: None of these
Rationale: All statements A, B, and C are true about SNAP (Significant New Alternatives
Policy). The EPA implements SNAP to evaluate and regulate substitutes for ozone-
depleting substances. Refrigerants can indeed be classified as acceptable, acceptable
with use conditions, or unacceptable under SNAP.
Question 4
If the oil is contaminated, what do we have to do?
A. Flush the system
B. Flush the compressor
C. Flush the recovery device
D. All of these
Correct Answer: All of these
Rationale: Contaminated oil can spread throughout the entire system. When
contamination occurs, all components that came into contact with the contaminated oil
must be flushed - including the system, compressor, and recovery equipment - to
prevent cross-contamination and ensure proper operation.
, Page 3
Question 5
R-1234yf is the same as:
A. CFC-1234yf
B. HCFC-1234yf
C. HFC-1234yf
D. HFO-1234yf
Correct Answer: HFO-1234yf
Rationale: R-1234yf is a Hydrofluoroolefin (HFO) refrigerant. The "yf" designation
indicates it's an HFO, which is a newer class of refrigerants with very low GWP. It does
not contain chlorine (so it's not a CFC or HCFC) and is chemically different from HFCs.
Question 6
If a humidifier has 90 ounces of R-32, it is considered a Type I appliance under Section
608.
Select one: True / False
Correct Answer: False
Rationale: Type I appliances contain 5 pounds (80 ounces) or less of refrigerant. Since
90 ounces is more than 80 ounces (5 pounds), this appliance would not be classified as
Type I. It would fall under Type II or Type III classification depending on the system type.
Page 4
Question 7
If we have two HFC refrigerants, we can use the same recovery cylinder because they
are the same type of refrigerant.
