Low GWP Refrigerant
1. The minimum concentration of a refriger- Lower Flammability Limit (LFL)
ant that can propagate a flame through a
consistent mixture of the refrigerant and
air is known as the:
2. The first stage of evacuation process Recovery
which removes non-condensables from a
system is called:
3. Once a flammable refrigerant has been It must be placed a safe distance away from
recovered and stored in a cylinder: the work area before a system repair or instal-
lation is started
4. Which of the following refrigerants is ex- R-290
empt from the EPA's recovery mandate:
5. Which of the following refrigerants is clas- R-290
sified as an A3 refrigerant:
6. Flammable refrigerant cylinders must Red band at the top of the container
have:
7. Which of the following should be done Purge air from the refrigerant hoses to pre-
prior to beginning the recovery process: vent refrigerant contamination
8. When working with A2L refrigerants, Halide Leak Detector
which of the following is not an approved
leak detection method:
9. When brazing a system that has been The system should be swept with nitrogen to
charged with an A2L refrigerant: ensure that there is no residual refrigerant
10. Refrigerants that have a lowercase desig- Isomer
nation, such as R-134, indicates a:
1/6
, Low GWP Refrigerant
11. Which of the following is classified as an R-1234yf
A2L refrigerant:
12. When using a flammable refrigerant as a 25% of the lower flammability limit (LFL) of
trace gas for a leak detection, the amount the refrigerant
must not exceed:
13. Hydrogen Fluoride (HF) can form when: Any fluoride containing refrigerant under-
goes complete of incomplete combustion or
thermal decomposition
14. Which of the following must be recorded Date that the pressure test and evacuation is
on the label of A2L equipment upon the completed
completion of a system installation:
15. EPA Section 608 regulations require that Red markings on the service valves and tubing
if a system is charged with a flammable
refrigerant, the equipment must have:
16. What is used to determine the maximum Refrigerant Concentration Limit (RCL)
concentration of a refrigerant allowed in
an occupied space:
17. DOT regulations require refrigerant cylin- Pressure Relief Valve
ders over 2.2 pounds of a 2L refrigerant to
be equipped with:
18. The rate at which a flame front spreads Burning Velocity
relative to the unburned gas ahead of the
flame is called the:
19. Factors used to determine the maximum The cubic feet air space served by the equip-
allowable charge of an A2L system: ment
2/6
1. The minimum concentration of a refriger- Lower Flammability Limit (LFL)
ant that can propagate a flame through a
consistent mixture of the refrigerant and
air is known as the:
2. The first stage of evacuation process Recovery
which removes non-condensables from a
system is called:
3. Once a flammable refrigerant has been It must be placed a safe distance away from
recovered and stored in a cylinder: the work area before a system repair or instal-
lation is started
4. Which of the following refrigerants is ex- R-290
empt from the EPA's recovery mandate:
5. Which of the following refrigerants is clas- R-290
sified as an A3 refrigerant:
6. Flammable refrigerant cylinders must Red band at the top of the container
have:
7. Which of the following should be done Purge air from the refrigerant hoses to pre-
prior to beginning the recovery process: vent refrigerant contamination
8. When working with A2L refrigerants, Halide Leak Detector
which of the following is not an approved
leak detection method:
9. When brazing a system that has been The system should be swept with nitrogen to
charged with an A2L refrigerant: ensure that there is no residual refrigerant
10. Refrigerants that have a lowercase desig- Isomer
nation, such as R-134, indicates a:
1/6
, Low GWP Refrigerant
11. Which of the following is classified as an R-1234yf
A2L refrigerant:
12. When using a flammable refrigerant as a 25% of the lower flammability limit (LFL) of
trace gas for a leak detection, the amount the refrigerant
must not exceed:
13. Hydrogen Fluoride (HF) can form when: Any fluoride containing refrigerant under-
goes complete of incomplete combustion or
thermal decomposition
14. Which of the following must be recorded Date that the pressure test and evacuation is
on the label of A2L equipment upon the completed
completion of a system installation:
15. EPA Section 608 regulations require that Red markings on the service valves and tubing
if a system is charged with a flammable
refrigerant, the equipment must have:
16. What is used to determine the maximum Refrigerant Concentration Limit (RCL)
concentration of a refrigerant allowed in
an occupied space:
17. DOT regulations require refrigerant cylin- Pressure Relief Valve
ders over 2.2 pounds of a 2L refrigerant to
be equipped with:
18. The rate at which a flame front spreads Burning Velocity
relative to the unburned gas ahead of the
flame is called the:
19. Factors used to determine the maximum The cubic feet air space served by the equip-
allowable charge of an A2L system: ment
2/6
