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Question 1 of 16
1. Question
1 points
Halons used in fire extinguishers which contain ______ atoms:
Correct
Halons used in fire extinguishers contain bromine atoms. The presence of bromine atoms in halons gives them their fire suppression capabilities. Bromine is highly reactive and can disrupt the chain reactions that occur during combustion, effectively suppressing the fire.
Incorrect
Halons used in fire extinguishers contain bromine atoms. The presence of bromine atoms in halons gives them their fire suppression capabilities. Bromine is highly reactive and can disrupt the chain reactions that occur during combustion, effectively suppressing the fire.
Question 2 of 16
2. Question
1 points
Halons have ______ ozone depletion potential (ODP) compared to CFCs:
Correct
Halons are used in fire extinguishers which contain Bromine atoms. Halons, which contain bromine atoms, have higher ODP values because bromine is more reactive than chlorine, which is present in CFCs.
Incorrect
Halons are used in fire extinguishers which contain Bromine atoms. Halons, which contain bromine atoms, have higher ODP values because bromine is more reactive than chlorine, which is present in CFCs.
Question 3 of 16
3. Question
1 points
By _______, R-22 (HCFC) refrigerant will no longer be produced or imported.
Correct
Incorrect
Question 4 of 16
4. Question
1 points
CFCs have atmospheric lifetimes ranging from over ______ :
Correct
CFCs have long atmospheric lifetimes due to their stability and low reactivity in the lower atmosphere (troposphere) raging from decades to centuries. They are relatively inert and do not readily undergo chemical reactions that break them down. Once reaches Stratosphere, it can be broken down by high-energy UV radiation from the Sun releasing chlorine atoms resulting in the depletion of the Ozone layer.
Incorrect
CFCs have long atmospheric lifetimes due to their stability and low reactivity in the lower atmosphere (troposphere) raging from decades to centuries. They are relatively inert and do not readily undergo chemical reactions that break them down. Once reaches Stratosphere, it can be broken down by high-energy UV radiation from the Sun releasing chlorine atoms resulting in the depletion of the Ozone layer.
Question 5 of 16
5. Question
1 points
Number of countries signed Montreal Protocol is _____ :
Correct
Incorrect
Question 6 of 16
6. Question
1 points
Which of the following is an agricultural fumigant that has significant ozone depletion potential:
Correct
Methyl bromide (CH3Br) is an agricultural fumigant that has a significant ozone depletion potential (ODP). It is commonly used for soil fumigation to control pests, pathogens, and weeds in agricultural practices. Methyl bromide is an ozone-depleting substance primarily due to the bromine atoms it contains.
Incorrect
Methyl bromide (CH3Br) is an agricultural fumigant that has a significant ozone depletion potential (ODP). It is commonly used for soil fumigation to control pests, pathogens, and weeds in agricultural practices. Methyl bromide is an ozone-depleting substance primarily due to the bromine atoms it contains.
Question 7 of 16
7. Question
1 points
Production of Halons were phased out by ______ :
Correct
Incorrect
Question 8 of 16
8. Question
1 points
The severe ozone depletion known as the “ozone hole” exist in which of the following continent:
Correct
The “ozone hole” primarily exists over the continent of Antarctica. The unique atmospheric and meteorological conditions over Antarctica, including the presence of polar stratospheric clouds and extremely low temperatures, contribute to the formation of the ozone hole.
Incorrect
The “ozone hole” primarily exists over the continent of Antarctica. The unique atmospheric and meteorological conditions over Antarctica, including the presence of polar stratospheric clouds and extremely low temperatures, contribute to the formation of the ozone hole.
Question 9 of 16
9. Question
1 points
Which of the following atoms cause significant depletion of the ozone layer:
Correct
Ozone-depleting substances are released into the atmosphere, once they reach the stratosphere, these substances are broken down by high-energy UV radiation, releasing chlorine and bromine atoms. The chlorine and bromine atoms act as catalysts in ozone depletion reactions.
