EPA 608 PRACTICE EXAM – NEWEST 2026 With Questions
and Correct (Verified) Answers | Latest Update 2026/2027 |
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1. As environmental technicians, we must be up to date with which type of laws?
A. Federal laws only
B. State laws only
C. Local laws only
D. Federal, State, and Local Laws
CORRECT ANSWER: D. Federal, State, and Local Laws
Rationale: Environmental technicians must comply with all applicable regulations at every level of
government. Federal laws such as the Clean Air Act set the minimum standards, while state and local
regulations may be stricter. Ignorance of any level of law is not a defense, so technicians must stay
current with all three.
2. For EPA 608 Universal Certification, how many questions will you receive?
A. 50
B. 75
C. 100
D. 125
CORRECT ANSWER: C. 100
Rationale: The EPA 608 Universal Certification exam consists of 100 questions total: 25 Core
questions plus 25 questions from each of the three Type sections (Type I, Type II, and Type III), for a
total of 100 questions. A passing score of 70% is required.
3. If you need to get Type III certification, what will be on your exam?
A. 25 questions, all core
B. 50 questions, 25 core and 25 Type III questions
C. 75 questions, 25 core and 50 Type III questions
D. 100 questions, 25 core and 75 Type III questions
CORRECT ANSWER: B. 50 questions, 25 core and 25 Type III questions
,Rationale: Each individual Type certification exam (Type I, Type II, or Type III) consists of 50
questions: 25 Core questions that are common to all exams, plus 25 questions specific to that Type.
To earn Universal certification, a technician must pass all three Type exams plus the Core.
4. What is the passing grade for all EPA certifications?
A. 60%
B. 70%
C. 80%
D. 90%
CORRECT ANSWER: B. 70%
Rationale: The EPA requires a minimum passing score of 70% on each section of the Section 608
certification exam. This applies to the Core section as well as each Type section. Failing any section
requires retaking that portion of the exam.
5. Once you pass the EPA exam, the regulations you learn will never change.
A. True
B. False
CORRECT ANSWER: B. False
Rationale: EPA regulations are periodically updated and revised. New refrigerants are introduced,
phase-out dates change, and new rules are implemented. Technicians must stay informed of
regulatory changes throughout their careers to remain compliant.
6. Do natural events like volcanic eruptions contribute to chlorine in the stratosphere?
A. No, only human-made chemicals contribute chlorine
B. Yes, but they are not the primary source
C. Yes, and they are the primary source
D. No, volcanic eruptions release only sulfur compounds
CORRECT ANSWER: B. Yes, but they are not the primary source
Rationale: Volcanic eruptions do release some chlorine compounds into the atmosphere. However,
the vast majority of ozone-depleting chlorine in the stratosphere comes from human-made CFCs and
HCFCs. Natural sources are minor contributors compared to anthropogenic emissions.
7. True or False: Ground level ozone is what absorbs and reflects harmful UV rays from the sun.
A. True
B. False
CORRECT ANSWER: B. False
,Rationale: Ground-level ozone (tropospheric ozone) is a component of smog and is harmful to
human health and vegetation. It is stratospheric ozone (the ozone layer) that absorbs and reflects
harmful UV radiation from the sun. These are two distinct layers of the atmosphere with different
functions.
8. In which of the following ways does ozone depletion affect humans?
A. Increased risk of skin cancer and cataracts
B. Decreased risk of skin cancer
C. Improved crop yields
D. Reduced exposure to UV radiation
CORRECT ANSWER: A. Increased risk of skin cancer and cataracts
Rationale: When the ozone layer is depleted, more UV radiation reaches the Earth's surface.
Increased UV exposure is linked to higher rates of skin cancer, cataracts, and immune system
suppression in humans. It also negatively affects crops, marine life, and materials.
9. Is there evidence that refrigerants are in the stratosphere?
A. Yes
B. No
C. Only in the Arctic
D. Only in the Antarctic
CORRECT ANSWER: A. Yes
Rationale: Scientific measurements have confirmed the presence of CFCs, HCFCs, and other
refrigerants in the stratosphere. These chemicals are stable enough to survive transport from the
troposphere to the stratosphere, where they break down and release chlorine atoms that destroy
ozone.
