Low GWP Refrigerants HVACR Quiz
Practice Material 2026/2027 Complete
Questions and Answers
Introduction:
This document contains a comprehensive set of quiz questions and
verified answers focused on low global warming potential (GWP)
refrigerants and HVACR safety practices. It covers topics such as
A2L and A3 refrigerants, EPA regulations, recovery procedures,
flammability limits, and installation standards.
The material is suitable for exam preparation, especially for EPA
Section 608 certification and modern refrigerant handling
requirements. It includes repeated questions for reinforcement and
covers both theoretical concepts and practical safety guidelines.
Exam Questions and Verified Answers:
1. When working with A2L refrigerants, which is not an
approved leak detection method?---Correct precise answer---Halide
leak detector
2. DOT regulations require refrigerant cylinders containing over
2.2 lbs of a 2L refrigerant to equipped with---Correct precise
answer---pressure relief valve
3. Which of the following refrigerants is exempt from the EPS's
recovery man- date?---Correct precise answer---R-290
,4. Which of the following refrigerant safety classifications is
most hazardous in terms of flammability and toxicity?---Correct
precise answer---B3
5. Which of the following refrigerants has the lowest global
warming potential (GWP)?---Correct precise answer---R-290
6. The rate a which a flame front spreads relative to the
unburned gas ahead of the flame is called the---Correct precise
answer---burning velocity
7. EPA Section 608 regulations require that if a system is
charged with a flam- mable refrigerant, the equipment must have---
Correct precise answer---red markings on service valves and tubing
8. Which of the following must be recorded on the label of A2L
equipment upon completion of a system installation?---Correct
precise answer---date that the pressure test and the evacuation
were completed
9. Which of the following is classified as an A2L refrigerant?---
Correct precise answer---R-1234yf
10. An uppercase letter designation (R-407A, R-407B, R-407C) is
used when refrigerant blends are---Correct precise answer---
composed of the same refrigerants but with ditterent percentages
of each
11. Refrigerant Piping for an A2L system that is installed inside of
a wall of floorspace, where it passes through joists or studs, must
be---Correct precise answer---protected by a stride plate or
shielding
, 12. Which of the following refrigerants is an HFO?---Correct
precise answer---R-1234yf
13. Which one of the following refrigerants is classified as an A3
refrigerant?---Correct precise answer----R-290
14. Refrigerant cylinders should be transported in the upright
position to en- sure---Correct precise answer---the pressure relief
valve is in contact with the vapor space in the cylinder
15. The EPA program that evaluates and approves substitute
refrigerants for use is---Correct precise answer---SNAP
16. Upon completion of an A2L system installation---Correct
precise answer---a permanent label must be placed on the system
to show required service dates
17. Which of the following is/are used to determine the maximum
concentration of refrigerant allowed in an occupied space?---
Correct precise answer---Refrigerant Concentration Limits (RCL)
18. When a technician is disposing of a piece of equipment that
was charged with a flammable refrigerant, it must have a label
affixed to it which states---Correct precise answer---the date that
equipment was decommissioned and the refrigerant was recovered
19. The first stage of the evacuation process which removes non-
condensables from a system is called---Correct precise answer---
degassing
20. To reduce the chances of a possible ignition source from being
introduced into the work area of a flammable refrigerant system---
Correct precise answer---designate a safe perimeter around the
work area
Practice Material 2026/2027 Complete
Questions and Answers
Introduction:
This document contains a comprehensive set of quiz questions and
verified answers focused on low global warming potential (GWP)
refrigerants and HVACR safety practices. It covers topics such as
A2L and A3 refrigerants, EPA regulations, recovery procedures,
flammability limits, and installation standards.
The material is suitable for exam preparation, especially for EPA
Section 608 certification and modern refrigerant handling
requirements. It includes repeated questions for reinforcement and
covers both theoretical concepts and practical safety guidelines.
Exam Questions and Verified Answers:
1. When working with A2L refrigerants, which is not an
approved leak detection method?---Correct precise answer---Halide
leak detector
2. DOT regulations require refrigerant cylinders containing over
2.2 lbs of a 2L refrigerant to equipped with---Correct precise
answer---pressure relief valve
3. Which of the following refrigerants is exempt from the EPS's
recovery man- date?---Correct precise answer---R-290
,4. Which of the following refrigerant safety classifications is
most hazardous in terms of flammability and toxicity?---Correct
precise answer---B3
5. Which of the following refrigerants has the lowest global
warming potential (GWP)?---Correct precise answer---R-290
6. The rate a which a flame front spreads relative to the
unburned gas ahead of the flame is called the---Correct precise
answer---burning velocity
7. EPA Section 608 regulations require that if a system is
charged with a flam- mable refrigerant, the equipment must have---
Correct precise answer---red markings on service valves and tubing
8. Which of the following must be recorded on the label of A2L
equipment upon completion of a system installation?---Correct
precise answer---date that the pressure test and the evacuation
were completed
9. Which of the following is classified as an A2L refrigerant?---
Correct precise answer---R-1234yf
10. An uppercase letter designation (R-407A, R-407B, R-407C) is
used when refrigerant blends are---Correct precise answer---
composed of the same refrigerants but with ditterent percentages
of each
11. Refrigerant Piping for an A2L system that is installed inside of
a wall of floorspace, where it passes through joists or studs, must
be---Correct precise answer---protected by a stride plate or
shielding
, 12. Which of the following refrigerants is an HFO?---Correct
precise answer---R-1234yf
13. Which one of the following refrigerants is classified as an A3
refrigerant?---Correct precise answer----R-290
14. Refrigerant cylinders should be transported in the upright
position to en- sure---Correct precise answer---the pressure relief
valve is in contact with the vapor space in the cylinder
15. The EPA program that evaluates and approves substitute
refrigerants for use is---Correct precise answer---SNAP
16. Upon completion of an A2L system installation---Correct
precise answer---a permanent label must be placed on the system
to show required service dates
17. Which of the following is/are used to determine the maximum
concentration of refrigerant allowed in an occupied space?---
Correct precise answer---Refrigerant Concentration Limits (RCL)
18. When a technician is disposing of a piece of equipment that
was charged with a flammable refrigerant, it must have a label
affixed to it which states---Correct precise answer---the date that
equipment was decommissioned and the refrigerant was recovered
19. The first stage of the evacuation process which removes non-
condensables from a system is called---Correct precise answer---
degassing
20. To reduce the chances of a possible ignition source from being
introduced into the work area of a flammable refrigerant system---
Correct precise answer---designate a safe perimeter around the
work area
