EPA SECTION 609 CERTIFICATION PRACTICE EXAM /
study guide 2026/2027
Questions with Correct Answers and Rationales
guaranteed pass latest update
1. Section 609 of the Clean Air Act regulates the servicing of:
A. Commercial refrigeration systems
B. Motor vehicle air conditioning (MVAC) systems
C. Residential furnaces
D. Industrial chillers
Answer: B
Rationale: Section 609 covers refrigerant handling in MVAC
systems; stationary equipment is covered under Section 608.
2. Which Clean Air Act section covers stationary air conditioning and
refrigeration equipment?
A. Section 608
B. Section 609
C. Section 611
D. Section 112
Answer: A
Rationale: Section 608 governs stationary equipment, while Section
609 applies to MVAC servicing.
,3. Who must hold Section 609 certification?
A. Only vehicle owners
B. Only parts counter staff
C. Only fleet managers who never touch refrigerant
D. Technicians who service MVAC systems for payment or other
consideration
Answer: D
Rationale: Anyone who repairs or services MVAC refrigerant
circuits for consideration must be certified.
4. How long does Section 609 technician certification remain valid?
A. 1 year
B. 3 years
C. It does not expire
D. 5 years
Answer: C
Rationale: Section 609 certification is lifetime and does not require
renewal, though proof of certification should be kept.
5. Section 609 technician certification exams are administered by:
A. Local police departments
B. EPA-approved certifying organizations
C. Vehicle manufacturers only
D. The Department of Education
Answer: B
Rationale: EPA approves certification programs run by
organizations such as ASE and MACS.
,6. What is the Montreal Protocol?
A. An international treaty to phase out ozone-depleting
substances
B. A U.S. law about vehicle emissions testing
C. A refrigerant sales tax
D. A shop safety code
Answer: A
Rationale: The 1987 Montreal Protocol set the global schedule to
phase out ozone-depleting substances such as CFCs.
7. Where is the ozone layer located?
A. In the troposphere
B. At ground level
C. In the mesosphere only
D. In the stratosphere
Answer: D
Rationale: The ozone layer is in the stratosphere and absorbs
harmful ultraviolet radiation.
8. The stratospheric ozone layer protects life by absorbing:
A. Infrared heat
B. Radio waves
C. Harmful ultraviolet (UV-B) radiation
D. Visible light
Answer: C
Rationale: Ozone absorbs most UV-B, which can cause skin cancer
and cataracts.
, 9. Increased UV-B exposure from ozone depletion is linked to:
A. Improved crop yields
B. Skin cancer and cataracts
C. Lower sea levels
D. Reduced skin damage
Answer: B
Rationale: Greater UV-B reaching Earth increases health risks and
harms ecosystems.
10. Why are chlorine-containing refrigerants harmful to the ozone
layer?
A. Chlorine atoms released in the stratosphere destroy ozone
molecules in a repeating reaction
B. They make the air too humid
C. They dissolve in rain
D. They absorb heat
Answer: A
Rationale: A single chlorine atom can destroy a very large number
of ozone molecules.
11. R-12 is classified as a:
A. HFC (hydrofluorocarbon)
B. HFO (hydrofluoroolefin)
C. Hydrocarbon
D. CFC (chlorofluorocarbon)
Answer: D
Rationale: R-12 contains chlorine, fluorine, and carbon, so it is a
CFC.
study guide 2026/2027
Questions with Correct Answers and Rationales
guaranteed pass latest update
1. Section 609 of the Clean Air Act regulates the servicing of:
A. Commercial refrigeration systems
B. Motor vehicle air conditioning (MVAC) systems
C. Residential furnaces
D. Industrial chillers
Answer: B
Rationale: Section 609 covers refrigerant handling in MVAC
systems; stationary equipment is covered under Section 608.
2. Which Clean Air Act section covers stationary air conditioning and
refrigeration equipment?
A. Section 608
B. Section 609
C. Section 611
D. Section 112
Answer: A
Rationale: Section 608 governs stationary equipment, while Section
609 applies to MVAC servicing.
,3. Who must hold Section 609 certification?
A. Only vehicle owners
B. Only parts counter staff
C. Only fleet managers who never touch refrigerant
D. Technicians who service MVAC systems for payment or other
consideration
Answer: D
Rationale: Anyone who repairs or services MVAC refrigerant
circuits for consideration must be certified.
4. How long does Section 609 technician certification remain valid?
A. 1 year
B. 3 years
C. It does not expire
D. 5 years
Answer: C
Rationale: Section 609 certification is lifetime and does not require
renewal, though proof of certification should be kept.
5. Section 609 technician certification exams are administered by:
A. Local police departments
B. EPA-approved certifying organizations
C. Vehicle manufacturers only
D. The Department of Education
Answer: B
Rationale: EPA approves certification programs run by
organizations such as ASE and MACS.
,6. What is the Montreal Protocol?
A. An international treaty to phase out ozone-depleting
substances
B. A U.S. law about vehicle emissions testing
C. A refrigerant sales tax
D. A shop safety code
Answer: A
Rationale: The 1987 Montreal Protocol set the global schedule to
phase out ozone-depleting substances such as CFCs.
7. Where is the ozone layer located?
A. In the troposphere
B. At ground level
C. In the mesosphere only
D. In the stratosphere
Answer: D
Rationale: The ozone layer is in the stratosphere and absorbs
harmful ultraviolet radiation.
8. The stratospheric ozone layer protects life by absorbing:
A. Infrared heat
B. Radio waves
C. Harmful ultraviolet (UV-B) radiation
D. Visible light
Answer: C
Rationale: Ozone absorbs most UV-B, which can cause skin cancer
and cataracts.
, 9. Increased UV-B exposure from ozone depletion is linked to:
A. Improved crop yields
B. Skin cancer and cataracts
C. Lower sea levels
D. Reduced skin damage
Answer: B
Rationale: Greater UV-B reaching Earth increases health risks and
harms ecosystems.
10. Why are chlorine-containing refrigerants harmful to the ozone
layer?
A. Chlorine atoms released in the stratosphere destroy ozone
molecules in a repeating reaction
B. They make the air too humid
C. They dissolve in rain
D. They absorb heat
Answer: A
Rationale: A single chlorine atom can destroy a very large number
of ozone molecules.
11. R-12 is classified as a:
A. HFC (hydrofluorocarbon)
B. HFO (hydrofluoroolefin)
C. Hydrocarbon
D. CFC (chlorofluorocarbon)
Answer: D
Rationale: R-12 contains chlorine, fluorine, and carbon, so it is a
CFC.
