LOW GWP REFRIGERANT SAFETY 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. Gas Working Pressure
C. General Waste Product
D. Green Water Protocol
Answer: A. Global Warming Potential
GWP measures how much heat a greenhouse gas traps in the atmosphere
compared to CO₂.
2. Which refrigerant has a very low GWP?
A. R-134a
B. R-410A
C. R-744
D. R-22
Answer: C. R-744
R-744 (CO₂) has a GWP of 1, making it one of the lowest possible.
3. Which classification indicates mildly flammable refrigerants?
A. A1
B. A2L
,C. B1
D. A3
Answer: B. A2L
A2L refrigerants are low toxicity and mildly flammable.
4. Which refrigerant is classified as A3?
A. R-32
B. R-1234yf
C. R-290
D. R-134a
Answer: C. R-290
R-290 (propane) is highly flammable and classified as A3.
5. What is the main safety concern with A3 refrigerants?
A. Toxicity
B. Flammability
C. Corrosion
D. Pressure
Answer: B. Flammability
A3 refrigerants are highly flammable and require strict handling precautions.
6. Which gas detector is required when working with flammable refrigerants?
A. Oxygen detector
B. Flame detector
C. Hydrocarbon detector
D. CO detector
,Answer: C. Hydrocarbon detector
Hydrocarbon detectors identify leaks of flammable refrigerants like propane.
7. What is the recommended action if a refrigerant leak is detected indoors?
A. Turn on lights
B. Ventilate immediately
C. Use a lighter
D. Ignore it
Answer: B. Ventilate immediately
Ventilation reduces concentration and prevents ignition risk.
8. Which refrigerant operates at very high pressure?
A. R-134a
B. R-22
C. R-744
D. R-1234yf
Answer: C. R-744
CO₂ systems operate at significantly higher pressures than traditional refrigerants.
9. What PPE is essential when handling refrigerants?
A. Gloves and goggles
B. Sandals
C. No protection
D. Cotton only
Answer: A. Gloves and goggles
Protective equipment prevents frostbite and eye injury.
, 10. Why must ignition sources be controlled when using A2L refrigerants?
A. They are toxic
B. They are explosive
C. They are mildly flammable
D. They are corrosive
Answer: C. They are mildly flammable
A2L refrigerants can ignite under certain conditions.
11. What is the safe storage condition for refrigerant cylinders?
A. Near heat sources
B. Upright and cool area
C. Lying flat in sun
D. In water
Answer: B. Upright and cool area
Prevents pressure buildup and leakage.
12. Which refrigerant is a natural refrigerant?
A. R-410A
B. R-134a
C. R-744
D. R-404A
Answer: C. R-744
CO₂ occurs naturally and has minimal environmental impact.
13. What is the first step before servicing a system?
A. Start compressor
B. Disconnect power
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. Gas Working Pressure
C. General Waste Product
D. Green Water Protocol
Answer: A. Global Warming Potential
GWP measures how much heat a greenhouse gas traps in the atmosphere
compared to CO₂.
2. Which refrigerant has a very low GWP?
A. R-134a
B. R-410A
C. R-744
D. R-22
Answer: C. R-744
R-744 (CO₂) has a GWP of 1, making it one of the lowest possible.
3. Which classification indicates mildly flammable refrigerants?
A. A1
B. A2L
,C. B1
D. A3
Answer: B. A2L
A2L refrigerants are low toxicity and mildly flammable.
4. Which refrigerant is classified as A3?
A. R-32
B. R-1234yf
C. R-290
D. R-134a
Answer: C. R-290
R-290 (propane) is highly flammable and classified as A3.
5. What is the main safety concern with A3 refrigerants?
A. Toxicity
B. Flammability
C. Corrosion
D. Pressure
Answer: B. Flammability
A3 refrigerants are highly flammable and require strict handling precautions.
6. Which gas detector is required when working with flammable refrigerants?
A. Oxygen detector
B. Flame detector
C. Hydrocarbon detector
D. CO detector
,Answer: C. Hydrocarbon detector
Hydrocarbon detectors identify leaks of flammable refrigerants like propane.
7. What is the recommended action if a refrigerant leak is detected indoors?
A. Turn on lights
B. Ventilate immediately
C. Use a lighter
D. Ignore it
Answer: B. Ventilate immediately
Ventilation reduces concentration and prevents ignition risk.
8. Which refrigerant operates at very high pressure?
A. R-134a
B. R-22
C. R-744
D. R-1234yf
Answer: C. R-744
CO₂ systems operate at significantly higher pressures than traditional refrigerants.
9. What PPE is essential when handling refrigerants?
A. Gloves and goggles
B. Sandals
C. No protection
D. Cotton only
Answer: A. Gloves and goggles
Protective equipment prevents frostbite and eye injury.
, 10. Why must ignition sources be controlled when using A2L refrigerants?
A. They are toxic
B. They are explosive
C. They are mildly flammable
D. They are corrosive
Answer: C. They are mildly flammable
A2L refrigerants can ignite under certain conditions.
11. What is the safe storage condition for refrigerant cylinders?
A. Near heat sources
B. Upright and cool area
C. Lying flat in sun
D. In water
Answer: B. Upright and cool area
Prevents pressure buildup and leakage.
12. Which refrigerant is a natural refrigerant?
A. R-410A
B. R-134a
C. R-744
D. R-404A
Answer: C. R-744
CO₂ occurs naturally and has minimal environmental impact.
13. What is the first step before servicing a system?
A. Start compressor
B. Disconnect power
