LOW GWP QUIZ QUESTIONS CORRECTLY ANSWERED TO PASS!!
The min. concentration of a refrig that can propagate a flame through consistent mixture of the refrig.
and air is; - (answer)C - lower flammability limit (LFL).
2 - Refrigerant cylinders should be transported in the upright position to ensure; - (answer)C - Pressure
relief valve
3 - Tools used during the installation or service of systems charged with a flammable refrigerant must
be; - (answer)D - rated for use with flammable refrigerants
4 - The first stage of the evacuation process which removes non-condensables from a system is called; -
(answer)A - Degassing
5 - Once a flammable refrigerant has been recovered and stored in a recovery cylinder; - (answer)B -
Safe Distances
6 - In a vapor-compression refrigeration circuit the term condensable is used to describe; - (answer)B -
any gas that will not condense to a liquid
7 - Which of the following can affect the speed and efficiency of an evacuation? - (answer)A - The
capacity of the vacuum pump and hoses being used.
8 - Which of the following refrigerants is exempt from the EPA's recovery mandate? - (answer)B - R-290
Which one of the following refrigerants is classified as an A3 refrigerant? - (answer)B - R-290
10 - Atmospheric pressure (0 psig) is equal to approximately; - (answer)D - 760,000 Microns
11 - To avoid fractionation, blended refrigerants should be; - (answer)A - charged as a liquid
12 - An uppercase letter designation
, LOW GWP QUIZ QUESTIONS CORRECTLY ANSWERED TO PASS!!
(R-407A, R-407B, R-407C) is used when refrigerant blends are; - (answer)D - An uppercase letter
designation
(R-407A, R-407B, R-407C) is used when refrigerant blends are;
13 - Flammable refrigerant cylinders must have a; - (answer)D - red band on the top of the container.
14 - During the brazing process; - (answer)A - a low-pressure purge with an inert gas, such as nitrogen,
should be used.
15 - Which of the following refrigerant safety classifications is most hazardous in terms of flammability
and toxicity? - (answer)D - B3
16 - Which of the following refrigerants has the lowest global warming potential (GWP)? - (answer)B - R-
290
17 - Which of the following should be done prior to beginning the recovery process? - (answer)C - Purge
air from the refrigerant hoses to prevent refrigerant contamination.
18 - When the manufacturer's literature is not available, the industry-accepted evacuation level for most
HVACR equipment is; - (answer)C - 500 Microns
19 - When working with A2L refrigerants, which one of the following is not an approved leak detection
method? - (answer)B - Halide Leak Detector
20 - When brazing a system that has been charged with an A2 refrigerant; - (answer)D - system should
be swept with nitrogen to ensure there is no residual refrig.
21 - Refrigerants that have a lowercase letter designation, such as- R-134a indicate a(n); - (answer)B -
Isomer
The min. concentration of a refrig that can propagate a flame through consistent mixture of the refrig.
and air is; - (answer)C - lower flammability limit (LFL).
2 - Refrigerant cylinders should be transported in the upright position to ensure; - (answer)C - Pressure
relief valve
3 - Tools used during the installation or service of systems charged with a flammable refrigerant must
be; - (answer)D - rated for use with flammable refrigerants
4 - The first stage of the evacuation process which removes non-condensables from a system is called; -
(answer)A - Degassing
5 - Once a flammable refrigerant has been recovered and stored in a recovery cylinder; - (answer)B -
Safe Distances
6 - In a vapor-compression refrigeration circuit the term condensable is used to describe; - (answer)B -
any gas that will not condense to a liquid
7 - Which of the following can affect the speed and efficiency of an evacuation? - (answer)A - The
capacity of the vacuum pump and hoses being used.
8 - Which of the following refrigerants is exempt from the EPA's recovery mandate? - (answer)B - R-290
Which one of the following refrigerants is classified as an A3 refrigerant? - (answer)B - R-290
10 - Atmospheric pressure (0 psig) is equal to approximately; - (answer)D - 760,000 Microns
11 - To avoid fractionation, blended refrigerants should be; - (answer)A - charged as a liquid
12 - An uppercase letter designation
, LOW GWP QUIZ QUESTIONS CORRECTLY ANSWERED TO PASS!!
(R-407A, R-407B, R-407C) is used when refrigerant blends are; - (answer)D - An uppercase letter
designation
(R-407A, R-407B, R-407C) is used when refrigerant blends are;
13 - Flammable refrigerant cylinders must have a; - (answer)D - red band on the top of the container.
14 - During the brazing process; - (answer)A - a low-pressure purge with an inert gas, such as nitrogen,
should be used.
15 - Which of the following refrigerant safety classifications is most hazardous in terms of flammability
and toxicity? - (answer)D - B3
16 - Which of the following refrigerants has the lowest global warming potential (GWP)? - (answer)B - R-
290
17 - Which of the following should be done prior to beginning the recovery process? - (answer)C - Purge
air from the refrigerant hoses to prevent refrigerant contamination.
18 - When the manufacturer's literature is not available, the industry-accepted evacuation level for most
HVACR equipment is; - (answer)C - 500 Microns
19 - When working with A2L refrigerants, which one of the following is not an approved leak detection
method? - (answer)B - Halide Leak Detector
20 - When brazing a system that has been charged with an A2 refrigerant; - (answer)D - system should
be swept with nitrogen to ensure there is no residual refrig.
21 - Refrigerants that have a lowercase letter designation, such as- R-134a indicate a(n); - (answer)B -
Isomer
