EPA 608 Free Practice exam Questions Answers: Core exam 3
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Question 1 of 20
1. Question
1 points
CFCs are highly reactive in lower levels of atmosphere:
Correct
CFCs are highly inert in lower levels of atmosphere corresponding to longer residence time and higher life time in lower levels of atmosphere.
Incorrect
CFCs are highly inert in lower levels of atmosphere corresponding to longer residence time and higher life time in lower levels of atmosphere.
Question 2 of 20
2. Question
1 points
Montreal Protocol is signed in which of the following year:
Correct
Montreal Protocol is signed on Sep 16th, 1987 to regulate the use and production of chemicals responsible for ozone layer depletion. Initially 46 counties signed the treaty, now has more than 200 signatories.
Incorrect
Montreal Protocol is signed on Sep 16th, 1987 to regulate the use and production of chemicals responsible for ozone layer depletion. Initially 46 counties signed the treaty, now has more than 200 signatories.
Question 3 of 20
3. Question
1 points
CFC-11 and CFC-12 Ozone depleting substances contributes ______ of stratospheric chlorine
Correct
Ozone depletion substances (Man made) attributes to about 82% of the stratospheric chlorine levels. In that about 51% is by CFC-11 & CFC-12 refrigerants.
Incorrect
Ozone depletion substances (Man made) attributes to about 82% of the stratospheric chlorine levels. In that about 51% is by CFC-11 & CFC-12 refrigerants.
Question 4 of 20
4. Question
1 points
which one of the following has Ozone Depletion Potential (ODP) value of 1:
Correct
Ozone Depletion Potential (ODP) is relative amount of degradation of the ozone layer a substance can cause with respect to R-11 or CFC-11. Therefore CFC-11 will have ODP equal to 1.
Incorrect
Ozone Depletion Potential (ODP) is relative amount of degradation of the ozone layer a substance can cause with respect to R-11 or CFC-11. Therefore CFC-11 will have ODP equal to 1.
Question 5 of 20
5. Question
1 points
The pressure of Nitrogen at which that is introduced into the evacuation system after evacuation of refrigerant is:
Correct
Nitrogen is purged into the evacuation system slightly above the atmospheric pressure to remove any non condensable gases & moisture from the system
Incorrect
Nitrogen is purged into the evacuation system slightly above the atmospheric pressure to remove any non condensable gases & moisture from the system
Question 6 of 20
6. Question
1 points
Flushing agents shall not be introduced into which of the following in a refrigeration system:
Correct
Flushing agent will removes lubrication oil of compressor
Incorrect
Flushing agent will removes lubrication oil of compressor
Question 7 of 20
7. Question
1 points
Suction line in refrigeration system consist of which of the following:
Correct
The inlet to the compressor in refrigeration system is called the suction line. This line brings the low pressure vapour in to the compressor
Incorrect
The inlet to the compressor in refrigeration system is called the suction line. This line brings the low pressure vapour in to the compressor
Question 8 of 20
8. Question
1 points
Long hoses between the unit and the recovery machine results in _______ in recovery time:
Correct
The longer the hose, higher will be the pressure drop in the system and longer it will take time for recovery
Incorrect
The longer the hose, higher will be the pressure drop in the system and longer it will take time for recovery
Question 9 of 20
9. Question
1 points
Reusable containers for refrigerants shall be tested for hydrostatically tested and date stamped for every _____ :
Correct
Incorrect
Question 10 of 20
10. Question
1 points
Which of the following refrigerant is used in very high pressure appliance:
Correct
R-410A- High Pressure Appliance
R-503- Very High Pressure Appliance
R-500- Medium Pressure Appliance
R-22- High Pressure Appliance
Incorrect
R-410A- High Pressure Appliance
R-503- Very High Pressure Appliance
R-500- Medium Pressure Appliance
R-22- High Pressure Appliance
Question 11 of 20
11. Question
1 points
______ is used to the push-pull recovery method of refrigeration:
Correct
In push-pull recovery method the refrigerant moves directly into the storage tank without any separation of oil from the refrigerant. Push-pull generally does not work on smaller systems
Incorrect
In push-pull recovery method the refrigerant moves directly into the storage tank without any separation of oil from the refrigerant. Push-pull generally does not work on smaller systems
Question 12 of 20
12. Question
1 points
____ recovery is the fastest and takes up less volume per pound of refrigerant to recover:
Correct
Liquid refrigerant recovery method is ideal for recovering large amount of refrigerant. This recovery method is faster but leaves vapour in the system
Incorrect
Liquid refrigerant recovery method is ideal for recovering large amount of refrigerant. This recovery method is faster but leaves vapour in the system
Question 13 of 20
13. Question
1 points
Process involved for Reclaimation and Recycling of refrigerants are same:
Correct
Recycling refrigerant refers to the reduction of used refrigerant contaminants using devices that reduce oil, water, acidity, and particulates. Reclamation of refrigerants refers to the reprocessing of used refrigerants to ARI 700 specifications. Reclamation is different from recycled refrigerant, which involves process of single or multiple passes through devices like filter driers.
Incorrect
Recycling refrigerant refers to the reduction of used refrigerant contaminants using devices that reduce oil, water, acidity, and particulates. Reclamation of refrigerants refers to the reprocessing of used refrigerants to ARI 700 specifications. Reclamation is different from recycled refrigerant, which involves process of single or multiple passes through devices like filter driers.
Question 14 of 20
14. Question
1 points
______ refrigerant can be transferred to another owner:
Correct
Reclaimed refrigerant shall meet ARI 700 purity specifications. Reclamation facilities generally purchase used recovered refrigerant if they determine it can be reclaimed from technician. They sell technician other reclaimed refrigerant that is processed earlier and certified as pure as per ARI 700
Incorrect
Reclaimed refrigerant shall meet ARI 700 purity specifications. Reclamation facilities generally purchase used recovered refrigerant if they determine it can be reclaimed from technician. They sell technician other reclaimed refrigerant that is processed earlier and certified as pure as per ARI 700
Question 15 of 20
15. Question
1 points
Dehydration evacuation will never remove mineral oil or the acid trapped in the oil:
Correct
Dehydration evacuation system will remove contaminants which are capable of evaporating
Incorrect
Dehydration evacuation system will remove contaminants which are capable of evaporating
Question 16 of 20
16. Question
1 points
Low-pressure systems typically have a pressure relief valve set at ____ :
Correct
Incorrect
Question 17 of 20
17. Question
1 points
The purged nitrogen gas shall be:
Correct
Incorrect
Question 18 of 20
18. Question
1 points
According to EPA requirements, systems that contain _____ or more of refrigerant to have “substantial leaks” repaired within 30 days.
Correct
The leakage rate is calculated by determining the current leak rate and projecting it over a 12-month period.
Incorrect
The leakage rate is calculated by determining the current leak rate and projecting it over a 12-month period.
Question 19 of 20
19. Question
1 points
At which of the following stage of the refrigeration system the refrigerant is in Warm liquid:
Correct
Pipe or hose carrying the refrigerant liquid from the condenser or receiver of a refrigeration system to a pressure-reducing device constitute liquid line. In liquid line refrigerant will be warm liquid phase.
Incorrect
Pipe or hose carrying the refrigerant liquid from the condenser or receiver of a refrigeration system to a pressure-reducing device constitute liquid line. In liquid line refrigerant will be warm liquid phase.
Question 20 of 20
20. Question
1 points
Which of the following device is located at the end of the liquid line:
Correct
Liquid line connects condenser to expansion device
Incorrect
Liquid line connects condenser to expansion device
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