EPA 608 Test 2023-2024 Actual Exam Questions and Correct Detailed Answers with Rationales

Which refrigerant contains no chlorine?

Name the refrigerant types that belong to CFCs, HCFCs and HFCs

The rule of thumb for refilling approved cylinders is a maximum of ___ percent liquid?

What do the letters in HCFC stand for?

To recover refrigerant is to?

What is ODP?

R-134A is a drop in refrigerant for?

Name some of the health and environmental effects of ozone depletion.

The condition and state of the refrigerant leaving a receiver is?

What evidence do we have that CFCs and HCFCs are depleting the ozone?

The component of an air conditioning system that changes a low pressure vapor to a high pressure vapor is the?

What characteristics make it easy for CFCs to reach the stratosphere and how do they get there?

Why do we now use R-134a refrigerant?

What is the purpose of the CAA?

What three things is the CAA doing to control chlorofluorocarbon emissions?

What can states do in addition to the CAA?

What three things can happen if you violate the CAA?

What incentive do others have to turn you in for violating the CAA?

Who can purchase refrigerants and what size cylinders can be purchased?

What is the Montreal Protocol?

What chemicals does the Montreal Protocol control?

When was the CFC phase out date?

Where do CFC refrigerants come from for equipment servicing of older systems?

What must be done before scrapping a refrigerant container?

What must be done before disposing of an appliance containing CFCs or HCFCs?

Who is responsible for removing refrigerants from a system that is being disposed of?

Are there drop-in replacements for R-12 systems and if not, why?

What type of oil is used in R-134a and what oils will mix with it?

Will the gases in a ternary blend leak at the same rate and why or why not?

What does a compressor compress?

Explain how cooling of a space occurs in a refrigeration cycle

Will refrigerant migrate to the crank case in a compressor?

What color is the compound gauge and what does the compound gauge measure?

What color is the high pressure gauge?

What are three things the center hose is used for and what color is it usually?

What things should you look for in equipment and systems to help limit refrigerant emissions?

What is the most effective method for checking for small leaks?

How can you test a system for leaks?

What should you look for if a compressor burns out?

What will need to happen if the oil has been contaminated by a burnout?

How is recovery different from recycling?

How is recycling different from reclaiming?

Name reasons recovery is important?

What standards must refrigerant recovery equipment meet?

What are types of recovery equipment used?

What should you tell a consumer who complains about the added cost and time of recovering refrigerant?

How should you handle recovery of a system that has mixed refrigerants?

After recovery, what are nitrogen and a filter drier used for?

What are the variables that affect the recovery rate?

Why is it important to have faster recovery?

If you smell a strong odor during recovery, what is most likely the problem?

Why is it necessary to dehydrate a refrigeration system?

What happens if moisture is left in an operating refrigeration system?

What must be done before starting evacuation?

What are the four factors that affect the evacuation time?

Can you increase the temperature of a refrigeration system for evacuation and if so, what purpose does it have?