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)

117

EPA 608 Type 2 High or Very high Pressure Appliances

1 / 40

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

A) Reject heat from the refrigerant

B) Increase the pressure of the refrigerant

C) Control the flow of refrigerant

D) Absorb heat from the refrigerant

2 / 40

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

A) Dryer’s air filters. Replace yearly.

B) To filter the oil. Change every year.

C) Cleans the air. Replace monthly.

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

3 / 40

3) 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

4 / 40

4) 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

5 / 40

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

A) Absorb heat from the air

B) Absorb heat from the refrigerant

C) Reject heat from the refrigerant

D) Control the flow of refrigerant

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) 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

8 / 40

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

A) Recover the refrigerant

B) Pressurize the system

C) Evacuate the system

D) Charge the system

9 / 40

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

A) R-12

B) R-115

C) R-11

D) R-22

10 / 40

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

A) a and b

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

C) None of the above

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

11 / 40

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

A) To filter the oil. Change every year.

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) Dryer’s air filters. Replace yearly.

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) Use a smaller vacuum pump.

C) Increase pressure by introducing nitrogen to counteract freezing.

D) Increase pressure by introducing air.

13 / 40

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

A) Using a ladder

B) Wearing hearing protection

C) Wearing a harness

D) Wearing personal protective equipment (PPE)

14 / 40

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

A) A leak

B) Excessive oil in the system

C) An overcharge

D) A restriction at the TXV

15 / 40

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

A) None of the above

B) Controlled hot water

C) a and b

D) Heater blankets

16 / 40

16) 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

17 / 40

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

A) Reject heat from the refrigerant

B) Increase the pressure of the refrigerant

C) Control the flow of refrigerant

D) Absorb heat from the refrigerant

18 / 40

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

A) Increase refrigerant temperature

B) Remove moisture and contaminants

C) Control refrigerant flow

D) Reduce pressure

19 / 40

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

A) To avoid contamination

B) To prevent leaks

C) To allow for expansion of the refrigerant

D) To ensure proper pressure

20 / 40

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

A) Pressurize with compressed air and leak check.

B) None of the above

C) Pressurize with oxygen and leak check

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

21 / 40

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

A) Alkylbenzene oil

B) PAG oil

C) Polyolester oil

D) Mineral oil

22 / 40

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

A) Refrigerators, freezers, and vending machine appliances

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

C) Low pressure appliances

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

23 / 40

23) 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) 4 inches Hg

C) 10 inches Hg

D) 0 inches Hg

24 / 40

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

A) R-12

B) R-134A

C) R-22

D) R-500

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) Test the water for traces of refrigerant

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

D) Look for bubbles in the water

26 / 40

26) Describe ways you can visually look for leaks.

A) Looking for traces of oil

B) All the above

C) Excessive superheat, caused by low refrigerant charge

D) Using soap bubbles

27 / 40

27) 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

28 / 40

28) 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

29 / 40

29) 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) High side of the system

D) Both high and low side

30 / 40

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

A) Expansion valve

B) Thermostat

C) Pressure gauge

D) Pressure relief valve

31 / 40

31) 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) 35

C) 15

D) 50

32 / 40

32) 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 air.

D) Increase pressure by introducing nitrogen to counteract freezing.

33 / 40

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

A) You can see moisture bubbles.

B) Look for color changes of the refrigerant.

C) Sight glass is clear.

D) You can see gas bubbles.

34 / 40

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

A) None of the above

B) Both high and low side

C) Low side of the system

D) High side of the system

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) 50

C) 0

D) 15

36 / 40

36) 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) Soap bubbles.

D) Refrigerant dye

37 / 40

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

A) None of the above

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

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

D) Leaks over 50 pounds must be repaired

38 / 40

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

A) To prevent environmental harm and ensure system efficiency

B) To reduce energy consumption

C) To increase refrigerant levels

D) To avoid system shutdowns

39 / 40

39) 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

40 / 40

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

A) Check the unit label

B) Using the temperature/pressure chart

C) Manufacturer's data sheet

D) All the above