EPA SECTION 608 TYPE II
LATEST UPDATE 2026 EXAM
QUESTIONS AND ANSWERS
When first inspecting a hermetic system known to be leaking, you should look for;
a. frost on the tubing
b. puddles of refrigerant.
c. particles of filter drier core.
d. traces of oil.
D
Which part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has
not been used for serval months?
a. Suction service valve.
b. Rotating shaft seal.
c. One or both of the king valves.
d. Head gasket on discharge side.
B
Starting in 2019, what leak rate triggers the EPA requirement that commercial refrigeration
systems containing 50 pounds or more of R-22 be repaired?
a. 10%.
b. 20%.
c. 30%.
d. 35%.
B
A comfort-cooling appliance containing 50 pounds or more of R-22 is found to be leaking
beyond the applicable leak rate threshold. Unless granted additional time, how many days do you
have to repair the leak and conduct the initial leak verification test?
a. 1 day
b. 10 days
c. 30 days
d. 45 days
C
,After a leak repair of a supermarket rack using 3000 lbs. of R-22 and a successful initial
verification test, when must a follow-up leak verification test be conducted?
a. The same day.
b. The next day.
c. Within 10 days.
d. Within 30 days.
C
An initial leak verification test failed after repairing a leak in a rack refrigeration system for a
supermarket using an HCFC refrigerant. What would be the next step(s)?
a. Immediately retrofit or retire the appliance.
b. Conduct additional repairs within the 30-day repair window or mothball the appliance.
c. Conduct a follow-up verification test.
d. Report the amount of refrigerant added to the system to the EPA.
B
Which of the following CANNOT be used as a reason to extend the appliance repair deadlines?
a. Requirements of federal, state, or local regulations make the repair within 30 days impossible.
b. A necessary component is not available.
c. The appliance is located in an area that is subject to radiological contamination.
d. A certified service technician is not available.
D
When a trace gas becomes absolutely necessary, which of the available refrigerants should be
used to help locate a leak?
a. Nitrogen with HCFC R-22.
b. R-22 due to its universal system compatibility and its miscibility with various oils.
c. Nitrogen with a trace amount of the system's design refrigerant.
d. Nitrogen with HFC R-410A.
C
Which of the following is an indicator of a leak in a high-pressure system with a capillary tube?
a. High head pressure
b. Low water temperature
c. Excessive superheat
d. Frequent purging
C
Recovered refrigerant may contain which of the following impurities?
a. Ammonia, carbon dioxide, and methyl chloride
, b. Sodium chloride, potassium nitrate, and silicone oil
c. Sulphur dioxide and methane
d. Acids, moisture, and oil
D
What is the first thing to do when a new system has been assembled and is ready for testing?
a. Pull a vacuum.
b. Pressurize with an inert gas and leak check.
c. Pressurize with the refrigerant to be used in the system.
d. Introduce an initial charge of refrigerant and start the compressor.
B
What is the best use for testing with soap bubbles?
a. To pinpoint refrigerant leaks.
b. To find refrigerant leaks in coil fin area.
c. To detect leaks in water tube condensers.
d. To detect leaks if the condenser is excessively dirty.
A
Which leak repair category does the EPA define as air-conditioning appliances used to provide
cooling in order to control heat and/or humidity in occupied facilities including, but not limited
to, residential, office, and commercial buildings?
a. Commercial refrigeration
b. Industrial process refrigeration
c. Comfort cooling
d. Ice making refrigeration
C
Which of the following additions of refrigerant, when added to an appliance containing 50 or
more pounds of an ozone-depleting refrigerant, triggers the requirement to calculate the leak
rate?
a. Following a retrofit.
b. During the installation of a new appliance.
c. When using a qualified seasonal variance.
d. When topping off the system.
