SkillCat EPA 608: 244 Questions &
Complete Detailed Solutions (New
2026/2027 Update) This SkillCat
EXAM
SkillCat EPA 608: 244 Questions & Complete Detailed Solutions (New 2026/2027
Update) This SkillCat EPA 608: 244 Questions and Answers is a popular,
comp rehensive compilation designed to help technicians pass the EPA 608
Universal Certification
All candidates must pass this section before taking a Type I, II, III, or
Universal exam.
1. What is the primary purpose of the Clean Air Act (CAA) regarding
HVAC?
A) To set energy efficiency standards for appliances
B) To phase out the production and use of ozone-depleting substances
C) To regulate the disposal of general construction waste
D) To establish safety standards for high-pressure systems
,,,answer,,,: B → To phase out the production and use of ozone-depleting
substances
Rationale: The Clean Air Act (CAA), particularly Title VI, is the federal law
that mandates the phase-out of substances that deplete the stratospheric
ozone layer, including CFCs and HCFCs. It prohibits the intentional
venting of these refrigerants and establishes technician certification and
recovery requirements.
2. What is the Montreal Protocol?
A) A Canadian safety standard for refrigerant handling
,B) An international treaty to phase out ozone-depleting substances
C) A federal law governing refrigerant sales
D) A certification program for HVAC technicians
,,,answer,,,: B → An international treaty to phase out ozone-depleting
substances
Rationale: The Montreal Protocol is a landmark global environmental
agreement ratified by nearly every country. Its objective is to protect the
ozone layer by phasing out the production and consumption of
substances that cause ozone depletion, such as CFCs and HCFCs.
3. What does ozone in the stratosphere do?
A) Traps heat near the earth's surface
B) Forms smog in urban areas
C) Protects the earth from harmful ultraviolet (UV) radiation
D) Contributes to global warming
,,,answer,,,: C → Protects the earth from harmful ultraviolet (UV) radiation
Rationale: Stratospheric ozone absorbs the majority of the sun's
biologically harmful UV-B and UV-C radiation. Without this protective
layer, rates of skin cancer, cataracts, and damage to ecosystems would
increase dramatically.
4. What molecule is primarily responsible for destroying ozone in the
stratosphere?
A) Carbon dioxide (CO₂)
B) Chlorine (Cl)
C) Nitrogen (N₂)
D) Hydrogen (H₂)
,,,answer,,,: B → Chlorine (Cl)
Rationale: Chlorine atoms are released when CFC and HCFC molecules
break down under intense UV radiation in the stratosphere. A single
,chlorine atom can catalytically destroy over 100,000 ozone molecules
before it is removed from the stratosphere.
5. Do natural events like volcanic eruptions contribute chlorine to the
stratosphere?
A) No, only human-made chemicals can reach the stratosphere
B) Yes, but they are not the primary source
C) No, volcanic emissions are only water vapor and sulfur dioxide
D) Yes, and they are the primary cause of ozone depletion
,,,answer,,,: B → Yes, but they are not the primary source
Rationale: While volcanic eruptions do release some chlorine, the vast
majority (approximately 85%) of chlorine in the stratosphere comes from
human-made chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons
(HCFCs).
6. By what year were all CFCs phased out of production in the United
States?
A) 1987
B) 1995
C) 2000
D) 2010
,,,answer,,,: B → 1995
Rationale: Under the Clean Air Act and the Montreal Protocol, the
production of all chlorofluorocarbons (CFCs) was completely phased out
in the U.S. on December 31, 1995.
7. When was R-22 (HCFC) production phased out for use in new
equipment?
A) 1995
B) 2005
C) 2010
, D) 2020
,,,answer,,,: D → 2020
Rationale: The production of HCFC-22 (R-22) was phased out as of
January 1, 2020. While existing systems can continue to operate, no new
R-22 can be produced or imported, making recycled and reclaimed R-22
the only sources available.
8. Which refrigerants must equipment be certified to recover?
A) Only CFCs
B) Only HCFCs
C) Only HFCs
D) CFCs, HCFCs, and HFCs
,,,answer,,,: D → CFCs, HCFCs, and HFCs
Rationale: Recovery equipment certified by an EPA-approved testing
organization is required to recover all refrigerants, including CFCs,
HCFCs, and HFCs. The current standard is set by UL 1963 or AHRI 740.
9. Who can you legally sell R-22 refrigerant to?
A) Any individual who pays cash
B) Only licensed plumbers
C) A technician or business with EPA Section 608 Certification
D) Any HVAC parts store without verification
,,,answer,,,: C → A technician or business with EPA Section 608
Certification
Rationale: The Clean Air Act prohibits selling CFC or HCFC refrigerants to
anyone other than technicians certified under Section 608 or to
businesses that employ such technicians. This ensures only qualified
personnel handle these substances.
