Information on CORE Practice Test 4
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This is the fourth test of five in our CORE series of free practice tests we have put together to get you the passing grades on your 608 certification exams.
* NOTE: Having a pressure-temperature reference for commonly used refrigerants is required to answer some of the questions on our practice tests unless you have a colossal memory.
- This practice test is free. Take it as often as you like.
- Contains 25 questions.
- Pressing the submit button immediately returns your resulting score.
- Passing score is 70%.
- Correct answer information is provided for questions answered incorrectly.
- Good luck!
| Trade Category: | HVACR |
| Test Category: | EPA 608 Certification |
| Test Subject: | Core |
| Test Number: | 4 of 5 |
| Questions on Test: | 25 |
| Passing Score: | 70% |
#1. An example of an HCFC refrigerant is
Correct answer is B: R-22
- R-410a HFC
- R-22 HCFC
- R-114 CFC
- R-717 is ammonia
#2. Which chemicals are controlled by the Montreal Protocol?
Correct answer is D: All of the above.
All of the following chemicals are controlled by the Montreal Protocol:
- Chlorofluorocarbons
- Hydrochlorofluorocarbons
- Halons
#3. Systems charged with R-134a should be leak-checked with
Correct answer is D: pressurized nitrogen.
Systems charged with R-134a should be leak-checked with pressurized nitrogen.
#4. When evacuating a system, the hoses should be
Correct answer is D: equal to or larger than vacuum pump inlet connection.
When evacuating a system, the hoses should be equal to or larger than vacuum pump inlet connection.
#5. It has been illegal to vent substitutes for CFC and HCFC refrigerants since
Correct answer is D: November 1995.
It has been illegal to vent substitutes for CFC and HCFC refrigerants since November 1995.
#6. Never use oxygen or compressed air to pressurize a system because
Correct answer is A: when mixed with compressor oil or some refrigerants, it could explode.
Never use oxygen or compressed air to pressurize a system because when mixed with compressor oil or some refrigerants, it could explode.
#7. Refrigerant cylinders should always be
Correct answer is D: All of the above.
Refrigerant cylinders should always adhere to the following:
- Be free of rust and damage.
- Be color-coded to indicate the contents.
- Be secure.
-
#8. Even though R-22 is considered non-toxic, it
Correct answer is B: can cause asphyxia.
Even though R-22 is considered non-toxic, it can cause asphyxia.
NT Note:
Asphyxiation, which is essentially suffocation resulting from a lack of oxygen, can occur when refrigerants are released and present in mechanical rooms, confined spaces, etc.
Because the refrigerant is heavier than the oxygen you breath, it actually displaces it from the floor up and deprives you. This is why refrigerant sensors that actuate alarms and ventilation equipment are mandated for mechanical equipment rooms.
#9. A system is dehydrated to
Correct answer is B: remove water and water vapor.
A system is dehydrated to remove water and water vapor.
#10. According to the EPA, of the refrigerants listed below, which types will not contribute to global warming?
Correct answer is D: They all contribute to global warming.
#11. The type of oil that is most commonly used in stationary air-conditioning applications with HFC-410a refrigerant is
Correct answer is A: ester oil.
The type of oil that is most commonly used in stationary air-conditioning applications with HFC-410a refrigerant is ester oil.
#12. Technicians receiving a passing grade on the Type II (medium-pressure, high-pressure, very high-pressure) exam are certified to recover refrigerant during the maintenance, service, and repair of medium/high/very high pressure equipment including the following:
Correct answer is D: With Type II certification, you are certified for all high-pressure refrigerants including CFC-13 and CFC-503.
#13. Personal protective equipment (gloves, safety glasses, safety shoes, etc) should always be worn when
Seriously I’m not even going to provide correct answer info for this one… If you cant figure out the right answer for this, an EPA test question on handling refrigerants, then it’s time for you to just go get a job shoveling shit somewhere.
#14. Refrigerant vapors or mist should not be inhaled because
Correct answer is D: they may cause heart irregularities and/or unconsciousness.
Refrigerant vapors or mist should not be inhaled because they may cause heart irregularities and/or unconsciousness.
#15. Of the items listed below, which is (are) violations of the Clean Air Act?
Correct answer is D: All of the above.
All of the following are violations of the Clean Air Act:
- Falsifying or failing to keep required records.
- Failing to reach required evacuation levels before opening or disposing of appliances.
- Knowingly releasing CFC or HCFC refrigerants or their substitutes while repairing appliances.
#16. HFC refrigerants contain
Correct answer is D: hydrogen, fluorine, and carbon.
HFC refrigerants contain hydrogen, fluorine, and carbon.
#17. Which refrigerant contains an HCFC?
Correct answer is B: R-22
- R-12 CFC
- R-22 HCFC
- R-134a HFC
- R-410a HFC
#18. Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be considered
Correct answer is A: system-dependent.
Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be considered system-dependent.
#19. Refrigerant that enters the compressor, under normal operating conditions, is a
Correct answer is A: low pressure vapor.
Refrigerant that enters the compressor, under normal operating conditions, is a low pressure vapor.
#20. It is necessary to place a refrigerant label on
Correct answer is A: a refrigerant cylinder which is being returned for reclaiming.
It is necessary to place a refrigerant label on a refrigerant cylinder which is being returned for reclaiming.
#21. Which refrigerant contains a CFC?
Correct answer is A: R-500
- R-500 CFC
- R-410a HFC
- R-134a HFC
- R-123 HCFC
#22. Use _________ to remove ice from a sight glass.
Correct answer is A: an alcohol spray
Use an alcohol spray to remove ice from a sight glass.
#23. According to the EPA, an oil sample should be taken for which of the following reasons?
Correct answer is B: The system had a leak or a major component failure.
According to the EPA, an oil sample should be taken for which of the following reasons? The system had a leak or a major component failure.
#24. The EPA requires the installation of a service aperture or process stub on all appliances using a Class I or Class II substance as a refrigerant. The main purpose of this requirement is to make it easier to
Correct answer is A: recover refrigerant.
The EPA requires the installation of a service aperture or process stub on all appliances using a Class I or Class II substance as a refrigerant. The main purpose of this requirement is to make it easier to recover refrigerant.
#25. Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under
Correct answer is B: ARI 740
Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under ARI 740.
NT Note:
ARI 740 is a standard or publication by the Air Conditioning Heating and Refrigeration Institute that specifies expected performance of refrigerant recovery equipment.
More 608 CORE Practice Tests
CORE Test 1
CORE Test 2
CORE Test 3
CORE Test 4
CORE Test 5
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