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EPA 608 Practice Test: Core Quiz 13
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Question 1 of 15
1. Question
1 pointsLong hoses will cause excessive pressure drop:
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Correct
Longer the hoses greater the pressure drop and slower will be the recovery of refrigerant.
Incorrect
Longer the hoses greater the pressure drop and slower will be the recovery of refrigerant.
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Question 2 of 15
2. Question
1 pointsThe refrigerant components present in the blended refrigerant will leak from the system while charging at uneven rates due to different:
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Correct
Incorrect
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Question 3 of 15
3. Question
1 pointsRefillable cylinders used for transporting recovered pressurized refrigerant must be approved by:
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Correct
Storage & Transportation of recovery refrigerant shall be carried out in cylinders approved by Department of Transportation (DOT)
Incorrect
Storage & Transportation of recovery refrigerant shall be carried out in cylinders approved by Department of Transportation (DOT)
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Question 4 of 15
4. Question
1 pointsVacuum lines should be ______ the pump intake connection
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Question 5 of 15
5. Question
1 pointsThe ______ will collide with another Ozone molecule, release its Oxygen atom:
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In stratosphere, when sun’s UV radiation breaks down the CFC molecule chlorine ion is formed. This chlorine ion strips an oxygen atom from ozone (O3) forming chlorine monoxide (ClO) and molecular oxygen (O2). The formed chlorine monoxide (ClO) radical strips another free oxygen atom and releases the chlorine ion to repeat the process. This process continuous in cycle resulting in greater depletion of ozone layer.
Incorrect
In stratosphere, when sun’s UV radiation breaks down the CFC molecule chlorine ion is formed. This chlorine ion strips an oxygen atom from ozone (O3) forming chlorine monoxide (ClO) and molecular oxygen (O2). The formed chlorine monoxide (ClO) radical strips another free oxygen atom and releases the chlorine ion to repeat the process. This process continuous in cycle resulting in greater depletion of ozone layer.
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Question 6 of 15
6. Question
1 pointsAn ozone molecule consists of _____ oxygen atoms
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Correct
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Question 7 of 15
7. Question
1 pointsMost refrigerant oils are not hygroscopic
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Correct
Incorrect
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Question 8 of 15
8. Question
1 pointsIt is the responsibility of the final person in the disposal chain to ensure that refrigerant has been removed from appliances before scrapping
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Correct
Anyone in the disposal chain can remove the refrigerant, however last person in the disposal chain (scrap metal or landfill operator) must ensure that all the refrigeration is removed and proper records are maintained
Incorrect
Anyone in the disposal chain can remove the refrigerant, however last person in the disposal chain (scrap metal or landfill operator) must ensure that all the refrigeration is removed and proper records are maintained
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Question 9 of 15
9. Question
1 pointsTo _________ the refrigerant is to remove refrigerant in any condition from a system and store it in an external container
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Correct
Recovered refrigerant need not require to maintain any purity standard.
Incorrect
Recovered refrigerant need not require to maintain any purity standard.
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Question 10 of 15
10. Question
1 pointsRefillable refrigerant cylinder must not be filled beyond _______ of its capacity by weight
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Correct
If refrigerant is filled beyond 80%, at higher temperatures refrigerant expands in cylinder and pressure increases which may lead to explosion
Incorrect
If refrigerant is filled beyond 80%, at higher temperatures refrigerant expands in cylinder and pressure increases which may lead to explosion
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Question 11 of 15
11. Question
1 pointsRecovery cylinders are used only with virgin refrigerant:
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Disposable refrigerant containers are used for virgin or reclaimed refrigerant
Incorrect
Disposable refrigerant containers are used for virgin or reclaimed refrigerant
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Question 12 of 15
12. Question
1 pointsAt high temperatures R-12 and R-22 decompose to form which of the following:
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Correct
At higher temperatures refrigerants react with moisture/water to form acids. This acids are corrosive in nature and damages the equipment
Incorrect
At higher temperatures refrigerants react with moisture/water to form acids. This acids are corrosive in nature and damages the equipment
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Question 13 of 15
13. Question
1 pointsThe factors affecting the speed and efficiency of evacuation are:
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Correct
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Question 14 of 15
14. Question
1 pointsWhen leak testing an R-134A system which of the following is used:
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Correct
Dry nitrogen is used to test for leakage and flush the debris out
Incorrect
Dry nitrogen is used to test for leakage and flush the debris out
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Question 15 of 15
15. Question
1 pointsApproved refrigerant recovery cylinders can easily be identified by which of the following colors:
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Correct
Incorrect