EPA 608 Type 2 Practice Test 2025 (High Pressure Appliances)

Last Updated on April 21, 2025

EPA 608 Type 2 Practice Test 2025 (High or Very High-Pressure Appliances) Questions and Answers. You can free prepare for the EPA 608 Certification Exam on our website.

High-pressure or extremely high-pressure systems are covered in the Type II exam, but not vehicle air conditioning or small appliances. Although the recovery procedures and standards are also part of this exam, the focus is more on leak detection.

In the actual test, there will be 25 questions with the following subject matter:

Before charging a system, it is essential to know the correct methods for identifying leaks and conducting a leak test.
Annual leak rate for systems holding more than 50 pounds of refrigerant in commercial and industrial refrigeration
Techniques and needs for recovery
The best way to manage emissions while the system is being recovered and reduce cross-contamination
Recovery requirements for the disposal, maintenance, and leaks of these systems.
The determination of a high-pressure system’s essential parts
How to do the pressure/temperature test and where the refrigerant is situated in the system

EPA 608 Type 2 Practice Test (High or Very High Pressure Appliances)

EPA 608 Type 2 High or Very high Pressure Appliances

1 / 40

1) What are the typical pressure settings for rupture discs on low pressure systems and recovery equipment?

A) 15 psig

B) 20 psig

C) 10 psig

D) 5 psig

2 / 40

2) Before charging a new system with refrigerant, what should be done?

A) None of the above

B) Pressurize with oxygen and leak check

C) Pressurize with nitrogen (classified as an inert gas) and leak checked.

D) Pressurize with compressed air and leak check.

3 / 40

3) What is the purpose of the filter drier and when should it be changed?

A) Dryer’s air filters. Replace yearly.

B) Cleans the air. Replace monthly.

C) To filter the oil. Change every year.

D) To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened

4 / 40

4) Comfort cooling chillers and all other equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations:

A) 15

B) 50

C) 0

D) 35

5 / 40

5) Describe ways you can visually look for leaks.

A) Excessive superheat, caused by low refrigerant charge

B) Looking for traces of oil

C) Using soap bubbles

D) All the above

6 / 40

6) How can you tell through a sight glass if there is excess moisture in the system?

A) Look for color changes of the refrigerant.

B) Sight glass is clear.

C) You can see moisture bubbles.

D) You can see gas bubbles.

7 / 40

7) What are the leak repair requirements for comfort cooling appliances and commercial appliances containing 50 lbs. or more of refrigerant?

A) Must be repaired if leak rate exceeds 35% in all commercial and industrial process refrigeration.

B) None of the above

C) a and b

D) Must be repaired if leak rate exceeds 15% in comfort cooling appliances.

8 / 40

8) What safety precaution should be taken when working with refrigerants?

A) Wearing hearing protection

B) Using a ladder

C) Wearing a harness

D) Wearing personal protective equipment (PPE)

9 / 40

9) Type II classification, as identified by EPA, applies to what equipment?

A) Refrigerators, freezers, and vending machine appliances

B) Low pressure appliances

C) Small appliances with five (5) pounds of refrigerant or less

D) Split air conditioning equipment with five (5) pounds of refrigerant or more

10 / 40

10) What is the primary function of an evaporator in a refrigeration system?

A) Reject heat from the refrigerant

B) Absorb heat from the air

C) Absorb heat from the refrigerant

D) Control the flow of refrigerant

11 / 40

11) How can you tell through a sight glass if there is excess moisture in the system?

A) Look for color changes of the refrigerant

B) Sight glass is clear

C) You can see moisture bubbles

D) You can see gas bubbles

12 / 40

12) Using large vacuum pumps can lead to freezing of water in the system. What are ways the technician can help prevent the freezing?

A) Decrease the vacuum pressure.

B) Increase pressure by introducing air.

C) Increase pressure by introducing nitrogen to counteract freezing.

D) Use a smaller vacuum pump.

13 / 40

13) Why should refrigerant cylinders not be filled more than 80%?

A) To ensure proper pressure

B) To avoid contamination

C) To allow for expansion of the refrigerant

D) To prevent leaks

14 / 40

14) The required level of evacuation for recovery equipment manufactured after November 15, 1993, on a system containing less than 200 pounds of R-12 refrigerant is:

A) 4 inches Hg

B) 15 inches Hg

C) 0 inches Hg

D) 10 inches Hg

15 / 40

15) What safety device is used to prevent over-pressurization in a refrigeration system?

A) Pressure gauge

B) Thermostat

C) Pressure relief valve

D) Expansion valve

16 / 40

16) Comfort cooling chillers and all other equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations:

A) 35

B) 0

C) 50

D) 15

17 / 40

17) Why is it important to regularly check and repair refrigerant leaks?

A) To avoid system shutdowns

B) To prevent environmental harm and ensure system efficiency

C) To reduce energy consumption

D) To increase refrigerant levels

18 / 40

18) How should a water box be leak tested?

