EPA 608 CORE STUDY GUIDE 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES EPA SECTION 608 CORE
CERTIFICATION EXAM PREPARATION
REFRIGERANT SAFETY, CLEAN AIR ACT,
RECOVERY AND RECYCLING, LEAK
DETECTION, HVAC TECHNICIAN REVIEW
The level of chlorine detected in the atmosphere is _________ the level of
fluorine. - CORRECT ANSWER -Increasing faster than
A "compound gauge": - CORRECT ANSWER -Can only be used for low
pressures - Has different unit scales
According to EPA regulations, when system flushing is required following a
compressor burnout, the following refrigerant must be used: - CORRECT
ANSWER -System flushing with refrigerants is illegal
A CFC contains: - CORRECT ANSWER -Chlorine, fluorine, carbon
A CFC - 11 cylinder is: - CORRECT ANSWER -Orange
An HFC-134a cylinder is: - CORRECT ANSWER -Sky blue or pale blue
,A chlorine atom will combine with an ozone molecule to form: - CORRECT
ANSWER -Chlorine Monoxide
An HCFC contains: - CORRECT ANSWER -Hydrogen, chlorine, fluorine,
carbon
An HFC contains the following chemicals: - CORRECT ANSWER -Hydrogen,
fluorine, carbon
Alkylbenzene lubricants are associated with: - CORRECT ANSWER -Ternary
blends
All appliances currently manufactured or imported into the United States
must be equipped with: - CORRECT ANSWER -A service aperture or device
to enable the removal of refrigerant
A recovery cylinder is: - CORRECT ANSWER -Gray with yellow top
A refillable cylinder may be filled to a maximum of: - CORRECT ANSWER -
80% of its liquid weight
A refrigerant heated above its boiling point is: - CORRECT ANSWER -
Superheated
, A refrigeration system should not be recovered unless a gauge indicates a
minimum pressure of _________ Psig within the system. - CORRECT
ANSWER -15 Psig
Any vapor refrigerant vented from the top of a graduated charging cylinder
while filling the charging cylinder with liquid: - CORRECT ANSWER -Must
be recovered
As of January 1st, 1996: - CORRECT ANSWER -It is illegal to import or
manufacture CFCs in the United States
As of November 15, 1993, all recovery equipment must: - CORRECT
ANSWER -Be fitted with low loss fittings - Be certified by an EPA approved
agency
As of November 15, 1993, recovery machines: - CORRECT ANSWER -Must be
certified to meet EPA standards
A system may be said to be properly dehydrated when: - CORRECT ANSWER
-The vacuum indicator has reached and held the required vacuum for a
period of time
A technician who violates provisions of the CAA: - CORRECT ANSWER -May
be fined - May lose certification - May be required to appear in court
Refrigerant cylinders should be transported in a ______________
position: - CORRECT ANSWER -Vertical
COMPREHENSIVE PRACTICE QUESTIONS
AND CORRECT ANSWERS WITH DETAILED
RATIONALES EPA SECTION 608 CORE
CERTIFICATION EXAM PREPARATION
REFRIGERANT SAFETY, CLEAN AIR ACT,
RECOVERY AND RECYCLING, LEAK
DETECTION, HVAC TECHNICIAN REVIEW
The level of chlorine detected in the atmosphere is _________ the level of
fluorine. - CORRECT ANSWER -Increasing faster than
A "compound gauge": - CORRECT ANSWER -Can only be used for low
pressures - Has different unit scales
According to EPA regulations, when system flushing is required following a
compressor burnout, the following refrigerant must be used: - CORRECT
ANSWER -System flushing with refrigerants is illegal
A CFC contains: - CORRECT ANSWER -Chlorine, fluorine, carbon
A CFC - 11 cylinder is: - CORRECT ANSWER -Orange
An HFC-134a cylinder is: - CORRECT ANSWER -Sky blue or pale blue
,A chlorine atom will combine with an ozone molecule to form: - CORRECT
ANSWER -Chlorine Monoxide
An HCFC contains: - CORRECT ANSWER -Hydrogen, chlorine, fluorine,
carbon
An HFC contains the following chemicals: - CORRECT ANSWER -Hydrogen,
fluorine, carbon
Alkylbenzene lubricants are associated with: - CORRECT ANSWER -Ternary
blends
All appliances currently manufactured or imported into the United States
must be equipped with: - CORRECT ANSWER -A service aperture or device
to enable the removal of refrigerant
A recovery cylinder is: - CORRECT ANSWER -Gray with yellow top
A refillable cylinder may be filled to a maximum of: - CORRECT ANSWER -
80% of its liquid weight
A refrigerant heated above its boiling point is: - CORRECT ANSWER -
Superheated
, A refrigeration system should not be recovered unless a gauge indicates a
minimum pressure of _________ Psig within the system. - CORRECT
ANSWER -15 Psig
Any vapor refrigerant vented from the top of a graduated charging cylinder
while filling the charging cylinder with liquid: - CORRECT ANSWER -Must
be recovered
As of January 1st, 1996: - CORRECT ANSWER -It is illegal to import or
manufacture CFCs in the United States
As of November 15, 1993, all recovery equipment must: - CORRECT
ANSWER -Be fitted with low loss fittings - Be certified by an EPA approved
agency
As of November 15, 1993, recovery machines: - CORRECT ANSWER -Must be
certified to meet EPA standards
A system may be said to be properly dehydrated when: - CORRECT ANSWER
-The vacuum indicator has reached and held the required vacuum for a
period of time
A technician who violates provisions of the CAA: - CORRECT ANSWER -May
be fined - May lose certification - May be required to appear in court
Refrigerant cylinders should be transported in a ______________
position: - CORRECT ANSWER -Vertical
