1|Page
EPA TYPE 3 2026/2027 BANK QUESTIONS WITH DETAILED
VERIFIED ANSWERS / EXAM QUESTIONS WILL COME
FROM HERE (100% CORRECT ANSWERS/ A+ GRADED
A hydrostatic thest kit will; - ANSWERS--determine if a tube leaks.
When leak testing a low pressure centrifugal with nitrogen, what is the
maximum test pressure? - ANSWERS--10 psig
Excessive running of a purge system on a low-pressure chiller generally
indicates what condition? - ANSWERS--Leaking system.
According to ASRAE Guidline 3, the system should be checked for leaks
if during a standard vacuum test the pressure in a system rises from 1
mm toa level above; - ANSWERS--2.5 mm Hg.
If an owner operator of an apliance with 50 or more pounds of an
ozone-depleting refrigerant charge are required to retrofit or retire an
appliance that has exceeded the treshold leak rate, how many months
do they have if the replacement appliance uses a refrigerant exempt
from venting prohibition? - ANSWERS--18 months
,2|Page
When must the leak rate of an appliance be calculated? - ANSWERS--
When topping off or recharging a system due to a loss of charge.
Starting in 2019, what is the leak rate threshold for comfort cooling
appliances with a full charge of 50 Or more pounds. - ANSWERS--10%
A typical setting for the high pressure cut-out control on a recvery unit
used for evacuating the refrigerant from a low-pressure chiler is; -
ANSWERS--10 psig
Refrigerant removal from a low-pressure system starts;with; -
ANSWERS--liquid removal
Why should the oil be removed from a low-pressure system at 130
degrees F.? - ANSWERS--Less refrigerant will be contained in the oil at
the higher temperature.
What is a typical advantage of a water cooled recovery unit? -
ANSWERS--Faster recovery of large quantities of refrigerant.
Why must water be circulated through a chiller during refrigerant
evacuation? - ANSWERS--To prevent freezing of water in the appliance.
Where is the lowest access point on a low-pressure air-conditioning
appliance? - ANSWERS--Evaporator charging valve
,3|Page
What should you do after reaching the required recovery vacuum on a
low-pressure appliance? - ANSWERS--Wait for at least a few minutes to
see if the system pressure rises before charging.
When should an appliance NOT be evacuated all the way to the
prescribed level? - ANSWERS--When leaks in the appliance make
evacuation to the prescribed level unattainable.
Which of the following statements is true of recycling and recovery
equipment? - ANSWERS--It must be labled as certified to meet EPA's
requirements.
How long must a technician evacuating refrigerant from appliances
with a full charge of more than 5 pounds and less than 50 pounds that
are being disposed of keep records of the event? - ANSWERS--3 years
What evacuation level must technicians recover refrigerant to before
disposing a low-pressure appliance? - ANSWERS--25mm of Hg absolute
Which of the following always falls under the EPA definition for "major,
maintenance, service, or repair?" - ANSWERS--Replacing a compressor.
Where is refrigerant added to a centrifugal machine? - ANSWERS--
Evaporator charging valve.
, 4|Page
Why do chillers using low-pressuree refrigerants require purge units? -
ANSWERS--These systems operate below atmospheric pressure.
Which of the following is a reason to take an oil sample? - ANSWERS--
The unit has a compressor burnout.
Which of the following indicates air in a low-pressure system? -
ANSWERS--High head pressure.
What should be used to remove ice fron sight glasses or viewing
glasses? - ANSWERS--Isopropyl alcohol
What is the typical design burst pressure for a rupture disk on a low-
pressure centrifugal air-conditioning system? - ANSWERS--15 psig
Where would you place a leak detector probe to check gas leaks into
the water box with the water removed? - ANSWERS--In the drain valve
opening.
Leak testing a low-pressure refrigeration system with nitrogen in excess
of 10 psig could cause which of the following to fail? - ANSWERS--
Rupture disc.