D
What must an owner of a commercial refrigeration appliance with a charge of 2000 pounds of r-
22 do once the leak rate threshold has been exceeded?
a. Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
LATEST UPDATE 2026 EXAM
QUESTIONS AND ANSWERS
When first inspecting a hermetic system known to be leaking, you should look for;
a. frost on the tubing
b. puddles of refrigerant.
c. particles of filter drier core.
d. traces of oil.
D
Which part of a belt-driven non-hermetic compressor is most likely to leak if the compressor has
not been used for serval months?
a. Suction service valve.
b. Rotating shaft seal.
c. One or both of the king valves.
d. Head gasket on discharge side.
B
Starting in 2019, what leak rate triggers the EPA requirement that commercial refrigeration
systems containing 50 pounds or more of R-22 be repaired?
a. 10%.
b. 20%.
c. 30%.
d. 35%.
B
A comfort-cooling appliance containing 50 pounds or more of R-22 is found to be leaking
beyond the applicable leak rate threshold. Unless granted additional time, how many days do you
have to repair the leak and conduct the initial leak verification test?
a. 1 day
b. 10 days
c. 30 days
d. 45 days
C
,After a leak repair of a supermarket rack using 3000 lbs. of R-22 and a successful initial
verification test, when must a follow-up leak verification test be conducted?
a. The same day.
b. The next day.
c. Within 10 days.
d. Within 30 days.
C
An initial leak verification test failed after repairing a leak in a rack refrigeration system for a
supermarket using an HCFC refrigerant. What would be the next step(s)?
a. Immediately retrofit or retire the appliance.
b. Conduct additional repairs within the 30-day repair window or mothball the appliance.
c. Conduct a follow-up verification test.
d. Report the amount of refrigerant added to the system to the EPA.
B
Which of the following CANNOT be used as a reason to extend the appliance repair deadlines?
a. Requirements of federal, state, or local regulations make the repair within 30 days impossible.
b. A necessary component is not available.
c. The appliance is located in an area that is subject to radiological contamination.
d. A certified service technician is not available.
D
When a trace gas becomes absolutely necessary, which of the available refrigerants should be
used to help locate a leak?
a. Nitrogen with HCFC R-22.
b. R-22 due to its universal system compatibility and its miscibility with various oils.
c. Nitrogen with a trace amount of the system's design refrigerant.
d. Nitrogen with HFC R-410A.
C
Which of the following is an indicator of a leak in a high-pressure system with a capillary tube?
a. High head pressure
b. Low water temperature
c. Excessive superheat
d. Frequent purging
C
Recovered refrigerant may contain which of the following impurities?
a. Ammonia, carbon dioxide, and methyl chloride
, b. Sodium chloride, potassium nitrate, and silicone oil
c. Sulphur dioxide and methane
d. Acids, moisture, and oil
D
What is the first thing to do when a new system has been assembled and is ready for testing?
a. Pull a vacuum.
b. Pressurize with an inert gas and leak check.
c. Pressurize with the refrigerant to be used in the system.
d. Introduce an initial charge of refrigerant and start the compressor.
B
What is the best use for testing with soap bubbles?
a. To pinpoint refrigerant leaks.
b. To find refrigerant leaks in coil fin area.
c. To detect leaks in water tube condensers.
d. To detect leaks if the condenser is excessively dirty.
A
Which leak repair category does the EPA define as air-conditioning appliances used to provide
cooling in order to control heat and/or humidity in occupied facilities including, but not limited
to, residential, office, and commercial buildings?
a. Commercial refrigeration
b. Industrial process refrigeration
c. Comfort cooling
d. Ice making refrigeration
C
Which of the following additions of refrigerant, when added to an appliance containing 50 or
more pounds of an ozone-depleting refrigerant, triggers the requirement to calculate the leak
rate?
a. Following a retrofit.
b. During the installation of a new appliance.
c. When using a qualified seasonal variance.
d. When topping off the system.
D
What must an owner of a commercial refrigeration appliance with a charge of 2000 pounds of r-
22 do once the leak rate threshold has been exceeded?
a. Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
