LOW GWP QUESTIONS WITH ACCURATE ANSWERS
2 - Refrigerant cylinders should be transported in the upright position to ensure;
correct answer C - Pressure relief valve
3 - Tools used during the installation or service of systems charged with a
flammable refrigerant must be; correct 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; correct answer A - Degassing
5 - Once a flammable refrigerant has been recovered and stored in a recovery
cylinder; correct answer B - Safe Distances
6 - In a vapor-compression refrigeration circuit the term condensable is used to
describe; correct 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?
correct 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? correct answer B - R-290
10 - Atmospheric pressure (0 psig) is equal to approximately; correct answer D -
760,000 Microns
, 11 - To avoid fractionation, blended refrigerants should be; correct answer A -
charged as a liquid
12 - An uppercase letter designation
(R-407A, R-407B, R-407C) is used when refrigerant blends are; correct 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; correct answer D - red band on
the top of the container.
14 - During the brazing process; correct 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? correct answer D - B3
16 - Which of the following refrigerants has the lowest global warming potential
(GWP)? correct answer B - R-290
17 - Which of the following should be done prior to beginning the recovery
process? correct 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; correct answer C - 500 Microns
2 - Refrigerant cylinders should be transported in the upright position to ensure;
correct answer C - Pressure relief valve
3 - Tools used during the installation or service of systems charged with a
flammable refrigerant must be; correct 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; correct answer A - Degassing
5 - Once a flammable refrigerant has been recovered and stored in a recovery
cylinder; correct answer B - Safe Distances
6 - In a vapor-compression refrigeration circuit the term condensable is used to
describe; correct 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?
correct 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? correct answer B - R-290
10 - Atmospheric pressure (0 psig) is equal to approximately; correct answer D -
760,000 Microns
, 11 - To avoid fractionation, blended refrigerants should be; correct answer A -
charged as a liquid
12 - An uppercase letter designation
(R-407A, R-407B, R-407C) is used when refrigerant blends are; correct 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; correct answer D - red band on
the top of the container.
14 - During the brazing process; correct 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? correct answer D - B3
16 - Which of the following refrigerants has the lowest global warming potential
(GWP)? correct answer B - R-290
17 - Which of the following should be done prior to beginning the recovery
process? correct 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; correct answer C - 500 Microns
