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

Last Updated on January 18, 2025

EPA 608 Type 2 Practice Test 2025 (High or Very High-Pressure Appliances) Questions 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, the correct ways to look for leaks and how to conduct 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 these systems’ disposal, maintenance, and leaks.
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) 0 inches Hg

B) 15 inches Hg

C) 4 inches Hg

D) 10 inches Hg

2 / 40

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

A) Absorb heat from the refrigerant

B) Absorb heat from the air

C) Reject heat from the refrigerant

D) Control the flow of refrigerant

3 / 40

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

A) Low side of the system

B) None of the above

C) Both high and low side

D) High side of the system

4 / 40

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

A) Soap bubbles.

B) Refrigerant dye

C) Look for oil residue

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

5 / 40

5) 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) Decrease the vacuum pressure.

D) Increase pressure by introducing air.

6 / 40

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

A) Increase pressure by introducing nitrogen to counteract freezing.

B) Decrease the vacuum pressure.

C) Increase pressure by introducing air.

D) Use a smaller vacuum pump.

7 / 40

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

A) Mineral oil

B) Alkylbenzene oil

C) PAG oil

D) Polyolester oil

8 / 40

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

A) R-12

B) R-500

C) R-134A

D) R-22

9 / 40

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

A) All the above

B) Manufacturer's data sheet

C) Using the temperature/pressure chart

D) Check the unit label

10 / 40

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

A) Pressurize with oxygen and leak check

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

C) None of the above

D) Pressurize with compressed air and leak check.

11 / 40

11) 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) 0

B) 35

C) 50

D) 15

12 / 40

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

A) You can see gas bubbles.

B) Sight glass is clear.

C) You can see moisture bubbles.

D) Look for color changes of the refrigerant.

13 / 40

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

A) Reject heat from the refrigerant

B) Control the flow of refrigerant

C) Absorb heat from the refrigerant

D) Increase the pressure of the refrigerant

14 / 40

14) 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) Both high and low side

C) None of the above

D) High side of the system

15 / 40

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

A) R-12

B) R-11

C) R-22

D) R-115

16 / 40

16) 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 15% in comfort cooling appliances.

B) None of the above

C) a and b

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

17 / 40

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

A) Remove from service and properly dispose of it

B) Paint over the rust

C) Refill it with refrigerant

D) Use it only for recovery

18 / 40

18) Describe ways you can visually look for leaks.

A) Using soap bubbles

B) Excessive superheat, caused by low refrigerant charge

C) Looking for traces of oil

D) All the above

19 / 40

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

A) Wearing personal protective equipment (PPE)

B) Using a ladder

C) Wearing hearing protection

D) Wearing a harness

20 / 40

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

A) Use a vacuum pump

B) Drain the oil

C) Use a refrigerant recovery machine

D) Heat and tap the compressor with a mallet

21 / 40

21) 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) 0 inches Hg

B) 15 inches Hg

C) 4 inches Hg

D) 10 inches Hg

22 / 40

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

A) Leaks over 50 pounds must be repaired

B) None of the above

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

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

23 / 40

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

A) 5 psig

B) 10 psig

C) 20 psig

D) 15 psig

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) How should a water box be leak tested?

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

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

C) Test the water for traces of refrigerant

D) Look for bubbles in the water

26 / 40

26) 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) 50

D) 0

27 / 40

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

A) Expansion valve

B) Thermostat

C) Pressure relief valve

D) Pressure gauge

28 / 40

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

A) R-134A

B) R-22

C) R-500

D) R-12

29 / 40

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

A) Cleans the air. Replace monthly.

B) Dryer’s air filters. Replace yearly.

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

D) To filter the oil. Change every year.

30 / 40

30) 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

31 / 40

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

A) Pressurize the system

B) Charge the system

C) Evacuate the system

D) Recover the refrigerant

32 / 40

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

A) You can see moisture bubbles

B) You can see gas bubbles

C) Sight glass is clear

D) Look for color changes of the refrigerant

33 / 40

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

A) Control the flow of refrigerant

B) Absorb heat from the refrigerant

C) Increase the pressure of the refrigerant

D) Reject heat from the refrigerant

34 / 40

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

A) Heater blankets

B) a and b

C) None of the above

D) Controlled hot water

35 / 40

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

A) To ensure proper pressure

B) To allow for expansion of the refrigerant

C) To avoid contamination

D) To prevent leaks

36 / 40

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

A) Increase refrigerant temperature

B) Reduce pressure

C) Control refrigerant flow

D) Remove moisture and contaminants

37 / 40

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

D) To filter the oil. Change every year.

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) 35

B) 50

C) 15

D) 0

39 / 40

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

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

B) Low pressure appliances

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

D) Refrigerators, freezers, and vending machine appliances

40 / 40

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

A) A restriction at the TXV

B) A leak

C) An overcharge

D) Excessive oil in the system

Your score is

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