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EPA 608 Free Online Practice test Questions Answers: Core exam 6
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Question 1 of 20
1. Question
1 pointsBan on the production or import of any HCFC refrigerant will take effect from _____.
Correct
On or after 1st Jan 2020, production or import of HCFC refrigerant will be banned. Only reclaimed or recovered HCFC shall be used for existing equipment
Incorrect
On or after 1st Jan 2020, production or import of HCFC refrigerant will be banned. Only reclaimed or recovered HCFC shall be used for existing equipment
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Question 2 of 20
2. Question
1 pointsUV radiation can cause which of the following:
1) Suppression of the immune system
2) Increase in skin cancers and cataractsWhich of the following options is / are correct:
Correct
Over exposure to UV radiation results in skin cancer, cell mutation, cornea (in front of eyes) and premature ageing of skin
Incorrect
Over exposure to UV radiation results in skin cancer, cell mutation, cornea (in front of eyes) and premature ageing of skin
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Question 3 of 20
3. Question
1 pointsWhich one of the following is HCFC refrigerant:
Correct
R-22 – HCFC
R-11 – CFC
R-113 – CFC
R-410a- HFCIncorrect
R-22 – HCFC
R-11 – CFC
R-113 – CFC
R-410a- HFC -
Question 4 of 20
4. Question
1 pointsWhich one the of the following refrigerants contribute to global warming:
Correct
All the mentioned refrigerants contributes to Global Warming. Global Warming Potential (GWP) is taken with reference as CO2 (as 1). All HFCs, HCFCs & CFCs contribute to global warming and has several times higher than CO2
Incorrect
All the mentioned refrigerants contributes to Global Warming. Global Warming Potential (GWP) is taken with reference as CO2 (as 1). All HFCs, HCFCs & CFCs contribute to global warming and has several times higher than CO2
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Question 5 of 20
5. Question
1 pointsMontreal Protocol agreement is not called for a phase out of following refrigerants:
Correct
Refrigerant accelerating phase-out schedule for CFCs, Halons, carbon tetrachloride, and methyl chloroform, and added HCFCs and methyl bromide is called for
Incorrect
Refrigerant accelerating phase-out schedule for CFCs, Halons, carbon tetrachloride, and methyl chloroform, and added HCFCs and methyl bromide is called for
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Question 6 of 20
6. Question
1 pointsAn electronic leak detector can detect leak rates of about ____ per year:
Correct
Electronic leak detectors can able to detect refrigerant as low as 0.5oz. This type of leak detector draws a sample of vapour and heats it and test for electrical conductivity. If refrigerant is available in the vapour it changes the electrical conductivity confirming leak
Incorrect
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Question 7 of 20
7. Question
1 pointsMany refillable cylinders have which of following for automatically shut the system off when the storage tank level reaches above 80% level:
Correct
This is to limit the refrigerant fill to a maximum of 80% level in storage tank, else if the temperature increases the refrigerant in cylinder expands results in explosion.
Incorrect
This is to limit the refrigerant fill to a maximum of 80% level in storage tank, else if the temperature increases the refrigerant in cylinder expands results in explosion.
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Question 8 of 20
8. Question
1 pointsHalide torch is the most effective method for checking the small leaks:
Correct
Halide Torch Leak Detector works on the principle of change in colour of flame in presence of refrigerant from pale blue to bright green. This leak detector can detect leaks as small as 0.5 to 2 oz per year. This detector is ineffective with hydrocarbon refrigerants
Incorrect
Halide Torch Leak Detector works on the principle of change in colour of flame in presence of refrigerant from pale blue to bright green. This leak detector can detect leaks as small as 0.5 to 2 oz per year. This detector is ineffective with hydrocarbon refrigerants
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Question 9 of 20
9. Question
1 pointsSmaller the refrigerant system size, ______ will be the Refrigerant Recovery Rate:
Correct
Incorrect
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Question 10 of 20
10. Question
1 pointsOnly cylinders designated as “refillable” by the _______ can be used for refrigerant recovery:
Correct
DOT approved cylinder shall be used for recovery of refrigerant and transportation of pressurized recovery refrigerant. Recovery cylinders will have grey body with yellow tops.
Incorrect
DOT approved cylinder shall be used for recovery of refrigerant and transportation of pressurized recovery refrigerant. Recovery cylinders will have grey body with yellow tops.
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Question 11 of 20
11. Question
1 pointsDisposable cylinders consists of which of the following:
Correct
All disposable cylinders will have one way check valve which allow the refrigerant to leave the cylinder and will not allow refilling it
Incorrect
All disposable cylinders will have one way check valve which allow the refrigerant to leave the cylinder and will not allow refilling it
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Question 12 of 20
12. Question
1 pointsWhen checking for leaks in a system, which of the following gas is used:
Correct
Nitrogen gas is used for checking leaks in the system as it temperature variation under pressurization is low. It is also considered because of relative inert and inexplosive nature
Incorrect
Nitrogen gas is used for checking leaks in the system as it temperature variation under pressurization is low. It is also considered because of relative inert and inexplosive nature
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Question 13 of 20
13. Question
1 pointsVacuum lines (hoses) of the evacuation system should be equal to or larger than the pump intake connection
Correct
Vacuum hoses should be larger in diameter (should not leak) and shorter in length to reduce pressure drop
Incorrect
Vacuum hoses should be larger in diameter (should not leak) and shorter in length to reduce pressure drop
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Question 14 of 20
14. Question
1 pointsThe scale on the high pressure of gauge manifold is calibrated in the range:
Correct
Incorrect
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Question 15 of 20
15. Question
1 pointsEvaporator is located in which part of the refrigeration cycle:
Correct
In refrigeration system, evaporator is on the low pressure side & condenser is on high pressure side
Incorrect
In refrigeration system, evaporator is on the low pressure side & condenser is on high pressure side
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Question 16 of 20
16. Question
1 pointsReclaimed refrigerant must meet the standard set forth in _____ before it can be resold
Correct
Incorrect
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Question 17 of 20
17. Question
1 pointsRefrigerants will be of high pressure hot vapor phase in which of the following:
Correct
As the refrigerant is compressed, hot vapour leaves the compressor to condenser for expansion. This is discharge line in refrigeration system
Incorrect
As the refrigerant is compressed, hot vapour leaves the compressor to condenser for expansion. This is discharge line in refrigeration system
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Question 18 of 20
18. Question
1 points______ nitrogen is used to pressurize the system:
Correct
Dry Nitrogen gas is used to pressurize the system for determining the leak & purging contaminants from the system
Incorrect
Dry Nitrogen gas is used to pressurize the system for determining the leak & purging contaminants from the system
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Question 19 of 20
19. Question
1 pointsRecovery is done in order to have which of the following:
Correct
Incorrect
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Question 20 of 20
20. Question
1 pointsThe fastest way to dehydrate a system is with which of the following:
Correct
Incorrect