Complete Detailed Solutions (New
2026/2027 Update) This SkillCat
EXAM
SkillCat EPA 608: 244 Questions & Complete Detailed Solutions (New 2026/2027
Update) This SkillCat EPA 608: 244 Questions and Answers is a popular,
comp rehensive compilation designed to help technicians pass the EPA 608
Universal Certification
All candidates must pass this section before taking a Type I, II, III, or
Universal exam.
1. What is the primary purpose of the Clean Air Act (CAA) regarding
HVAC?
A) To set energy efficiency standards for appliances
B) To phase out the production and use of ozone-depleting substances
C) To regulate the disposal of general construction waste
D) To establish safety standards for high-pressure systems
,,,answer,,,: B → To phase out the production and use of ozone-depleting
substances
Rationale: The Clean Air Act (CAA), particularly Title VI, is the federal law
that mandates the phase-out of substances that deplete the stratospheric
ozone layer, including CFCs and HCFCs. It prohibits the intentional
venting of these refrigerants and establishes technician certification and
recovery requirements.
2. What is the Montreal Protocol?
A) A Canadian safety standard for refrigerant handling
,B) An international treaty to phase out ozone-depleting substances
C) A federal law governing refrigerant sales
D) A certification program for HVAC technicians
,,,answer,,,: B → An international treaty to phase out ozone-depleting
substances
Rationale: The Montreal Protocol is a landmark global environmental
agreement ratified by nearly every country. Its objective is to protect the
ozone layer by phasing out the production and consumption of
substances that cause ozone depletion, such as CFCs and HCFCs.
3. What does ozone in the stratosphere do?
A) Traps heat near the earth's surface
B) Forms smog in urban areas
C) Protects the earth from harmful ultraviolet (UV) radiation
D) Contributes to global warming
,,,answer,,,: C → Protects the earth from harmful ultraviolet (UV) radiation
Rationale: Stratospheric ozone absorbs the majority of the sun's
biologically harmful UV-B and UV-C radiation. Without this protective
layer, rates of skin cancer, cataracts, and damage to ecosystems would
increase dramatically.
4. What molecule is primarily responsible for destroying ozone in the
stratosphere?
A) Carbon dioxide (CO₂)
B) Chlorine (Cl)
C) Nitrogen (N₂)
D) Hydrogen (H₂)
,,,answer,,,: B → Chlorine (Cl)
Rationale: Chlorine atoms are released when CFC and HCFC molecules
break down under intense UV radiation in the stratosphere. A single
,chlorine atom can catalytically destroy over 100,000 ozone molecules
before it is removed from the stratosphere.
5. Do natural events like volcanic eruptions contribute chlorine to the
stratosphere?
A) No, only human-made chemicals can reach the stratosphere
B) Yes, but they are not the primary source
C) No, volcanic emissions are only water vapor and sulfur dioxide
D) Yes, and they are the primary cause of ozone depletion
,,,answer,,,: B → Yes, but they are not the primary source
Rationale: While volcanic eruptions do release some chlorine, the vast
majority (approximately 85%) of chlorine in the stratosphere comes from
human-made chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons
(HCFCs).
6. By what year were all CFCs phased out of production in the United
States?
A) 1987
B) 1995
C) 2000
D) 2010
,,,answer,,,: B → 1995
Rationale: Under the Clean Air Act and the Montreal Protocol, the
production of all chlorofluorocarbons (CFCs) was completely phased out
in the U.S. on December 31, 1995.
7. When was R-22 (HCFC) production phased out for use in new
equipment?
A) 1995
B) 2005
C) 2010
, D) 2020
,,,answer,,,: D → 2020
Rationale: The production of HCFC-22 (R-22) was phased out as of
January 1, 2020. While existing systems can continue to operate, no new
R-22 can be produced or imported, making recycled and reclaimed R-22
the only sources available.
8. Which refrigerants must equipment be certified to recover?
A) Only CFCs
B) Only HCFCs
C) Only HFCs
D) CFCs, HCFCs, and HFCs
,,,answer,,,: D → CFCs, HCFCs, and HFCs
Rationale: Recovery equipment certified by an EPA-approved testing
organization is required to recover all refrigerants, including CFCs,
HCFCs, and HFCs. The current standard is set by UL 1963 or AHRI 740.
9. Who can you legally sell R-22 refrigerant to?
A) Any individual who pays cash
B) Only licensed plumbers
C) A technician or business with EPA Section 608 Certification
D) Any HVAC parts store without verification
,,,answer,,,: C → A technician or business with EPA Section 608
Certification
Rationale: The Clean Air Act prohibits selling CFC or HCFC refrigerants to
anyone other than technicians certified under Section 608 or to
businesses that employ such technicians. This ensures only qualified
personnel handle these substances.
