EPA 608 Type 3 Practice Test - HVAC Training 101

I have put together a study guide for the EPA 608 Type 3 test that will get you prepared to take the test. All of these questions are relevant knowledge that you should know and I’d suggest taking this test as many times possible until you get all of the questions correct. I’d also suggest checking out the EPA 608 core practice test as well since you will have to take the core along with the Type 3 test.

Other EPA Practice Tests

If you are interested in taking other EPA 608 certification practice tests you can find them below:

You can begin the test below. Good luck!

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Results

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#1. When using recovery equipment manufactured BEFORE November 15, 1993 you must evacuate a low pressure chiller to what level before making a major repair:

0 in of Hg

15 in of Hg

25 in of Hg

30 in of Hg

#2. Which is the most preferred method to pressurize a low-pressure systems for leak detection

Hot water method

Nitrogen

Compressor heat

#3. In a low pressure system, a leak will cause

contaminants to leak out

refrigerant to leak out

contaminants to leak in

#4. Which of the following are indicative of a leak in a low pressure system?

high head pressure

excessive running of purge system

excessive moisture in a purge unit

All of the above

#5. To recover refrigerant from low pressure equipment the technician must be certified in

Type 1

Type 3

Type 2 or Universal

Type 2

#6. The maximum test pressure for leak testing a low-pressure centrifugal chiller is

10 psig

10 mm of Hg

10 in of Hg

10 psia

#7. According to EPA regulations, commercial and industrial units containing 50 pounds of refrigerants must be repaired when the leak rate is above _______ annually

90%

15%

35%

#8. According to EPA regulations, non-commercial air conditioner units containing 50 pounds of refrigerants must be repaired when the leak rate is above _______ annually

90%

15%

35%

#9. What is the advantage of recovering liquid at the beginning?

It speeds up the recovery process

It allows for easy recovery of vapor later

It helps reduce the contaminants in the leaking into the system

#10. When recharging a refrigeration system with R-11, what vapor pressure is necessary in the shells before charging with liquid?

16.9 mm of Hg

16.9 PSIG

16.9 psia

16.9 in of Hg

#11. Immediately after recovering the liquid refrigerant, one must

Recover the vapor

Circulate water to prevent freezing

Heat the oil to 130°F

All of the above

#12. When removing oil from a low pressure system, a temperature of 130°F should be maintained because

Warm refrigerant drains quickly thus speeding the recovery process

Refrigerant trapped in oil is minimized at higher temperatures

Heating refrigerant makes it un harmful when released into the atmosphere

#13. Before charging a system with refrigerant liquid, one can determine that enough vapor has entered the refrigeration system by which of the following means?

When the pressure increases after maintaining a low pressure for a few seconds

When the saturation temperature is above the freezing point of water

After 30 seconds

When the compressor unit is hot

#14. High pressure cut-out level should be set at ___ for recovery devices used with low-pressure appliances.

10 mm of Hg

10 in of Hg

10 psia

10 psig

#15. It is important to circulate or remove water from chiller during refrigerant evacuation to prevent freezing.

True

False

#16. When charging a low pressure unit, which form of refrigerant should be first introduced and why?

Liquid refrigerant to improve the speed of recharging

Refrigerant vapor to prevent freezing of water in the tubes

Liquid refrigerant to minimize the contaminants entering the system

#17. The lowest access point on a low pressure centrifugal air conditioner is the

Liquid line

Evaporator charging valve

Vapor line

#18. Charging refrigerant liquid into a refrigeration system when it is under a 29 inch Hg vacuum can cause _________

The compressor to overheat

The system water to freeze

The evaporator valve to burst

#19. The recharging point for a low pressure centrifugal air conditioner should be done at

Highest access point

Lowest access point

Lowest temperature point

Highest pressure point

#20. When using recovery and recycling equipment manufactured AFTER November 15, 1993, technicians must evacuate an appliance component containing low pressure refrigerants to ______ before making a major repair, depending on the quantity of refrigerant in the system.

0 mm of Hg ( 200 pounds)

25 mm of Hg absolute irrespective of refrigerant quantity

10 mm of Hg ( 200 pounds)

#21. As per the EPA, which of the following is considered a major repair?

Replacing a compressor or condenser

Replacing an evaporator

Replacing a heat exchanger

All of the above

#22. Which of the following is NOT a major repair?

Replacing condenser fan motor

Replacing heat exchanger

Replacing evaporator coil

#23. What is the required vacuum level for recovering refrigerant from a low pressure system if the technician is using recovery equipment manufactured BEFORE November 15, 1993?

25 in of Hg vacuum

25 psia

25 psig

#24. Which of the following are the allowable methods for pressurizing a low-pressure system for a non-major repair?

Controlled hot water

System heating/pressurizing device

Both A and B

#25. When evacuating a low pressure system, if the system pressure rises after achieving a vacuum, it means

The recovery equipment is faulty

Liquid refrigerant is still trapped in the system or oil

There is a huge leak in the system

#26. The purge unit in a low pressure system will

remove non-condensables, air and moisture from the system

Purge harmful HCFCs from the system

Help maintain the flow of water in the system to prevent freezing

#27. The pressure corresponding to 55 F for R-11 is (use chart here)

10 psig

10 psia

10 in of Hg

10 mm of Hg

#28. ASHRAE Standard 15 requires that the rooms with refrigerant systems must be equipped with sensors

that sound an alarm with oxygen deprivation

that sound an alarm and automatically starting a ventilation system with oxygen deprivation

that detect high levels of refrigerant vapors and warn the users to vacate the room

#29. In a low pressure system, the pressure relief valves

Must never exceed more than 2 in number

Must never be installed in series

Must never be activated simultaneously opened

#30. Under ASHRAE Standard 15, there is a need to have equipment room refrigerant sensor for which of the following refrigerants?

R-22

R-134a

R-123

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