Low GwP Quiz QuESTioNS wiTH DETAiLED VERiFiED
ANSwERS (100% CoRRECT ANSwERS) /ALREADY
GRADED A +.
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
(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
ANSwERS (100% CoRRECT ANSwERS) /ALREADY
GRADED A +.
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
(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
