P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
EPA 608 Core Certification
Exam Preparation
Questions & Answers
2026/2027 Latest-Style
Edition (Rationales)
Verified Answers Exam Ready With Rationales 111 QUESTIONS
DOCUMENT OVERVIEW
This EPA 608 Core Certification Exam preparation document contains 111 questions with
provided correct answers and detailed rationales, covering essential refrigerant handling
principles. It is a comprehensive study aid for technicians preparing for their EPA
certification. This resource is ideal for reviewing key concepts and reinforcing knowledge
to ensure successful certification.
TOPICS
• Regulations & Compliance • Refrigerant Types & Properties
• Refrigerant Handling & Recovery • Ozone Depletion & Environmental
Impact
• Safety & Health Hazards • System Components & Maintenance
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 111
Refrigeration technicians who violate the clean air act can:
A. lose their epa certification
B. be fined.
C. be required to appear in federal court
D. all of the above
ANSWER
all of the above
RATIONALE
Violations of the Clean Air Act by refrigeration technicians can result in multiple penalties. These
consequences are designed to enforce environmental protection regulations and deter non-
compliance with refrigerant handling standards. Therefore, a range of disciplinary actions,
including certification revocation, financial penalties, and legal proceedings, may be imposed.
Q2 QUESTION 2 OF 111
It has been illegal to vent substitutes for CFC and HCFC refrigerants since:
ANSWER
november 1995
RATIONALE
The Clean Air Act Amendments of 1990 mandated the phase-out of ozone-depleting refrigerants.
Venting substitutes for CFCs and HCFCs, which are also regulated, became illegal to prevent their
release into the atmosphere. This prohibition took effect in
Q3 QUESTION 3 OF 111
The term used to describe the fact that a refrigerant blend has a range of boiling or
condensing points at a constant pressure is ________ _________.
Page 2
, ANSWER
temperature glide
RATIONALE
Refrigerant blends composed of multiple components exhibit a temperature glide. This
phenomenon occurs because the composition of the liquid and vapor phases changes during
boiling or condensation at a constant pressure. the saturation temperature varies across a range
rather than remaining constant.
Q4 QUESTION 4 OF 111
CFCs will no longer be manufactured or imported into the U.S. after what year?
ANSWER
1995
RATIONALE
The Montreal Protocol, an international treaty designed to protect the ozone layer, mandated the
phase-out of ozone-depleting substances, including CFCs. This international agreement led to the
cessation of CFC production and importation in the U.S. by the specified year.
Q5 QUESTION 5 OF 111
A system is dehydrated to remove water and _____ ______.
ANSWER
water vapor
RATIONALE
Dehydration in HVAC systems removes both liquid water and gaseous water vapor. This process is
critical for preventing moisture-related issues like ice formation or corrosion that can damage
system components and reduce efficiency. Therefore, a complete dehydration process targets all
forms of water.
Page 3
, Q6 QUESTION 6 OF 111
The EPA's definition of a, type 1, small appliance, is a device that contains a factory charge of
_____ lbs or less and is hermetically sealed at the factory.
ANSWER
5
RATIONALE
EPA regulations define small appliances for refrigerant handling based on their factory charge size.
A device meeting the criteria for a Type I small appliance is specifically a unit with a hermetically
sealed system containing 5 pounds or less of refrigerant. This classification dictates specific
servicing and disposal requirements.
Q7 QUESTION 7 OF 111
Since this date, a person may not service, maintain, or dispose of appliances designed to
contain refrigerants without being appropriately certified.
ANSWER
november 14 1994
RATIONALE
The Clean Air Act Amendments of 1990 mandated regulations for refrigerant handling. Section 608
of the Act specifically established certification requirements for individuals working with
appliances containing refrigerants, effective from November 15, 1993, with full enforcement and
compliance typically referenced from November 14, 1994. This date marks the operational deadline
for these crucial EPA regulations.
Q8 QUESTION 8 OF 111
Since this date, only certified technicians may purchase refrigerants. The smallest cylinder a
608-certified technician may purchase is 20 pounds. Only a 609-certified (automotive)
technician may purchase smaller containers.
