LOW GWP REFRIGERANT EXAM LATEST 2026
UPDATE 100 QUESTIONS AND DETAILED VERIFIED
ANSWERS FROM ACTUAL EXAMS TEST GRADE A+
1. What does GWP stand for?
A. Global Warming Potential
B. Greenhouse Water Pressure
C. Gas Weight Parameter
D. Global Warming Process
Answer: A. Global Warming Potential
GWP measures how much heat a greenhouse gas traps in the atmosphere
compared to CO₂.
2. Which refrigerant has the lowest GWP?
A. R-410A
B. R-134a
C. R-744
D. R-22
Answer: C. R-744
R-744 (CO₂) has a GWP of 1, making it the baseline and lowest.
3. Which refrigerant is classified as A2L?
A. R-22
B. R-134a
,C. R-32
D. R-744
Answer: C. R-32
A2L refrigerants are mildly flammable with low toxicity.
4. What does the “A” in A2L signify?
A. High toxicity
B. Low toxicity
C. Non-toxic
D. Moderate toxicity
Answer: B. Low toxicity
ASHRAE classification “A” indicates lower toxicity.
5. Which refrigerant is considered natural?
A. R-410A
B. R-1234yf
C. Ammonia
D. R-134a
Answer: C. Ammonia
Natural refrigerants occur in nature and include ammonia, CO₂, and hydrocarbons.
6. What is the GWP of CO₂?
A. 0
B. 1
C. 10
D. 100
,Answer: B. 1
CO₂ is the reference gas for GWP comparisons.
7. Which refrigerant is highly flammable (A3)?
A. R-32
B. R-744
C. Propane (R-290)
D. R-134a
Answer: C. Propane (R-290)
A3 refrigerants are highly flammable.
8. Which refrigerant replaced R-134a in many vehicles?
A. R-410A
B. R-1234yf
C. R-32
D. R-744
Answer: B. R-1234yf
R-1234yf has a much lower GWP than R-134a.
9. What is the primary goal of using low GWP refrigerants?
A. Increase pressure
B. Reduce cost
C. Reduce environmental impact
D. Improve cooling speed
Answer: C. Reduce environmental impact
Low GWP refrigerants help mitigate climate change.
, 10. Which refrigerant has zero ODP?
A. R-22
B. R-12
C. R-134a
D. All of the above
Answer: C. R-134a
R-134a has zero ozone depletion potential.
11. What does ODP stand for?
A. Ozone Depletion Potential
B. Oxygen Density Pressure
C. Operational Design Parameter
D. Ozone Distribution Process
Answer: A. Ozone Depletion Potential
ODP measures a substance’s impact on the ozone layer.
12. Which safety group is non-flammable?
A. A3
B. A2L
C. A1
D. B2
Answer: C. A1
A1 refrigerants are non-toxic and non-flammable.
13. Which refrigerant is commonly used in CO₂ systems?
A. R-744
B. R-410A
UPDATE 100 QUESTIONS AND DETAILED VERIFIED
ANSWERS FROM ACTUAL EXAMS TEST GRADE A+
1. What does GWP stand for?
A. Global Warming Potential
B. Greenhouse Water Pressure
C. Gas Weight Parameter
D. Global Warming Process
Answer: A. Global Warming Potential
GWP measures how much heat a greenhouse gas traps in the atmosphere
compared to CO₂.
2. Which refrigerant has the lowest GWP?
A. R-410A
B. R-134a
C. R-744
D. R-22
Answer: C. R-744
R-744 (CO₂) has a GWP of 1, making it the baseline and lowest.
3. Which refrigerant is classified as A2L?
A. R-22
B. R-134a
,C. R-32
D. R-744
Answer: C. R-32
A2L refrigerants are mildly flammable with low toxicity.
4. What does the “A” in A2L signify?
A. High toxicity
B. Low toxicity
C. Non-toxic
D. Moderate toxicity
Answer: B. Low toxicity
ASHRAE classification “A” indicates lower toxicity.
5. Which refrigerant is considered natural?
A. R-410A
B. R-1234yf
C. Ammonia
D. R-134a
Answer: C. Ammonia
Natural refrigerants occur in nature and include ammonia, CO₂, and hydrocarbons.
6. What is the GWP of CO₂?
A. 0
B. 1
C. 10
D. 100
,Answer: B. 1
CO₂ is the reference gas for GWP comparisons.
7. Which refrigerant is highly flammable (A3)?
A. R-32
B. R-744
C. Propane (R-290)
D. R-134a
Answer: C. Propane (R-290)
A3 refrigerants are highly flammable.
8. Which refrigerant replaced R-134a in many vehicles?
A. R-410A
B. R-1234yf
C. R-32
D. R-744
Answer: B. R-1234yf
R-1234yf has a much lower GWP than R-134a.
9. What is the primary goal of using low GWP refrigerants?
A. Increase pressure
B. Reduce cost
C. Reduce environmental impact
D. Improve cooling speed
Answer: C. Reduce environmental impact
Low GWP refrigerants help mitigate climate change.
, 10. Which refrigerant has zero ODP?
A. R-22
B. R-12
C. R-134a
D. All of the above
Answer: C. R-134a
R-134a has zero ozone depletion potential.
11. What does ODP stand for?
A. Ozone Depletion Potential
B. Oxygen Density Pressure
C. Operational Design Parameter
D. Ozone Distribution Process
Answer: A. Ozone Depletion Potential
ODP measures a substance’s impact on the ozone layer.
12. Which safety group is non-flammable?
A. A3
B. A2L
C. A1
D. B2
Answer: C. A1
A1 refrigerants are non-toxic and non-flammable.
13. Which refrigerant is commonly used in CO₂ systems?
A. R-744
B. R-410A
