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) 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) 10 inches Hg

B) 15 inches Hg

C) 4 inches Hg

D) 0 inches Hg

2 / 40

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

A) Reduce pressure

B) Remove moisture and contaminants

C) Control refrigerant flow

D) Increase refrigerant temperature

3 / 40

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

A) Both high and low side

B) High side of the system

C) Low side of the system

D) None of the above

4 / 40

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

A) Heater blankets

B) None of the above

C) a and b

D) Controlled hot water

5 / 40

5) 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) 15 inches Hg

B) 10 inches Hg

C) 0 inches Hg

D) 4 inches Hg

6 / 40

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

A) Refill it with refrigerant

B) Remove from service and properly dispose of it

C) Paint over the rust

D) Use it only for recovery

7 / 40

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

A) Alkylbenzene oil

B) PAG oil

C) Mineral oil

D) Polyolester oil

8 / 40

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

A) To allow for expansion of the refrigerant

B) To prevent leaks

C) To ensure proper pressure

D) To avoid contamination

9 / 40

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

A) Absorb heat from the refrigerant

B) Control the flow of refrigerant

C) Increase the pressure of the refrigerant

D) Reject heat from the refrigerant

10 / 40

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

A) You can see gas bubbles

B) Look for color changes of the refrigerant

C) Sight glass is clear

D) You can see moisture bubbles

11 / 40

11) 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) Low side of the system

D) None of the above

12 / 40

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

A) Cleans the air. Replace monthly.

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

C) Dryer’s air filters. Replace yearly.

D) To filter the oil. Change every year.

13 / 40

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

A) R-12

B) R-115

C) R-22

D) R-11

14 / 40

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

A) Evacuate the system

B) Pressurize the system

C) Charge the system

D) Recover the refrigerant

15 / 40

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

A) Leaks over 50 pounds must be repaired

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

C) None of the above

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

16 / 40

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

A) Wearing personal protective equipment (PPE)

B) Wearing hearing protection

C) Using a ladder

D) Wearing a harness

17 / 40

17) 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) Decrease the vacuum pressure.

C) Increase pressure by introducing nitrogen to counteract freezing.

D) Increase pressure by introducing air.

18 / 40

18) 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) Use a smaller vacuum pump.

D) Increase pressure by introducing nitrogen to counteract freezing.

19 / 40

19) How should a water box be leak tested?

A) Look for bubbles in the water

B) Test the water for traces of refrigerant

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

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

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) 15

B) 50

C) 35

D) 0

21 / 40

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

A) Pressure relief valve

B) Pressure gauge

C) Thermostat

D) Expansion valve

22 / 40

22) 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) Absorb heat from the refrigerant

D) Reject heat from the refrigerant

23 / 40

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

A) 15

B) 35

C) 0

D) 50

24 / 40

24) 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) 50

B) 0

C) 15

D) 35

25 / 40

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

A) An overcharge

B) Excessive oil in the system

C) A restriction at the TXV

D) A leak

26 / 40

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

A) Low pressure appliances

B) Refrigerators, freezers, and vending machine 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

27 / 40

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

A) R-500

B) R-134A

C) R-12

D) R-22

28 / 40

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

C) a and b

D) None of the above

29 / 40

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

A) Manufacturer's data sheet

B) All the above

C) Check the unit label

D) Using the temperature/pressure chart

30 / 40

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

A) Use a refrigerant recovery machine

B) Heat and tap the compressor with a mallet

C) Drain the oil

D) Use a vacuum pump

31 / 40

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

A) 20 psig

B) 5 psig

C) 15 psig

D) 10 psig

32 / 40

32) Describe ways you can visually look for leaks.

A) Looking for traces of oil

B) Excessive superheat, caused by low refrigerant charge

C) Using soap bubbles

D) All the above

33 / 40

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

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

B) Cleans the air. Replace monthly.

C) To filter the oil. Change every year.

D) Dryer’s air filters. Replace yearly.

34 / 40

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

A) R-12

B) R-22

C) R-500

D) R-134A

35 / 40

35) 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) 15

D) 50

36 / 40

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

A) Pressurize with oxygen and leak check

B) None of the above

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

D) Pressurize with compressed air and leak check.

37 / 40

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

A) To increase refrigerant levels

B) To reduce energy consumption

C) To prevent environmental harm and ensure system efficiency

D) To avoid system shutdowns

38 / 40

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

A) Sight glass is clear.

B) You can see gas bubbles.

C) Look for color changes of the refrigerant.

D) You can see moisture bubbles.

39 / 40

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

A) Control the flow of refrigerant

B) Absorb heat from the air

C) Reject heat from the refrigerant

D) Absorb heat from the refrigerant

40 / 40

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

A) Look for oil residue

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

C) Refrigerant dye

D) Soap bubbles.

Your score is

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