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EPA 608 Free Online Practice test Questions Answers: Core exam 8
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Question 1 of 15
1. Question
1 pointsRefrigerant will be in _____ phase in suction line:
Correct
Refrigerant absorbs heat in evaporator and converts to cold vapour. This cold vapour enters the compressor through suction line
Incorrect
Refrigerant absorbs heat in evaporator and converts to cold vapour. This cold vapour enters the compressor through suction line
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Question 2 of 15
2. Question
1 pointsWhich of the following has the ozone depletion potential of 1:
Correct
R-11 is taken as reference for determining the ozone depletion potential of all refrigerants.
Incorrect
R-11 is taken as reference for determining the ozone depletion potential of all refrigerants.
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Question 3 of 15
3. Question
1 points______ which formed at the stratosphere is unstable and strips a free oxygen atom and then releases the chlorine ion which continue the chain reaction of destroying ozone molecules:
Correct
Sun’s UV radiation breaks Chlorine in CFCs or HCFCs to form Chlorine atom. This Chlorine atom reacts with ozone molecule to form chlorine monoxide radical and oxygen.
Incorrect
Sun’s UV radiation breaks Chlorine in CFCs or HCFCs to form Chlorine atom. This Chlorine atom reacts with ozone molecule to form chlorine monoxide radical and oxygen.
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Question 4 of 15
4. Question
1 pointsAs per the EPA, substantial leak is a leak of ____ per year or more of the normal charge for industrial process and commercial refrigeration systems:
Correct
Incorrect
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Question 5 of 15
5. Question
1 points_____ of stratospheric chlorine is contribution from natural sources such as volcano eruptions and others:
Correct
Approximately about 18% of stratospheric chlorine is contributed by natural sources like volcanic eruptions and other. About 82% chlorine is contributed by man made activities mainly CFC & HCFC refrigerants.
Incorrect
Approximately about 18% of stratospheric chlorine is contributed by natural sources like volcanic eruptions and other. About 82% chlorine is contributed by man made activities mainly CFC & HCFC refrigerants.
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Question 6 of 15
6. Question
1 pointsR-500 Refrigerant is which of the following:
Correct
Incorrect
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Question 7 of 15
7. Question
1 pointsIn Halide torch leak test if there is a refrigerant leak, the flame will turn:
Correct
Halide Torch Test is used to determine the small refrigerant leak. When flame is brought near the refrigerant leak it turns from pale blue to bright green
Incorrect
Halide Torch Test is used to determine the small refrigerant leak. When flame is brought near the refrigerant leak it turns from pale blue to bright green
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Question 8 of 15
8. Question
1 points_____ is the reaction of refrigerant with water:
Correct
Incorrect
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Question 9 of 15
9. Question
1 pointsAtmospheric pressure is ______ pounds per square inch:
Correct
Incorrect
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Question 10 of 15
10. Question
1 pointsAccording to Clean Air Act (CAA), R-22 must be:
Correct
On & after Jan 1st 2015, use of HCFC in new system is prohibited. After Jan 1st 2020, production & import of HCFC refrigerants are banned.
Incorrect
On & after Jan 1st 2015, use of HCFC in new system is prohibited. After Jan 1st 2020, production & import of HCFC refrigerants are banned.
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Question 11 of 15
11. Question
1 pointsAfter _____, the servicing of R-22-based systems will rely on recycled refrigerants:
Correct
Production or import of HCFC refrigerants are banned after 1st Jan, 2020.
Incorrect
Production or import of HCFC refrigerants are banned after 1st Jan, 2020.
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Question 12 of 15
12. Question
1 pointsNatural refrigerants such as carbon dioxide and hydro carbons (propane) have high Global Warming Potential (GWP) compared to HFCs
Correct
Carbon dioxide and Hydro Carbon refrigerants has very low Global Warming Potential & Ozone Depletion Potential. They are not currently used because, hydro carbon refrigerants (propane) is highly inflammable and CO2 refrigerant is inefficient & requires lot of energy
Incorrect
Carbon dioxide and Hydro Carbon refrigerants has very low Global Warming Potential & Ozone Depletion Potential. They are not currently used because, hydro carbon refrigerants (propane) is highly inflammable and CO2 refrigerant is inefficient & requires lot of energy
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Question 13 of 15
13. Question
1 pointsWhich of the following gas is used for holding charges or as leak test gases may be released:
Correct
Dry Nitrogen gas is used for both leak detection and purging agent.
Incorrect
Dry Nitrogen gas is used for both leak detection and purging agent.
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Question 14 of 15
14. Question
1 pointsAsphyxia is a condition caused because of lack of which of following:
Correct
Refrigerants are heavier gases compared to air (oxygen) and displaces it out if it leaks in a closed room. Asphyxia is a condition lack of oxygen why may lead to heart irregularities, unconsciousness and even death.
Incorrect
Refrigerants are heavier gases compared to air (oxygen) and displaces it out if it leaks in a closed room. Asphyxia is a condition lack of oxygen why may lead to heart irregularities, unconsciousness and even death.
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Question 15 of 15
15. Question
1 pointsDuring vacuum leak test, if the measured pressure increases ______ after a while, then it can be determined that refrigerant is still trapped in the system:
Correct
Incorrect