EPA 608 SkillCat Exam Prep Test Bank 2026-2027
with 350+ Recently Test Questions and Correct
Answers with Rationales/ SKILLCAT EPA 608 Exam
Prep 2026-2027 (New!)
1: As environmental technicians, we must be up to date with which types of laws?
A) Federal laws only
B) State laws only
C) Local laws only
D) Federal, State and Local laws -ANSWER- D) Federal, State and Local laws
Rationale: Environmental technicians must comply with all levels of government
regulations: federal (EPA), state, and local laws, as they all apply to handling
refrigerants and environmental protection.
2: For the EPA 608 Universal Certification, how many questions will you receive?
A) 50
B) 75
C) 100
D) 150 -ANSWER- C) 100
Rationale: The EPA 608 Universal Certification exam consists of 100 total
questions: 25 Core questions plus 25 questions from each of the three specialty
sections (Type I, Type II, and Type III).
3: If you need to get Type III certification, which of the following will be on your
exam?
A) 25 questions total
B) 50 questions. 25 Core questions & 25 Type III questions
C) 75 questions total
D) 100 questions total -ANSWER- B) 50 questions. 25 Core questions & 25 Type
III questions
Rationale: Type III certification requires passing the Core section (25 questions)
and the Type III specialty section (25 questions), for a total of 50 questions.
1
,4: What is the passing grade for all EPA certifications?
A) 60%
B) 70%
C) 75%
D) 80% -ANSWER- B) 70%
Rationale: The EPA requires a minimum score of 70% to pass any of the Section
608 certification exams (Core, Type I, Type II, Type III, or Universal).
5: Once you pass the EPA exam, the regulations you learned will never change.
A) True
B) False -ANSWER- B) False
Rationale: EPA regulations are updated periodically as new scientific information
becomes available and as international agreements (like the Montreal Protocol)
evolve. Technicians must stay current with changes.
6: Do natural events like volcanic eruptions contribute to chlorine in the
stratosphere?
A) Yes. Can come from natural sources such as volcanoes but are not the primary
source
B) No, only human-made sources contribute chlorine
C) Yes, and they are the primary source
D) No, natural events do not produce chlorine -ANSWER- A) Yes. Can come from
natural sources such as volcanoes but are not the primary source
Rationale: Volcanic eruptions do release chlorine into the stratosphere, but
human-made CFCs and HCFCs are the primary source of ozone-depleting
chlorine.
7: Ground level ozone is what absorbs and reflects harmful UV rays from the sun.
A) True
B) False -ANSWER- B) False
Rationale: Stratospheric ozone (not ground-level ozone) absorbs and reflects
harmful UV rays. Ground-level ozone is a pollutant and component of smog.
8: In which of the following ways does ozone depletion affect humans?
A) Decreased risk of skin cancer
B) Increased risk of skin cancer and cataracts
C) Increased risk of heart disease
D) Decreased risk of cataracts -ANSWER- B) Increased risk of skin cancer and
cataracts
2
,Rationale: Ozone depletion allows more UV-B radiation to reach the Earth's
surface, increasing the risk of skin cancer, cataracts, and immune system
suppression in humans.
9: Is there evidence that refrigerants are in the stratosphere?
A) Yes
B) No -ANSWER- A) Yes
Rationale: Scientific measurements have detected CFCs, HCFCs, and other
refrigerants in the stratosphere, confirming that these chemicals reach the ozone
layer.
10: Which of the following statements is TRUE about chlorine?
A) A single chlorine atom can survive in the atmosphere for only a few hours
B) A single chlorine atom can survive in the atmosphere for years
C) Chlorine atoms are destroyed immediately upon reaching the stratosphere
D) Chlorine atoms do not react with ozone -ANSWER- B) A single chlorine atom
can survive in the atmosphere for years
Rationale: A single chlorine atom can remain in the stratosphere for many years,
acting as a catalyst to destroy thousands of ozone molecules before being removed.
11: Ozone has __ atoms of oxygen.
A) 1
B) 2
C) 3
D) 4 -ANSWER- C) 3
Rationale: Ozone (O3) is a molecule composed of three oxygen atoms. Oxygen
gas (O2) has two atoms.
12: The majority of ozone is located in the Troposphere.
