Low GWP- Test Questions With
Correct Answers.
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;
Correct Answers.
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;
