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EPA 608 Core exam questions answers 11
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Question 1 of 15
1. Question
1 pointsRecovery cylinders are not specifically designed to be refilled
Correct
Disposable Cylinders are used with Virgin or Reclaimed Refrigerants
Incorrect
Disposable Cylinders are used with Virgin or Reclaimed Refrigerants
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Question 2 of 15
2. Question
1 pointsHygroscopic oil has a high affinity for water
Correct
Hydroscopic oil has high affinity towards water/moisture. At higher temperature water content in the refrigeration oil and refrigerant reacts forming acids which can damage the refrigeration system equipment. Synthetic oils, Polyalkylene glycol (PAG) and Polyolester (POE) are highly hydroscopic and readily absorbs moisture/water. So greater care should be taken while handling these refrigeration oils so that very minimum exposure is made to the atmosphere.
Incorrect
Hydroscopic oil has high affinity towards water/moisture. At higher temperature water content in the refrigeration oil and refrigerant reacts forming acids which can damage the refrigeration system equipment. Synthetic oils, Polyalkylene glycol (PAG) and Polyolester (POE) are highly hydroscopic and readily absorbs moisture/water. So greater care should be taken while handling these refrigeration oils so that very minimum exposure is made to the atmosphere.
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Question 3 of 15
3. Question
1 pointsAs per the Montreal Protocol, CFC’s were phased out of production on _____:
Correct
When virgin supplies of CFCs are depleted, future supplies from recycled, recovered and reclaimed refrigerants
Incorrect
When virgin supplies of CFCs are depleted, future supplies from recycled, recovered and reclaimed refrigerants
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Question 4 of 15
4. Question
1 pointsA single Chlorine atom can destroy ______ Ozone molecules
Correct
Incorrect
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Question 5 of 15
5. Question
1 pointsR-134A have _______ Ozone Depletion Potential
Correct
R-134a is HFC refrigerant. HFC refrigerant will have zero ODP. However HFC refrigerants contributes to global warming (green house gases)
Incorrect
R-134a is HFC refrigerant. HFC refrigerant will have zero ODP. However HFC refrigerants contributes to global warming (green house gases)
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Question 6 of 15
6. Question
1 pointsHeated refrigeration system during evacuation will ______ dehydration time
Correct
Incorrect
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Question 7 of 15
7. Question
1 pointsStrong odor is detected during the recovery process represent burn-out of which of the following:
Correct
Incorrect
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Question 8 of 15
8. Question
1 pointsReclaimed refrigerant must meet the standard set forth in _____ before it can be resold
Correct
ARI 700 is the purity standard set by Air Conditioning & Refrigeration Institute (ARI) to ensure refrigerant is free from contaminants that can damage the air conditioning & refrigeration equipment.
Incorrect
ARI 700 is the purity standard set by Air Conditioning & Refrigeration Institute (ARI) to ensure refrigerant is free from contaminants that can damage the air conditioning & refrigeration equipment.
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Question 9 of 15
9. Question
1 pointsOzone helps in maintaining stable earth temperature
Correct
Stratospheric ozone absorbs the harmful UV radiation from sun and prevent it from reaching lower levels of atmosphere. Depletion in ozone layer results in UV radiation reaching earth’s surface causing crop loss & deforestation.
Incorrect
Stratospheric ozone absorbs the harmful UV radiation from sun and prevent it from reaching lower levels of atmosphere. Depletion in ozone layer results in UV radiation reaching earth’s surface causing crop loss & deforestation.
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Question 10 of 15
10. Question
1 pointsThe Montreal Protocol entered into force in mid ______:
Correct
Montreal Protocol is signed on Sep 16th, 1987 to regulate the use and production of chemicals responsible for ozone layer depletion. This agreement called for a phase out of certain CFCs, HCFCs, and halons
Incorrect
Montreal Protocol is signed on Sep 16th, 1987 to regulate the use and production of chemicals responsible for ozone layer depletion. This agreement called for a phase out of certain CFCs, HCFCs, and halons
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Question 11 of 15
11. Question
1 pointsThe rise in the amount of Chlorine measured in the stratosphere over the past two decades matches the rise in the amount of _______:
Correct
CFCs & HCFCs molecules contain Chlorine & Fluorine atoms. When these interact with Sun’s UV radiation, chlorine ion is separated from the CFC or HCFC molecule. Therefore the amount of chlorine formed can be determined by presence of fluorine in the Stratosphere
Incorrect
CFCs & HCFCs molecules contain Chlorine & Fluorine atoms. When these interact with Sun’s UV radiation, chlorine ion is separated from the CFC or HCFC molecule. Therefore the amount of chlorine formed can be determined by presence of fluorine in the Stratosphere
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Question 12 of 15
12. Question
1 pointsWhich of the following refrigerant recovery method is faster:
Correct
Liquid only refrigerant recovery is faster. However this method leaves vapour in the system
Incorrect
Liquid only refrigerant recovery is faster. However this method leaves vapour in the system
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Question 13 of 15
13. Question
1 pointsService technicians who violate Clean Air Act provisions may be:
Correct
Incorrect
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Question 14 of 15
14. Question
1 pointsStratospheric Ozone depletion is ______ problem
Correct
Incorrect
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Question 15 of 15
15. Question
1 pointsThe lower the ambient temperature, the ____ the recovery rate
Correct
Generally faster recovery is achieved with warmer system and colder recovery tank. Warmer the system refrigerant vapour will be more denser and compressor in the recovery system can able to evacuate more refrigerant per minute. Conversely lower ambient temperature results in slower recovery process
Incorrect
Generally faster recovery is achieved with warmer system and colder recovery tank. Warmer the system refrigerant vapour will be more denser and compressor in the recovery system can able to evacuate more refrigerant per minute. Conversely lower ambient temperature results in slower recovery process