10. Which of the following statements is TRUE about chlorine?
A. A single chlorine atom can survive in the atmosphere for years
B. Chlorine atoms are destroyed immediately upon release
C. Chlorine atoms only exist in liquid form
D. Chlorine atoms cannot reach the stratosphere
CORRECT ANSWER: A. A single chlorine atom can survive in the atmosphere for years
Rationale: Once a chlorine atom is released from a CFC or HCFC molecule in the stratosphere, it can
remain active for years, repeatedly destroying ozone molecules. A single chlorine atom can destroy
thousands of ozone molecules before it is eventually removed from the stratosphere.
11. Ozone has _ atoms of oxygen.
, A. 1
B. 2
C. 3
D. 4
CORRECT ANSWER: C. 3
Rationale: Ozone (O₃) is a molecule composed of three oxygen atoms. This distinguishes it from
molecular oxygen (O₂), which has two oxygen atoms. The three-atom structure of ozone is what
allows it to absorb UV radiation.
12. The majority of ozone is located in the Troposphere.
A. True
B. False
CORRECT ANSWER: B. False
Rationale: The majority of atmospheric ozone (about 90%) is located in the stratosphere, specifically
in the ozone layer. The troposphere, where we live and breathe, contains only a small fraction of
total atmospheric ozone. Stratospheric ozone is essential for filtering UV radiation.
13. How many molecules of ozone can three molecules of chlorine destroy?
A. 100,000
B. 200,000
C. 300,000
D. 400,000
CORRECT ANSWER: C. 300,000 (100,000 per chlorine molecule)
Rationale: Each chlorine atom can destroy approximately 100,000 ozone molecules through a
catalytic cycle. Therefore, three chlorine atoms can destroy approximately 300,000 ozone molecules.
This catalytic destruction process is why even small amounts of chlorine in the stratosphere are so
damaging.
14. What is the major function of ozone in the stratosphere?
A. Absorb and reflect UV rays from the sun
B. Absorb carbon dioxide
C. Produce oxygen for breathing
D. Reflect infrared radiation
CORRECT ANSWER: A. Absorb and reflect UV rays from the sun
Rationale: Stratospheric ozone acts as a shield that absorbs and reflects harmful ultraviolet (UV)
radiation from the sun. This protects living organisms on Earth from UV-induced damage such as skin
cancer, cataracts, and DNA damage. Without this ozone layer, life as we know it would not be
possible.
and Correct (Verified) Answers | Latest Update 2026/2027 |
Already Graded A+ | Guaranteed Success | Brand New
Version
1. As environmental technicians, we must be up to date with which type of laws?
A. Federal laws only
B. State laws only
C. Local laws only
D. Federal, State, and Local Laws
CORRECT ANSWER: D. Federal, State, and Local Laws
Rationale: Environmental technicians must comply with all applicable regulations at every level of
government. Federal laws such as the Clean Air Act set the minimum standards, while state and local
regulations may be stricter. Ignorance of any level of law is not a defense, so technicians must stay
current with all three.
2. For EPA 608 Universal Certification, how many questions will you receive?
A. 50
B. 75
C. 100
D. 125
CORRECT ANSWER: C. 100
Rationale: The EPA 608 Universal Certification exam consists of 100 questions total: 25 Core
questions plus 25 questions from each of the three Type sections (Type I, Type II, and Type III), for a
total of 100 questions. A passing score of 70% is required.
3. If you need to get Type III certification, what will be on your exam?
A. 25 questions, all core
B. 50 questions, 25 core and 25 Type III questions
C. 75 questions, 25 core and 50 Type III questions
D. 100 questions, 25 core and 75 Type III questions
CORRECT ANSWER: B. 50 questions, 25 core and 25 Type III questions
,Rationale: Each individual Type certification exam (Type I, Type II, or Type III) consists of 50
questions: 25 Core questions that are common to all exams, plus 25 questions specific to that Type.
To earn Universal certification, a technician must pass all three Type exams plus the Core.
4. What is the passing grade for all EPA certifications?
A. 60%
B. 70%
C. 80%
D. 90%
CORRECT ANSWER: B. 70%
Rationale: The EPA requires a minimum passing score of 70% on each section of the Section 608
certification exam. This applies to the Core section as well as each Type section. Failing any section
requires retaking that portion of the exam.
5. Once you pass the EPA exam, the regulations you learn will never change.
A. True
B. False
CORRECT ANSWER: B. False
Rationale: EPA regulations are periodically updated and revised. New refrigerants are introduced,
phase-out dates change, and new rules are implemented. Technicians must stay informed of
regulatory changes throughout their careers to remain compliant.