A) Remove water, pressurize and check with a gas detector

B) Test the water for traces of refrigerant

C) Remove water, then place the leak detector probe in through the drain valve

D) Look for bubbles in the water

19 / 40

19) How can you increase the pressure in the system to leak check a low-pressure system?

A) a and b

B) None of the above

C) Controlled hot water

D) Heater blankets

20 / 40

20) Industrial process and commercial refrigeration equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations.

A) 35

B) 0

C) 15

D) 50

21 / 40

21) What should be done if a refrigerant cylinder shows signs of rust or damage?

A) Paint over the rust

B) Use it only for recovery

C) Remove from service and properly dispose of it

D) Refill it with refrigerant

22 / 40

22) What type of refrigerant was the most common before outlawing CFCs and HCFCs?

A) R-12

B) R-134A

C) R-500

D) R-22

23 / 40

23) What must be done before opening a refrigeration system for maintenance?

A) Charge the system

B) Recover the refrigerant

C) Pressurize the system

D) Evacuate the system

24 / 40

24) Using large vacuum pumps can lead to freezing of water in the system. What are ways the technician can help prevent the freezing?

A) Use a smaller vacuum pump.

B) Increase pressure by introducing nitrogen to counteract freezing.

C) Increase pressure by introducing air.

D) Decrease the vacuum pressure.

25 / 40

25) What is the primary purpose of a filter-drier in a refrigeration system?

A) Remove moisture and contaminants

B) Reduce pressure

C) Control refrigerant flow

D) Increase refrigerant temperature

26 / 40

26) What is the primary purpose of a condenser in a refrigeration system?

A) Control the flow of refrigerant

B) Increase the pressure of the refrigerant

C) Reject heat from the refrigerant

D) Absorb heat from the refrigerant

27 / 40

27) When using a system-dependent recovery system with a non-operating compressor, where should the refrigerant be recovered from?

A) High side of the system

B) Both high and low side

C) None of the above

D) Low side of the system

28 / 40

28) What is the purpose of the filter drier and when should it be changed?

A) To filter the oil. Change every year.

B) Dryer’s air filters. Replace yearly.

C) Cleans the air. Replace monthly.

D) To remove moisture from the refrigerant, replace on a routine basis or anytime a system is opened

29 / 40

29) What type of refrigerant was the most common before outlawing CFCs and HCFCs?

A) R-500

B) R-134A

C) R-22

D) R-12

30 / 40

30) Traces of oil around a sight glass inlet fitting of a refrigeration system might be the indication of:

A) A leak

B) An overcharge

C) Excessive oil in the system

D) A restriction at the TXV

31 / 40

31) What tools can you use to find the general area of leaks and pinpoint leaks?

A) Soap bubbles.

B) Refrigerant dye

C) Electronic or ultrasonic leak detector will provide the general area of the leak.

D) Look for oil residue

32 / 40

32) How can you tell what type of refrigerant is in a system?

A) Using the temperature/pressure chart

B) All the above

C) Check the unit label

D) Manufacturer's data sheet

33 / 40

33) The required level of evacuation for recovery equipment manufactured after November 15, 1993, on a system containing less than 200 pounds of R-12 refrigerant is:

A) 4 inches Hg

B) 15 inches Hg

C) 10 inches Hg

D) 0 inches Hg

34 / 40

34) What is the primary purpose of a condenser in a refrigeration system?

A) Reject heat from the refrigerant

B) Absorb heat from the refrigerant

C) Control the flow of refrigerant

D) Increase the pressure of the refrigerant

35 / 40

35) Which refrigerant can be used for leak detection as a trace gas and pressurized with nitrogen?

A) R-22

B) R-115

C) R-12

D) R-11

36 / 40

36) What should be done with leaks in small appliances?

A) Not mandatory to perform a leak repair; however, it should be done whenever possible

B) None of the above

C) Leaks over 50 pounds must be repaired

D) Leaks more than one pound and under 5 pounds must be repaired

37 / 40

37) What is the most effective way to remove trapped refrigerant from oil during recovery?

A) Use a refrigerant recovery machine

B) Use a vacuum pump

C) Drain the oil

D) Heat and tap the compressor with a mallet

38 / 40

38) Industrial process and commercial refrigeration equipment with over 50 pounds of refrigerant with an annual leak rate of ___ % requires repair under EPA regulations.

A) 0

B) 50

C) 35

D) 15

39 / 40

39) When using a system-dependent recovery system with an operating compressor, where should the refrigerant be recovered from?

A) Low side of the system

B) High side of the system

C) None of the above

D) Both high and low side

40 / 40

40) What type of oil is commonly used with R-22 refrigerant?

A) Alkylbenzene oil

B) Polyolester oil

C) PAG oil

D) Mineral oil

Your score is

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