EPA Section 608 Core Exam Questions with
100% Verified Answers
How should refrigerant blends be charged? - ✔️✔️As a liquid
What unit does a compound pressure gauge for the low side of the system measure pressure
in? - ✔️✔️Psig and Inches of mercury ( in. Hg)
What process applies to cleaning refrigerant for immediate reuse by oil separation and single or
multiple passes through devices, like replaceable core filter driers, which reduce moisture and
acidity? - ✔️✔️Recycling
What leak detection method is considered to be the most efficient for locating the general area
of a small leak? - ✔️✔️Electronic or ultrasonic tester
What should a technician do if they discover that some R-410A was added to an R-22 system? -
✔️✔️Recover the mixture into a separate recovery tank
Which factor does NOT affect the speed of evacuation? - ✔️✔️a. The size of the equipment being
evacuated
b. The ambient temperature
c. The amount of moisture in the system
d. The brand of micron gauge used
** d. The brand of micron gauge used
, Which of the following is NO a recommended safety practice when operating refrigerant
recovery or recycling equipment? - ✔️✔️a. Wear safety glasses
b. Wear protective gloves
c. Follow all safety precautions for the equipment
d. Remain at least 5 feet away from the operating equipment.
** d. Remain at least 5 feet away from the operating equipment.
Refrigerant cylinders should be all of the following EXCEPT: - ✔️✔️a. be free of rust and damage
b. filled to 95% of capacity
c. be labeled
d. be secure
** b. filled to 95% of capacity
When transporting cylinders containing used refrigerant, DOT requires that you: - ✔️✔️Attach
DOT classification tags
How does the global warming potential of R-410A compare to that of carbon dioxide - ✔️✔️It is
thousands of times greater
How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441
compare to the GWPs of HFC 134a, R404a, and R-410A? - ✔️✔️They are significantly lower
What are the characteristics of hyrofluoroolefins (HFOs)? - ✔️✔️Non-ozone depleting, and have a
low global warming potential
100% Verified Answers
How should refrigerant blends be charged? - ✔️✔️As a liquid
What unit does a compound pressure gauge for the low side of the system measure pressure
in? - ✔️✔️Psig and Inches of mercury ( in. Hg)
What process applies to cleaning refrigerant for immediate reuse by oil separation and single or
multiple passes through devices, like replaceable core filter driers, which reduce moisture and
acidity? - ✔️✔️Recycling
What leak detection method is considered to be the most efficient for locating the general area
of a small leak? - ✔️✔️Electronic or ultrasonic tester
What should a technician do if they discover that some R-410A was added to an R-22 system? -
✔️✔️Recover the mixture into a separate recovery tank
Which factor does NOT affect the speed of evacuation? - ✔️✔️a. The size of the equipment being
evacuated
b. The ambient temperature
c. The amount of moisture in the system
d. The brand of micron gauge used
** d. The brand of micron gauge used
, Which of the following is NO a recommended safety practice when operating refrigerant
recovery or recycling equipment? - ✔️✔️a. Wear safety glasses
b. Wear protective gloves
c. Follow all safety precautions for the equipment
d. Remain at least 5 feet away from the operating equipment.
** d. Remain at least 5 feet away from the operating equipment.
Refrigerant cylinders should be all of the following EXCEPT: - ✔️✔️a. be free of rust and damage
b. filled to 95% of capacity
c. be labeled
d. be secure
** b. filled to 95% of capacity
When transporting cylinders containing used refrigerant, DOT requires that you: - ✔️✔️Attach
DOT classification tags
How does the global warming potential of R-410A compare to that of carbon dioxide - ✔️✔️It is
thousands of times greater
How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441
compare to the GWPs of HFC 134a, R404a, and R-410A? - ✔️✔️They are significantly lower
What are the characteristics of hyrofluoroolefins (HFOs)? - ✔️✔️Non-ozone depleting, and have a
low global warming potential
