EPA SECTION 608 UNIVERSAL
CERTIFICATION EXAM STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED ANSWERS WITH DETAILED
RATIONALES CORE, TYPE I, TYPE II AND
TYPE III REFRIGERANT RECOVERY, LEAK
DETECTION, R-410A, R-134A AND HVAC
TECHNICIAN EXAM PREP
When using recovery or recycling equipment that was manufactured
BEFORE November 15, 1993, technicians must evacuate a unit that has a
normal charge of 10 pounds of CFC-500 to _______ before disposing of
the system. - CORRECT ANSWER -4 inches of Hg vacuum.
An oil sample should be taken when _________. - CORRECT ANSWER -
The compressor has burned-out.
When a new system has been assembled, the first thing to do is? - CORRECT
ANSWER -Pressurize the system with an inert gas & leak check.
After installation of a field-piped R-410A split heat pulp, the unit should
first be? - CORRECT ANSWER -Pressurized with nitrogen then leak checked.
The EPA regulations require that any appliances containing more than 50
pounds of refrigerant (except for commercial & industrial process
, refrigeration) must be repaired when the leak rate exceeds _________ of
the charge per year? - CORRECT ANSWER -15%
R-410A requires recovery tanks rated for at least? - CORRECT ANSWER -
400 psig
After refrigerant liquid has been recovered from a system, any remaining
vapor is? - CORRECT ANSWER -Condensed by the recovery system.
Your recovery/recycling machine has R-502 refrigerant in it. You now have
to recover refrigerant from a unit with R-22. What must be done before the
R-22 refrigerant can be recovered/recycled? - CORRECT ANSWER -Recover
as much R-502 from the recovery unit as possible, change filter, & evacuate.
In a refrigeration system with a TXV (or other type of throttling device), the
component directly following the condenser is the? - CORRECT ANSWER -
Receiver
When charging an R-410A system that uses a water-cooled condenser, you
must first charge with vapor to a pressure of at least________, before
switching to liquid charging. - CORRECT ANSWER -120 psig
Recovered refrigerant may contain what? - CORRECT ANSWER -1.) Acids
2.) Moisture
3.) Oils
CERTIFICATION EXAM STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED ANSWERS WITH DETAILED
RATIONALES CORE, TYPE I, TYPE II AND
TYPE III REFRIGERANT RECOVERY, LEAK
DETECTION, R-410A, R-134A AND HVAC
TECHNICIAN EXAM PREP
When using recovery or recycling equipment that was manufactured
BEFORE November 15, 1993, technicians must evacuate a unit that has a
normal charge of 10 pounds of CFC-500 to _______ before disposing of
the system. - CORRECT ANSWER -4 inches of Hg vacuum.
An oil sample should be taken when _________. - CORRECT ANSWER -
The compressor has burned-out.
When a new system has been assembled, the first thing to do is? - CORRECT
ANSWER -Pressurize the system with an inert gas & leak check.
After installation of a field-piped R-410A split heat pulp, the unit should
first be? - CORRECT ANSWER -Pressurized with nitrogen then leak checked.
The EPA regulations require that any appliances containing more than 50
pounds of refrigerant (except for commercial & industrial process
, refrigeration) must be repaired when the leak rate exceeds _________ of
the charge per year? - CORRECT ANSWER -15%
R-410A requires recovery tanks rated for at least? - CORRECT ANSWER -
400 psig
After refrigerant liquid has been recovered from a system, any remaining
vapor is? - CORRECT ANSWER -Condensed by the recovery system.
Your recovery/recycling machine has R-502 refrigerant in it. You now have
to recover refrigerant from a unit with R-22. What must be done before the
R-22 refrigerant can be recovered/recycled? - CORRECT ANSWER -Recover
as much R-502 from the recovery unit as possible, change filter, & evacuate.
In a refrigeration system with a TXV (or other type of throttling device), the
component directly following the condenser is the? - CORRECT ANSWER -
Receiver
When charging an R-410A system that uses a water-cooled condenser, you
must first charge with vapor to a pressure of at least________, before
switching to liquid charging. - CORRECT ANSWER -120 psig
Recovered refrigerant may contain what? - CORRECT ANSWER -1.) Acids
2.) Moisture
3.) Oils