ANSWER
november 14 1994
Page 4
EPA 608 Core Certification
Exam Preparation
Questions & Answers
2026/2027 Latest-Style
Edition (Rationales)
Verified Answers Exam Ready With Rationales 111 QUESTIONS
DOCUMENT OVERVIEW
This EPA 608 Core Certification Exam preparation document contains 111 questions with
provided correct answers and detailed rationales, covering essential refrigerant handling
principles. It is a comprehensive study aid for technicians preparing for their EPA
certification. This resource is ideal for reviewing key concepts and reinforcing knowledge
to ensure successful certification.
TOPICS
• Regulations & Compliance • Refrigerant Types & Properties
• Refrigerant Handling & Recovery • Ozone Depletion & Environmental
Impact
• Safety & Health Hazards • System Components & Maintenance
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 111
Refrigeration technicians who violate the clean air act can:
A. lose their epa certification
B. be fined.
C. be required to appear in federal court
D. all of the above
ANSWER
all of the above
RATIONALE
Violations of the Clean Air Act by refrigeration technicians can result in multiple penalties. These
consequences are designed to enforce environmental protection regulations and deter non-
compliance with refrigerant handling standards. Therefore, a range of disciplinary actions,
including certification revocation, financial penalties, and legal proceedings, may be imposed.
Q2 QUESTION 2 OF 111
It has been illegal to vent substitutes for CFC and HCFC refrigerants since:
ANSWER
november 1995
RATIONALE
The Clean Air Act Amendments of 1990 mandated the phase-out of ozone-depleting refrigerants.
Venting substitutes for CFCs and HCFCs, which are also regulated, became illegal to prevent their
release into the atmosphere. This prohibition took effect in
Q3 QUESTION 3 OF 111
The term used to describe the fact that a refrigerant blend has a range of boiling or
condensing points at a constant pressure is ________ _________.
Page 2
, ANSWER
temperature glide
RATIONALE
Refrigerant blends composed of multiple components exhibit a temperature glide. This
phenomenon occurs because the composition of the liquid and vapor phases changes during
boiling or condensation at a constant pressure. the saturation temperature varies across a range
rather than remaining constant.
Q4 QUESTION 4 OF 111
CFCs will no longer be manufactured or imported into the U.S. after what year?
ANSWER
1995
RATIONALE
The Montreal Protocol, an international treaty designed to protect the ozone layer, mandated the
phase-out of ozone-depleting substances, including CFCs. This international agreement led to the
cessation of CFC production and importation in the U.S. by the specified year.
Q5 QUESTION 5 OF 111
A system is dehydrated to remove water and _____ ______.
ANSWER
water vapor
RATIONALE
Dehydration in HVAC systems removes both liquid water and gaseous water vapor. This process is
critical for preventing moisture-related issues like ice formation or corrosion that can damage
system components and reduce efficiency. Therefore, a complete dehydration process targets all
forms of water.
Page 3
, Q6 QUESTION 6 OF 111
The EPA's definition of a, type 1, small appliance, is a device that contains a factory charge of
_____ lbs or less and is hermetically sealed at the factory.
ANSWER
5
RATIONALE
EPA regulations define small appliances for refrigerant handling based on their factory charge size.
A device meeting the criteria for a Type I small appliance is specifically a unit with a hermetically
sealed system containing 5 pounds or less of refrigerant. This classification dictates specific
servicing and disposal requirements.
Q7 QUESTION 7 OF 111
Since this date, a person may not service, maintain, or dispose of appliances designed to
contain refrigerants without being appropriately certified.
ANSWER
november 14 1994
RATIONALE
The Clean Air Act Amendments of 1990 mandated regulations for refrigerant handling. Section 608
of the Act specifically established certification requirements for individuals working with
appliances containing refrigerants, effective from November 15, 1993, with full enforcement and
compliance typically referenced from November 14, 1994. This date marks the operational deadline
for these crucial EPA regulations.
Q8 QUESTION 8 OF 111
Since this date, only certified technicians may purchase refrigerants. The smallest cylinder a
608-certified technician may purchase is 20 pounds. Only a 609-certified (automotive)
technician may purchase smaller containers.
ANSWER
november 14 1994
Page 4
