Information on Low-Pressure Practice Test 3
This is the last test in our series of free low-pressure practice tests. As such it contains only 10 questions compared to the others which have 25. Like our other EPA 608 series of practice tests, any new unique questions we obtain will be added to this last test in the series. Again, thanks for sharing our tests with others who may find them useful. Our practice tests are most likely the best mobile-friendly ones on the web.
* 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.
- This Low-Pressure practice test is free. Take it as often as you like.
- Contains 10 questions.
- Pressing the submit button immediately returns your score.
- Passing score is 70%. (7 out of 10)
- Correct answer information is provided for questions answered incorrectly.
- Good luck!
| Trade Category: | HVACR |
| Test Category: | EPA 608 Certification |
| Test Subject: | Type III (Low-Pressure) |
| Test Number: | 3 of 3 |
| Questions on Test: | 10 |
| Passing Score: | 70% |
#1. During the evacuation of a system containing large amounts of moisture, you can prevent freezing of this moisture by increasing the pressure with
Correct answer is A: nitrogen gas.
During the evacuation of a system containing large amounts of moisture, you can prevent freezing of this moisture by increasing the pressure with nitrogen gas.
#2. If you suspect a leak in the water box of a chiller, you should place the leak detector probe ___________ , and sniff for refrigerants.
Correct answer is D: through a drain valve
If you suspect a leak in the water box of a chiller, you should place the leak detector probe through a drain valve , and sniff for refrigerants.
#3. To determine how much vapor to charge into an evacuated chiller, you should charge with vapor until
Correct answer is A: the system pressure corresponds to a refrigerant saturation temperature of 36 F.
To determine how much vapor to charge into an evacuated chiller, you should charge with vapor until the system pressure corresponds to a refrigerant saturation temperature of 36 F.
#4. ASHRAE Standard 15-1994 requires the use of room sensors and alarms to detect
Correct answer is A: refrigerant leaks.
ASHRAE Standard 15-1994 requires the use of room sensors and alarms to detect refrigerant leaks.
#5. The discharge from a rupture disc should be piped ________ for venting.
Correct answer is A: outdoors
The discharge from a rupture disc should be piped outdoors for venting.
#6. A centrifugal chiller’s rupture disc is connected to the chiller’s
Correct answer is B: evaporator
A centrifugal chiller’s rupture disc is connected to the chiller’s evaporator.
#7. To remove ice from sight glasses or viewing glasses, use
Correct answer is B: an alcohol spray
To remove ice from sight glasses or viewing glasses, use an alcohol spray.
#8. The maximum test pressure for leak testing a low-pressure centrifugal is
Correct answer is B: 10 psig
The maximum test pressure for leak testing a low-pressure centrifugal is 10 psig.
#9. Excessive running of a purge system on a low-pressure chiller generally indicates that the
Correct answer is D: system is leaking.
Excessive running of a purge system on a low-pressure chiller generally indicates that the system is leaking.
#10. The typical design burst pressure of a rupture disc on a low-pressure centrifugal air-conditioning system is set at
Correct answer is C: 15 psi
The typical design burst pressure of a rupture disc on a low-pressure centrifugal air-conditioning system is set at 15 psi.
More Type 3 Low-Pressure Practice Tests
Type 3 Test 1
Type 3 Test 2
Type 3 Test 3
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