A) True
B) False -ANSWER- B) False
Rationale: The majority of Earth's ozone (about 90%) is located in the
stratosphere, not the troposphere. The stratospheric ozone layer protects life from
UV radiation.
13: How many molecules of ozone can three molecules of chlorine destroy?
A) 3
B) 300
C) 3,000
D) 300,000 -ANSWER- D) 300,000
3
, Rationale: One chlorine atom can destroy up to 100,000 ozone molecules. Three
chlorine atoms can destroy approximately 300,000 ozone molecules through
catalytic chain reactions.
14: What is the major function of ozone in the stratosphere?
A) Absorb and reflect UV rays from the sun
B) Trap heat in the atmosphere
C) Produce oxygen for breathing
D) Filter out visible light -ANSWER- A) Absorb and reflect UV rays from the sun
Rationale: The stratospheric ozone layer absorbs and reflects most of the sun's
harmful ultraviolet (UV) radiation, protecting life on Earth.
15: What is the primary source of chlorine in the Stratosphere?
A) Volcanic eruptions
B) Ocean salt spray
C) Emissions of refrigerant chemicals such as CFCs and HCFCs by humans
D) Forest fires -ANSWER- C) Emissions of refrigerant chemicals such as CFCs
and HCFCs by humans
Rationale: Human-made CFCs and HCFCs (used as refrigerants, solvents, and
propellants) are the primary source of chlorine in the stratosphere.
16: What molecule destroys the ozone layer?
A) Oxygen
B) Nitrogen
C) Chlorine
D) Hydrogen -ANSWER- C) Chlorine
Rationale: Chlorine atoms act as catalysts in the destruction of ozone molecules.
When released from CFCs and HCFCs in the stratosphere, chlorine reacts with
ozone (O3) to form oxygen (O2) and chlorine monoxide (ClO).
17: Which of the following are effects of ozone depletion?
A) Decreasing crop yields
B) Increased plant growth
C) Increased rainfall
D) Decreased temperatures -ANSWER- A) Decreasing crop yields
Rationale: Ozone depletion leads to increased UV radiation, which can damage
plant tissues, reduce photosynthesis, and decrease crop yields.
18: Which refrigerant chemicals are responsible for the destruction of the ozone
layer?
4
with 350+ Recently Test Questions and Correct
Answers with Rationales/ SKILLCAT EPA 608 Exam
Prep 2026-2027 (New!)
1: As environmental technicians, we must be up to date with which types of laws?
A) Federal laws only
B) State laws only
C) Local laws only
D) Federal, State and Local laws -ANSWER- D) Federal, State and Local laws
Rationale: Environmental technicians must comply with all levels of government
regulations: federal (EPA), state, and local laws, as they all apply to handling
refrigerants and environmental protection.
2: For the EPA 608 Universal Certification, how many questions will you receive?
A) 50
B) 75
C) 100
D) 150 -ANSWER- C) 100
Rationale: The EPA 608 Universal Certification exam consists of 100 total
questions: 25 Core questions plus 25 questions from each of the three specialty
sections (Type I, Type II, and Type III).
3: If you need to get Type III certification, which of the following will be on your
exam?
A) 25 questions total
B) 50 questions. 25 Core questions & 25 Type III questions
C) 75 questions total
D) 100 questions total -ANSWER- B) 50 questions. 25 Core questions & 25 Type
III questions
Rationale: Type III certification requires passing the Core section (25 questions)
and the Type III specialty section (25 questions), for a total of 50 questions.
1
,4: What is the passing grade for all EPA certifications?
A) 60%
B) 70%
C) 75%
D) 80% -ANSWER- B) 70%
Rationale: The EPA requires a minimum score of 70% to pass any of the Section
608 certification exams (Core, Type I, Type II, Type III, or Universal).
5: Once you pass the EPA exam, the regulations you learned will never change.
A) True
B) False -ANSWER- B) False
Rationale: EPA regulations are updated periodically as new scientific information
becomes available and as international agreements (like the Montreal Protocol)
evolve. Technicians must stay current with changes.
6: Do natural events like volcanic eruptions contribute to chlorine in the
stratosphere?