6. Do natural events like volcanic eruptions contribute to chlorine in the stratosphere?
A. No, only human-made chemicals contribute chlorine
B. Yes, but they are not the primary source
C. Yes, and they are the primary source
D. No, volcanic eruptions release only sulfur compounds
CORRECT ANSWER: B. Yes, but they are not the primary source
Rationale: Volcanic eruptions do release some chlorine compounds into the atmosphere. However,
the vast majority of ozone-depleting chlorine in the stratosphere comes from human-made CFCs and
HCFCs. Natural sources are minor contributors compared to anthropogenic emissions.
7. True or False: Ground level ozone is what absorbs and reflects harmful UV rays from the sun.
A. True
B. False
CORRECT ANSWER: B. False
,Rationale: Ground-level ozone (tropospheric ozone) is a component of smog and is harmful to
human health and vegetation. It is stratospheric ozone (the ozone layer) that absorbs and reflects
harmful UV radiation from the sun. These are two distinct layers of the atmosphere with different
functions.
8. In which of the following ways does ozone depletion affect humans?
A. Increased risk of skin cancer and cataracts
B. Decreased risk of skin cancer
C. Improved crop yields
D. Reduced exposure to UV radiation
CORRECT ANSWER: A. Increased risk of skin cancer and cataracts
Rationale: When the ozone layer is depleted, more UV radiation reaches the Earth's surface.
Increased UV exposure is linked to higher rates of skin cancer, cataracts, and immune system
suppression in humans. It also negatively affects crops, marine life, and materials.
9. Is there evidence that refrigerants are in the stratosphere?
A. Yes
B. No
C. Only in the Arctic
D. Only in the Antarctic
CORRECT ANSWER: A. Yes
Rationale: Scientific measurements have confirmed the presence of CFCs, HCFCs, and other
refrigerants in the stratosphere. These chemicals are stable enough to survive transport from the
troposphere to the stratosphere, where they break down and release chlorine atoms that destroy
ozone.
10. Which of the following statements is TRUE about chlorine?
A. A single chlorine atom can survive in the atmosphere for years
B. Chlorine atoms are destroyed immediately upon release
C. Chlorine atoms only exist in liquid form
D. Chlorine atoms cannot reach the stratosphere
CORRECT ANSWER: A. A single chlorine atom can survive in the atmosphere for years
Rationale: Once a chlorine atom is released from a CFC or HCFC molecule in the stratosphere, it can
remain active for years, repeatedly destroying ozone molecules. A single chlorine atom can destroy
thousands of ozone molecules before it is eventually removed from the stratosphere.
11. Ozone has _ atoms of oxygen.
, A. 1
B. 2
C. 3
D. 4
CORRECT ANSWER: C. 3
Rationale: Ozone (O₃) is a molecule composed of three oxygen atoms. This distinguishes it from
molecular oxygen (O₂), which has two oxygen atoms. The three-atom structure of ozone is what
allows it to absorb UV radiation.
12. The majority of ozone is located in the Troposphere.
A. True
B. False
CORRECT ANSWER: B. False
Rationale: The majority of atmospheric ozone (about 90%) is located in the stratosphere, specifically
in the ozone layer. The troposphere, where we live and breathe, contains only a small fraction of
total atmospheric ozone. Stratospheric ozone is essential for filtering UV radiation.
13. How many molecules of ozone can three molecules of chlorine destroy?
A. 100,000
B. 200,000
C. 300,000
D. 400,000
CORRECT ANSWER: C. 300,000 (100,000 per chlorine molecule)
Rationale: Each chlorine atom can destroy approximately 100,000 ozone molecules through a
catalytic cycle. Therefore, three chlorine atoms can destroy approximately 300,000 ozone molecules.
This catalytic destruction process is why even small amounts of chlorine in the stratosphere are so
damaging.
14. What is the major function of ozone in the stratosphere?
A. Absorb and reflect UV rays from the sun
B. Absorb carbon dioxide
C. Produce oxygen for breathing
D. Reflect infrared radiation
CORRECT ANSWER: A. Absorb and reflect UV rays from the sun
Rationale: Stratospheric ozone acts as a shield that absorbs and reflects harmful ultraviolet (UV)
radiation from the sun. This protects living organisms on Earth from UV-induced damage such as skin
cancer, cataracts, and DNA damage. Without this ozone layer, life as we know it would not be
possible.