Incorrect
Ozone-depleting substances are released into the atmosphere, once they reach the stratosphere, these substances are broken down by high-energy UV radiation, releasing chlorine and bromine atoms. The chlorine and bromine atoms act as catalysts in ozone depletion reactions.
Question 10 of 16
10. Question
1 points
Ozone present in which of the layer in earth’s atmosphere is considered as pollutant and is not desirable:
Correct
Ozone present in Stratosphere shields harmful UV light from reaching Earth’s surface. However, Ozone is formed in Troposphere by chemical interactions between Nitrous Oxide and Volatile Organic Compounds in the presence of Sunlight. These reactions occur in the presence of pollutants emitted by human activities such as industrial processes, vehicle emissions, and certain natural sources
Incorrect
Ozone present in Stratosphere shields harmful UV light from reaching Earth’s surface. However, Ozone is formed in Troposphere by chemical interactions between Nitrous Oxide and Volatile Organic Compounds in the presence of Sunlight. These reactions occur in the presence of pollutants emitted by human activities such as industrial processes, vehicle emissions, and certain natural sources
Question 11 of 16
11. Question
1 points
Ozone depletion potential (ODP) for HCFCs will be in the range of:
Correct
ODP is a measure of a substance’s potential to deplete the ozone layer when compared to the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.
HCFCs have ODP values ranging from 0.01 to 0.1. HFCs have an ODP of zero. CFCs have relatively high ODP values, having ODPs of 1.0
Incorrect
ODP is a measure of a substance’s potential to deplete the ozone layer when compared to the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.
HCFCs have ODP values ranging from 0.01 to 0.1. HFCs have an ODP of zero. CFCs have relatively high ODP values, having ODPs of 1.0
Question 12 of 16
12. Question
1 points
Which of the following refrigerant is most common alternative to R-22 (HCFC):
Correct
R-410A is a hydrofluorocarbon (HFC) refrigerant commonly used in air conditioning and heat pump systems. It is an alternative to HCFC-22 (R-22), which is being phased out due to its ozone-depleting potential. R-410A has become widely used in residential and commercial cooling applications.
Incorrect
R-410A is a hydrofluorocarbon (HFC) refrigerant commonly used in air conditioning and heat pump systems. It is an alternative to HCFC-22 (R-22), which is being phased out due to its ozone-depleting potential. R-410A has become widely used in residential and commercial cooling applications.
Question 13 of 16
13. Question
1 points
Production of Methyl Bromide is phased out by _____:
Correct
Incorrect
Question 14 of 16
14. Question
1 points
After _____ , only recovered, recycled, or reclaimed supplies of R-22 will be available.
Correct
Incorrect
Question 15 of 16
15. Question
1 points
Which of the following substance has the Ozone Depletion Potential (ODP) greater than 1:
Correct
The ozone depletion potential (ODP) of carbon tetrachloride (CCl4) is 1.1. This means that carbon tetrachloride has a higher ozone depletion potential than the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.
Incorrect
The ozone depletion potential (ODP) of carbon tetrachloride (CCl4) is 1.1. This means that carbon tetrachloride has a higher ozone depletion potential than the reference substance, chlorofluorocarbon-11 (CFC-11), which has an ODP of 1.0.
Question 16 of 16
16. Question
1 points
HFCs substances have zero ozone depletion potential and zero global warming potential:
Correct
HFC (R-410A) has a GWP of 2,088 over a 100-year time horizon. This means that over a 100-year period, R-410A has a warming potential 2,088 times greater than an equivalent mass of carbon dioxide. Other HFCs also have high GWP values, typically in the range of several hundred to several thousand.
Incorrect
HFC (R-410A) has a GWP of 2,088 over a 100-year time horizon. This means that over a 100-year period, R-410A has a warming potential 2,088 times greater than an equivalent mass of carbon dioxide. Other HFCs also have high GWP values, typically in the range of several hundred to several thousand.
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