Information on High Pressure Practice Test 2
This is the second of four in our series of free practice tests on handling refrigerants in high-pressure appliances and servicing high-pressure refrigeration equipment. Our practice tests are among the best mobile-friendly tests on the web and render great on phones and tablets for students and apprentices on the go. Please consider sharing them with others that may find them useful, individually or in forums. Thanks… NT.
* 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 an amazing memory.
- Take this free test as often as you like.
- Contains 25 questions.
- Pressing the submit button immediately returns your resulting score.
- Passing score is 70%. (18 out of 25)
- Correct answer information is provided for questions answered incorrectly.
- Good luck!
| Trade Category: | HVACR |
| Test Category: | EPA 608 Certification |
| Test Subject: | Type II (High-Pressure / Very High-Pressure) |
| Test Number: | 2 of 4 |
| Questions on Test: | 25 |
| Passing Score: | 70% |
#1. When a refrigerant trace gas becomes absolutely necessary to use, which of the available refrigerants should be used to identify a leak?
Correct answer is B: HCFC-22
When a refrigerant trace gas becomes absolutely necessary to use, which of the available refrigerants should be used to identify a leak? HCFC-22
#2. After refrigerant liquid has been recovered from a system, any remaining vapor is
Correct answer is: condensed by the recovery system.
After refrigerant liquid has been recovered from a system, any remaining vapor is condensed by the recovery system.
#3. An oil sample should be taken when
Correct answer is B: the compressor has burned out.
An oil sample should be taken when the compressor has burned out.
#4. In a refrigeration system with a TXV or other type of throttling device, the component directly following the condenser would be the
Correct answer is A: receiver.
In a refrigeration system with a TXV or other type of throttling device, the component directly following the condenser would be the receiver.
#5. Recovered refrigerant may contain which of the following?
Correct answer is D: All of the above
Recovered refrigerant may contain acids, moisture, and oils among other noncendensibles.
#6. The backseating of a suction shut-off valve will close the
Correct answer is C: gauge port.
The backseating of a suction shut-off valve will close the gauge port.
#7. Which repair would always be considered “major” under the EPA’s regulations?
Correct answer is A: Replacement of an evaporator coil.
Which repair would always be considered “major” under the EPA’s regulations? Replacement of an evaporator coil.
#8. R-410a requires certified recovery and recycling equipment rated for at least
Correct answer is C: 400 psig
R-410a requires certified recovery and recycling equipment rated for at least 400 psig.
#9. A compressor heater is used to
Correct answer is D: reduce the amount of refrigerant in the lubricating oil.
A compressor heater is used to reduce the amount of refrigerant in the lubricating oil.
#10. Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recycled?
Correct answer is D: Recover as much of the R-502 as possible from the recovery machine, change the filter, and evacuate.
Your recovery/recycling machine has R-502 refrigerant in it. You now have to recover refrigerant from a unit with R-22. What must be done before the R-22 refrigerant can be recovered/recycled? Recover as much of the R-502 as possible from the recovery machine, change the filter, and evacuate.
#11. The fastest way to recover refrigerant from a system is to remove it in the _______ phase.
Correct answer is C: liquid
The fastest way to recover refrigerant from a system is to remove it in the liquid phase.
#12. Before using a recovery unit to remove a charge, what steps should be taken?
Correct answer is D: All of the above.
Before using a recovery unit to remove a charge, the following steps should be taken:
- Check service valve positions.
- Check the oil level in the recovery unit:
- Evacuate recovery unit and recovery tank.
#13. A deep vacuum is usually measured in
Correct answer is D: microns
A deep vacuum is usually measured in microns.
#14. Before transferring refrigerant to an empty cylinder
Correct answer is D: the cylinder should be evacuated to avoid mixing air with the recovered refrigerant.
Before transferring refrigerant to an empty cylinder the cylinder should be evacuated to avoid mixing air with the recovered refrigerant.
#15. To recover liquid refrigerant, you must connect one hose to the
Correct answer is C: liquid line.
To recover liquid refrigerant, you must connect one hose to the liquid line.
#16. A system can be evacuated to only atmospheric pressure when
Correct answer is C: leaks in the appliance make evacuation to the prescribed level unattainable.
A system can be evacuated to only atmospheric pressure when leaks in the appliance make evacuation to the prescribed level unattainable.
#17. The vacuum pump used to evacuate a system should be capable of pulling a vacuum of
Correct answer is C: 500 microns.
The vacuum pump used to evacuate a system should be capable of pulling a vacuum of 500 microns.
#18. While R-410a is a high-pressure refrigerant, it can be stored in the back of your service van as long as
Correct answer is A: the temperature inside the vehicle does not exceed 125F. This is the same guidance given for R-22 and other common refrigerants.
While R-410a is a high-pressure refrigerant, it can be stored in the back of your service van as long as the temperature inside the vehicle does not exceed 125F. This is the same guidance given for R-22 and other common refrigerants.
#19. When under a deep vacuum, the motor winding of a hermetic refrigeration compressor
Correct answer is A: will be damaged if energized.
When under a deep vacuum, the motor winding of a hermetic refrigeration compressor will be damaged if energized.
#20. Which statement is NOT true regarding recycling and recovery equipment manufactured after November 15 1993?
Correct answer is D: It must have an oil separator.
#21. When a unit is opened for servicing, the ________ should always be replaced.
Correct answer is D: filter-drier
When a unit is opened for servicing, the filter-drier should always be replaced.
#22. When servicing an operating unit that has a receiver/storage tank, the
Correct answer is C: refrigerant should be recovered into the receiver.
When servicing an operating unit that has a receiver/storage tank, the refrigerant should be recovered into the receiver.
#23. 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.
#24. The refrigerant pressure inside an R-12 unit which is at room temperature (72F) and not operating is
Correct answer is A: approximately 74 psig.
The refrigerant pressure inside an R-12 unit which is at room temperature (72F) and not operating is approximately 74 psig.
#25. You are going to service a newer residential split-system air-conditioner. You would expect to find the system charged with which refrigerant?
Correct answer is C: R-410a
You are going to service a newer residential split-system air-conditioner. You would expect to find the system charged with which refrigerant? R-410a
More Type 2 High-Pressure Practice Tests
Type 2 Test 1
Type 2 Test 2
Type 2 Test 3
Type 2 Test 4
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