EPA TYPE 3 2026/2027 BANK QUESTIONS WITH DETAILED
VERIFIED ANSWERS / EXAM QUESTIONS WILL COME
FROM HERE (100% CORRECT ANSWERS/ A+ GRADED
A hydrostatic thest kit will; - ANSWERS--determine if a tube leaks.
When leak testing a low pressure centrifugal with nitrogen, what is the
maximum test pressure? - ANSWERS--10 psig
Excessive running of a purge system on a low-pressure chiller generally
indicates what condition? - ANSWERS--Leaking system.
According to ASRAE Guidline 3, the system should be checked for leaks
if during a standard vacuum test the pressure in a system rises from 1
mm toa level above; - ANSWERS--2.5 mm Hg.
If an owner operator of an apliance with 50 or more pounds of an
ozone-depleting refrigerant charge are required to retrofit or retire an
appliance that has exceeded the treshold leak rate, how many months
do they have if the replacement appliance uses a refrigerant exempt
from venting prohibition? - ANSWERS--18 months
,2|Page
When must the leak rate of an appliance be calculated? - ANSWERS--
When topping off or recharging a system due to a loss of charge.
Starting in 2019, what is the leak rate threshold for comfort cooling
appliances with a full charge of 50 Or more pounds. - ANSWERS--10%
A typical setting for the high pressure cut-out control on a recvery unit
used for evacuating the refrigerant from a low-pressure chiler is; -
ANSWERS--10 psig
Refrigerant removal from a low-pressure system starts;with; -
ANSWERS--liquid removal
Why should the oil be removed from a low-pressure system at 130
degrees F.? - ANSWERS--Less refrigerant will be contained in the oil at
the higher temperature.
What is a typical advantage of a water cooled recovery unit? -
ANSWERS--Faster recovery of large quantities of refrigerant.
Why must water be circulated through a chiller during refrigerant
evacuation? - ANSWERS--To prevent freezing of water in the appliance.
Where is the lowest access point on a low-pressure air-conditioning
appliance? - ANSWERS--Evaporator charging valve
,3|Page
What should you do after reaching the required recovery vacuum on a
low-pressure appliance? - ANSWERS--Wait for at least a few minutes to
see if the system pressure rises before charging.
When should an appliance NOT be evacuated all the way to the
prescribed level? - ANSWERS--When leaks in the appliance make
evacuation to the prescribed level unattainable.
Which of the following statements is true of recycling and recovery
equipment? - ANSWERS--It must be labled as certified to meet EPA's
requirements.
How long must a technician evacuating refrigerant from appliances
with a full charge of more than 5 pounds and less than 50 pounds that
are being disposed of keep records of the event? - ANSWERS--3 years
What evacuation level must technicians recover refrigerant to before
disposing a low-pressure appliance? - ANSWERS--25mm of Hg absolute
Which of the following always falls under the EPA definition for "major,
maintenance, service, or repair?" - ANSWERS--Replacing a compressor.
Where is refrigerant added to a centrifugal machine? - ANSWERS--
Evaporator charging valve.
, 4|Page
Why do chillers using low-pressuree refrigerants require purge units? -
ANSWERS--These systems operate below atmospheric pressure.
Which of the following is a reason to take an oil sample? - ANSWERS--
The unit has a compressor burnout.
Which of the following indicates air in a low-pressure system? -
ANSWERS--High head pressure.
What should be used to remove ice fron sight glasses or viewing
glasses? - ANSWERS--Isopropyl alcohol
What is the typical design burst pressure for a rupture disk on a low-
pressure centrifugal air-conditioning system? - ANSWERS--15 psig
Where would you place a leak detector probe to check gas leaks into
the water box with the water removed? - ANSWERS--In the drain valve
opening.
Leak testing a low-pressure refrigeration system with nitrogen in excess
of 10 psig could cause which of the following to fail? - ANSWERS--
Rupture disc.
