Ozone layer - Study guides, Class notes & Summaries
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(Answered) EPA SECTION 608 CORE (2021-2022 revision)
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EPA SECTION 608 CORE (2021-2022 revision) 
A disposable cylinder should be reduced to what pressure before scrapping? 
a. 0 psig 
b. 20 psig 
c. 50 psig 
d. 80 psig 
 
A major system repair is being performed on a R-22 appliance. What CANNOT be done to recharge the appliance? 
a. Add R-22 after the repair is complete. 
b. Retrofit the unit to R-407C. 
c. Use recovered or recycled R-22 from the same 
owner. 
d. Top off the unit with R-410a. 
A refillable cylinder must not be filled above what ...
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OZONE layer protection; CFC Exam 2023 Questions and Answers
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ozone construction exists as 3 basic forms - Answer- o - oxygen atom 
o2 - oxygen molecule 
o3 - ozone molecule - toxic, unstable gas, protects us from UV sunlight 
 
sunlight strikes o2 molecules and splits them, the floating o atoms will "float" and come into contact with o2 to form - Answer- o3- ozone molecule 
 
the stratosphere is approx. how far away above earths surface - Answer- 15 to 50 km 
 
normally there is a balance between the ___________ and ___________ of o3 - Answer- destructi...
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Oregon State Board Exam - Esthetics (2023)Solved And Already Graded A+
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Oregon State Board Exam - Esthetics (2023)Solved And Already Graded A+ 
Oregon State Board Exam - Esthetics (2023)Solved And Already Graded A+ 
 
The muscles that respond automatically to control various body functions are: 
 
anterior 
striated 
voluntary 
non-striated - Answer non-striated 
 
Bacteria are single cells that are circular, spiral or: 
 
rod- shaped 
square-shaped 
angular-shaped 
triangular- shaped - Answer rod- shaped 
 
Disease-producing bacteria are called: 
 
virus 
microbes ...
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CFC's and the ozone layer | Questions and Correct Solutions Latest Update 2024
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CFC's and the ozone layer | Questions and 
Correct Solutions Latest Update 2024 
CFCs are organic molecules that contain 3 elements: - Answer - carbon, chlorine and fluorine 
CFCs are both non - Answer - toxic or flammable and start off unreactive 
In water CFCs are - Answer - insoluble 
CFCs have a low - Answer - boiling point 
CFCs were used in - Answer - refrigerators, air conditioning systems, propellants and aerosol spray cans 
In 1974 discovered the truth behind CFCs which was that - Answ...
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PRAXIS CRAM - BIOLOGY 5236 LATEST UPDATE GRADED A+
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PRAXIS CRAM - BIOLOGY 5236 LATEST 
 
UPDATE GRADED A+ 
 
Pros of stem cell research Curing genetic diseases 
Growing skin for burn victims 
Growing new organs 
 
Cons of stem cell research Harvesting embryonic stem cells kills the embryo, what 
constitutes a viable embryo? 
 
Cons of genetically modified foods Man should not interfere, allergens, modifications not 
contained-could pass in to wild species 
 
Cons of cloning - reduced gene pool 
- animals less healthy 
- worries that humans could ...
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EPA 609 Technician Certification (Questions and Answers, 100% Correct)
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EPA 609 Technician Certification (Questions and Answers, 100% Correct) 
1. T/F Ozone at ground level ans at Stratosphere is a harmful pollutant 
FALSE 
2. For determining the Ozone Depletion Potential __________ having been 
assigned a factor of 1 
CFC-11 
3. Ozone layer absorbs and scatters __________ form the sun 
Ultraviolet light 
4. T/F R-134 is a chlorine-free refrigerant 
TRUE 
5. a refillable refrigerant cylinder must not be filled above _________ of its full 
capacity 
80% 
6. T/F Est...
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EPA 608 CORE TEST EXAM 2024 WITH 100% CORRECT ANSWERS
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As of what date did it become unlawful to release Class 1 and Class II 
refrigerants to the atmosphere? 
a. July 1, 1992 
b. July 1, 1993 
c. November 14, 1994 
d. January 1, 1996 - correct answer a. July 1, 1992 
 
What is the ozone layer and why is it important to us on Earth? 
a. Thin layer of R-22 in the atmosphere that filters UV. 
b. Protective shield for Earth from the sun's harmful ultraviolent (UV) 
rays in the stratosphere layer that extends about 6 to 30 miles above 
earth 
c. Thin l...
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EPA 608 Core Test Sample Questions | 100% Correct Answers | Verified | Latest 2024 Version
- Exam (elaborations) • 80 pages • 2024
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As of what date did it become unlawful to release Class 1 and Class II 
refrigerants to the atmosphere? 
a. July 1, 1992 
b. July 1, 1993 
c. November 14, 1994 
d. January 1, 1996 - a. July 1, 1992 
What is the ozone layer and why is it important to us on Earth? 
a. Thin layer of R-22 in the atmosphere that filters UV. 
b. Protective shield for Earth from the sun's harmful ultraviolent (UV) 
rays in the stratosphere layer that extends about 6 to 30 miles above 
earth 
c. Thin layer of CFC and H...
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C6e: Depletion of the ozone layer Questions and Answers 2023
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C6e: Depletion of the ozone layer Questions and Answers 2023 
Explain why the use of CFCs has been banned in the 
UK 
• society has agreed with scientists' views that 
CFCs deplete the ozone layer. 
 
 
 
Describe and explain how scientists' attitude to CFCs 
has changed: 
• initial enthusiasm for the use of CFCs based upon 
their inertness 
• later discovery of ozone depletion and link to 
presence of CFCs 
• acceptance by scientists and the rest of the 
world community that the use o...
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EPA 608 Core Test Sample Questions | Verified | Latest Update 2024
- Exam (elaborations) • 80 pages • 2024
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As of what date did it become unlawful to release Class 1 and Class II 
refrigerants to the atmosphere? 
a. July 1, 1992 
b. July 1, 1993 
c. November 14, 1994 
d. January 1, 1996 - a. July 1, 1992 
What is the ozone layer and why is it important to us on Earth? 
a. Thin layer of R-22 in the atmosphere that filters UV. 
b. Protective shield for Earth from the sun's harmful ultraviolent (UV) 
rays in the stratosphere layer that extends about 6 to 30 miles above 
earth 
c. Thin layer of CFC and H...
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