A) Yes. Can come from natural sources such as volcanoes but are not the primary
source
B) No, only human-made sources contribute chlorine
C) Yes, and they are the primary source
D) No, natural events do not produce chlorine -ANSWER- A) Yes. Can come from
natural sources such as volcanoes but are not the primary source
Rationale: Volcanic eruptions do release chlorine into the stratosphere, but
human-made CFCs and HCFCs are the primary source of ozone-depleting
chlorine.
7: Ground level ozone is what absorbs and reflects harmful UV rays from the sun.
A) True
B) False -ANSWER- B) False
Rationale: Stratospheric ozone (not ground-level ozone) absorbs and reflects
harmful UV rays. Ground-level ozone is a pollutant and component of smog.
8: In which of the following ways does ozone depletion affect humans?
A) Decreased risk of skin cancer
B) Increased risk of skin cancer and cataracts
C) Increased risk of heart disease
D) Decreased risk of cataracts -ANSWER- B) Increased risk of skin cancer and
cataracts
2
,Rationale: Ozone depletion allows more UV-B radiation to reach the Earth's
surface, increasing the risk of skin cancer, cataracts, and immune system
suppression in humans.
9: Is there evidence that refrigerants are in the stratosphere?
A) Yes
B) No -ANSWER- A) Yes
Rationale: Scientific measurements have detected CFCs, HCFCs, and other
refrigerants in the stratosphere, confirming that these chemicals reach the ozone
layer.
10: Which of the following statements is TRUE about chlorine?
A) A single chlorine atom can survive in the atmosphere for only a few hours
B) A single chlorine atom can survive in the atmosphere for years
C) Chlorine atoms are destroyed immediately upon reaching the stratosphere
D) Chlorine atoms do not react with ozone -ANSWER- B) A single chlorine atom
can survive in the atmosphere for years
Rationale: A single chlorine atom can remain in the stratosphere for many years,
acting as a catalyst to destroy thousands of ozone molecules before being removed.
11: Ozone has __ atoms of oxygen.
A) 1
B) 2
C) 3
D) 4 -ANSWER- C) 3
Rationale: Ozone (O3) is a molecule composed of three oxygen atoms. Oxygen
gas (O2) has two atoms.
12: The majority of ozone is located in the Troposphere.
A) True
B) False -ANSWER- B) False
Rationale: The majority of Earth's ozone (about 90%) is located in the
stratosphere, not the troposphere. The stratospheric ozone layer protects life from
UV radiation.
13: How many molecules of ozone can three molecules of chlorine destroy?
A) 3
B) 300
C) 3,000
D) 300,000 -ANSWER- D) 300,000
3
, Rationale: One chlorine atom can destroy up to 100,000 ozone molecules. Three
chlorine atoms can destroy approximately 300,000 ozone molecules through
catalytic chain reactions.
14: What is the major function of ozone in the stratosphere?
A) Absorb and reflect UV rays from the sun
B) Trap heat in the atmosphere
C) Produce oxygen for breathing
D) Filter out visible light -ANSWER- A) Absorb and reflect UV rays from the sun
Rationale: The stratospheric ozone layer absorbs and reflects most of the sun's
harmful ultraviolet (UV) radiation, protecting life on Earth.
15: What is the primary source of chlorine in the Stratosphere?
A) Volcanic eruptions
B) Ocean salt spray
C) Emissions of refrigerant chemicals such as CFCs and HCFCs by humans
D) Forest fires -ANSWER- C) Emissions of refrigerant chemicals such as CFCs
and HCFCs by humans
Rationale: Human-made CFCs and HCFCs (used as refrigerants, solvents, and
propellants) are the primary source of chlorine in the stratosphere.
16: What molecule destroys the ozone layer?
A) Oxygen
B) Nitrogen
C) Chlorine
D) Hydrogen -ANSWER- C) Chlorine
Rationale: Chlorine atoms act as catalysts in the destruction of ozone molecules.
When released from CFCs and HCFCs in the stratosphere, chlorine reacts with
ozone (O3) to form oxygen (O2) and chlorine monoxide (ClO).
17: Which of the following are effects of ozone depletion?
A) Decreasing crop yields
B) Increased plant growth
C) Increased rainfall
D) Decreased temperatures -ANSWER- A) Decreasing crop yields
Rationale: Ozone depletion leads to increased UV radiation, which can damage
plant tissues, reduce photosynthesis, and decrease crop yields.
18: Which refrigerant chemicals are responsible for the destruction of the ozone
layer?
4
