EPA 608 CERTIFICATION EXAM QUESTIONS COMPLETE
WITH CORRECT VERIFIED ANSWERS AND RATIONALES
1. What is the minimum passing score required for all EPA Section 608
certification exams?
A) 65%
B) 70%
C) 75%
D) 80%
Answer: B - The EPA requires a score of 70% or higher to pass any of the
Section 608 certification exams (Type I, Type II, Type III, or Universal).
This standardized passing threshold applies across all certification
levels.
2. A technician who holds a Universal certification can perform which
of the following?
A) Only service small appliances
B) Only service high-pressure systems
C) Service all types of HVACR equipment
D) Only service low-pressure systems
Answer: C - Universal certification allows technicians to work on all
types of equipment including small appliances, high-pressure systems,
low-pressure systems, and all refrigerant types covered under Section
608.
,3. How many questions are on the EPA Universal certification exam?
A) 50
B) 75
C) 100
D) 125
Answer: C - The Universal certification exam consists of 100 questions
covering all four core sections: Core, Type I, Type II, and Type III.
4. Which federal law governs refrigerant handling and technician
certification requirements?
A) Clean Water Act
B) Clean Air Act Section 608
C) Resource Conservation and Recovery Act
D) Toxic Substances Control Act
Answer: B - Section 608 of the Clean Air Act is the federal law that
establishes requirements for refrigerant handling, technician
certification, and ozone-depleting substance management.
5. A technician must stay current with which types of regulations?
A) Only federal regulations
B) Only state regulations
C) Federal, state, and local laws
D) Only international regulations
Answer: C - Technicians must comply with all applicable federal, state,
and local regulations regarding refrigerant handling, as local
jurisdictions may have additional requirements beyond federal law.
6. True or False: Ground-level ozone reflects and absorbs harmful UV
rays from the sun.
A) True
,B) False
Answer: B - Ground-level ozone is a pollutant that forms smog and is
harmful to breathe. It does not reflect or absorb UV rays; that function
is performed by stratospheric ozone located 10-30 miles above the
Earth's surface.
7. What is the primary source of chlorine found in the stratosphere?
A) Volcanic eruptions
B) Ocean spray
C) Refrigerant emissions from human activities
D) Forest fires
Answer: C - Human-made refrigerants such as CFCs and HCFCs are the
primary source of chlorine in the stratosphere, not natural sources like
volcanoes or ocean spray.
8. Can chlorine from natural sources such as volcanoes reach the
stratosphere?
A) Yes, and they are the primary source
B) Yes, but they are not the primary source
C) No, natural sources cannot reach the stratosphere
D) Only during major volcanic events
Answer: B - While volcanic eruptions do release chlorine into the
atmosphere, they are not the primary source of stratospheric chlorine.
Most chlorine in the stratosphere comes from human-made
refrigerants.
9. How many ozone molecules can one molecule of chlorine destroy?
A) 1,000
B) 10,000
C) 100,000
, D) 1,000,000
Answer: C - A single chlorine molecule can destroy up to 100,000 ozone
molecules through a catalytic chain reaction, making chlorine extremely
efficient at ozone depletion.
10. How many ozone molecules can three molecules of chlorine
destroy?
A) 100,000
B) 200,000
C) 300,000
D) 400,000
Answer: C - If one chlorine molecule destroys 100,000 ozone molecules,
three chlorine molecules would destroy 300,000 ozone molecules (3 ×
100,000 = 300,000).
11. How many oxygen atoms does an ozone molecule contain?
A) 1
B) 2
C) 3
D) 4
Answer: C - Ozone (O₃) consists of three oxygen atoms bonded
together, making it a triatomic molecule.
12. Where is the majority of Earth's ozone located?
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Thermosphere
Answer: B - Approximately 90% of Earth's ozone is located in the
stratosphere, primarily between 10 and 30 miles above Earth's surface.
WITH CORRECT VERIFIED ANSWERS AND RATIONALES
1. What is the minimum passing score required for all EPA Section 608
certification exams?
A) 65%
B) 70%
C) 75%
D) 80%
Answer: B - The EPA requires a score of 70% or higher to pass any of the
Section 608 certification exams (Type I, Type II, Type III, or Universal).
This standardized passing threshold applies across all certification
levels.
2. A technician who holds a Universal certification can perform which
of the following?
A) Only service small appliances
B) Only service high-pressure systems
C) Service all types of HVACR equipment
D) Only service low-pressure systems
Answer: C - Universal certification allows technicians to work on all
types of equipment including small appliances, high-pressure systems,
low-pressure systems, and all refrigerant types covered under Section
608.
,3. How many questions are on the EPA Universal certification exam?
A) 50
B) 75
C) 100
D) 125
Answer: C - The Universal certification exam consists of 100 questions
covering all four core sections: Core, Type I, Type II, and Type III.
4. Which federal law governs refrigerant handling and technician
certification requirements?
A) Clean Water Act
B) Clean Air Act Section 608
C) Resource Conservation and Recovery Act
D) Toxic Substances Control Act
Answer: B - Section 608 of the Clean Air Act is the federal law that
establishes requirements for refrigerant handling, technician
certification, and ozone-depleting substance management.
5. A technician must stay current with which types of regulations?
A) Only federal regulations
B) Only state regulations
C) Federal, state, and local laws
D) Only international regulations
Answer: C - Technicians must comply with all applicable federal, state,
and local regulations regarding refrigerant handling, as local
jurisdictions may have additional requirements beyond federal law.
6. True or False: Ground-level ozone reflects and absorbs harmful UV
rays from the sun.
A) True
,B) False
Answer: B - Ground-level ozone is a pollutant that forms smog and is
harmful to breathe. It does not reflect or absorb UV rays; that function
is performed by stratospheric ozone located 10-30 miles above the
Earth's surface.
7. What is the primary source of chlorine found in the stratosphere?
A) Volcanic eruptions
B) Ocean spray
C) Refrigerant emissions from human activities
D) Forest fires
Answer: C - Human-made refrigerants such as CFCs and HCFCs are the
primary source of chlorine in the stratosphere, not natural sources like
volcanoes or ocean spray.
8. Can chlorine from natural sources such as volcanoes reach the
stratosphere?
A) Yes, and they are the primary source
B) Yes, but they are not the primary source
C) No, natural sources cannot reach the stratosphere
D) Only during major volcanic events
Answer: B - While volcanic eruptions do release chlorine into the
atmosphere, they are not the primary source of stratospheric chlorine.
Most chlorine in the stratosphere comes from human-made
refrigerants.
9. How many ozone molecules can one molecule of chlorine destroy?
A) 1,000
B) 10,000
C) 100,000
, D) 1,000,000
Answer: C - A single chlorine molecule can destroy up to 100,000 ozone
molecules through a catalytic chain reaction, making chlorine extremely
efficient at ozone depletion.
10. How many ozone molecules can three molecules of chlorine
destroy?
A) 100,000
B) 200,000
C) 300,000
D) 400,000
Answer: C - If one chlorine molecule destroys 100,000 ozone molecules,
three chlorine molecules would destroy 300,000 ozone molecules (3 ×
100,000 = 300,000).
11. How many oxygen atoms does an ozone molecule contain?
A) 1
B) 2
C) 3
D) 4
Answer: C - Ozone (O₃) consists of three oxygen atoms bonded
together, making it a triatomic molecule.
12. Where is the majority of Earth's ozone located?
A) Troposphere
B) Stratosphere
C) Mesosphere
D) Thermosphere
Answer: B - Approximately 90% of Earth's ozone is located in the
stratosphere, primarily between 10 and 30 miles above Earth's surface.
