EPA 608 Core Questions Flashcards

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Questions and Answers

Which ASHRAE classification means slightly flammable?

A2 (correct)

Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants?

HFCs

HFOs (correct)

CFCs

HCFCs

HCFCs contain:

Hydrogen, chlorine, fluorine and carbon.

What does the term 'recycle' mean in refrigerant processing?

To clean refrigerant for reuse by separating the oil and removing moisture. Signup and view all the answers

List an example of an HFO refrigerant.

R-1234ze. Signup and view all the answers

Which type of refrigerant contains no chlorine?

HFCs. Signup and view all the answers

What is the Significant New Alternatives Policy (SNAP) Program?

EPA program on refrigerants with lower risks to human health and the environment. Signup and view all the answers

Before shipping any used refrigerant cylinders, what standards should be checked?

Department of Transportation. Signup and view all the answers

The low-side test-pressure data-plate value should be used for?

Leak testing. Signup and view all the answers

A single chlorine atom can destroy how many ozone molecules?

100,000. Signup and view all the answers

HFCs ________.

will not damage stratospheric ozone, but have a high GWP. Signup and view all the answers

Crop loss, eye disease, and skin cancer have been attributed to:

Depletion of stratospheric ozone. Signup and view all the answers

How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the Clean Air Act?

$44,539. Signup and view all the answers

The proper disposal method for ____________ is to recover any remaining refrigerant, render the cylinder useless and then recycle the metal.

disposable cylinders. Signup and view all the answers

Which of the following has the highest Ozone Depletion Potential?

CFCs Signup and view all the answers

Which refrigerant has a GWP closest to '1'?

R-1233zd. Signup and view all the answers

The chlorine in CFCs and HCFCs:

will not dissolve in water. Signup and view all the answers

A refrigerant cylinder designed to hold recovered refrigerant has a:

grey body and yellow top. Signup and view all the answers

An ozone molecule contains:

three oxygen atoms. Signup and view all the answers

The compressor ____________________________________.

changes a low-pressure vapor to a high-pressure vapor. Signup and view all the answers

Study Notes

ASHRAE Classifications

A2L classification indicates slightly flammable refrigerants.
Refrigerants classified by toxicity: Class A (safest) and Class B (toxic).
Flammability levels: 1 (no), 2 (low), and 3 (high).

Compatibility of Elastomers

Silicone elastomers are not compatible with HFO refrigerants.

Composition of HCFCs

HCFC refrigerants are composed of hydrogen, chlorine, fluorine, and carbon.

Refrigerant Recycling Process

Recycling involves cleaning refrigerant by separating oil and removing moisture using filter driers.
Reduces acidity, moisture, and particulate matter in refrigerants.

Examples of HFO Refrigerants

R-1234ze is an example of an HFO refrigerant.

Characteristics of HFCs

HFCs consist of hydrogen, fluorine, and carbon.
They do not contain chlorine, thus not contributing to ozone layer depletion, but have a high Global Warming Potential (GWP).

Significant New Alternatives Policy (SNAP)

The SNAP program is an EPA initiative focused on refrigerants with reduced environmental and health risks.

Standards for Shipping Used Refrigerant Cylinders

Compliance with Department of Transportation standards is required before shipping.

Leak Testing Regulations

Use the low-side test-pressure data-plate value to determine safe leak testing pressure.

Ozone Depletion by Chlorine

One chlorine atom can destroy up to 100,000 ozone molecules and can remain in the stratosphere for 120 years.

HFCs and Ozone Depletion

HFCs do not harm stratospheric ozone but have a significant Global Warming Potential.

Consequences of Ozone Depletion

Crop losses, eye diseases, and increased skin cancer are linked to the depletion of stratospheric ozone.

Fines for Clean Air Act Violations

Violators can be fined $44,539 per day for knowingly releasing regulated substances.

Disposal of Disposable Refrigerant Cylinders

Recover refrigerant before disposal, render the cylinder useless, and recycle the metal.

Ozone Depletion Potential (ODP) of Refrigerants

CFCs are known for having the highest Ozone Depletion Potential among refrigerants.

GWP of Refrigerants

R-1233zd has a GWP very close to 1, making it relatively environmentally benign.

Behavior of Chlorine in Refrigerants

Chlorine in CFCs and HCFCs does not dissolve in water, preventing it from being removed from the atmosphere via rain.

Identification of Recovery Cylinders

Refrigerant cylinders for recovered refrigerant are designed with a grey body and yellow top.

Nature of Ozone

Ozone is made of three oxygen atoms (O3) and protects against harmful UV radiation while helping stabilize Earth’s temperature.

Function of Refrigeration Compressors

The compressor in a refrigeration cycle converts low-pressure vapor into high-pressure vapor, serving a critical role in the vapor-compression process.

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Description

Test your knowledge with these core flashcards for EPA 608 certification. The quiz includes essential questions on ASHRAE classifications and refrigerant compatibility. Perfect for those preparing for HVAC certification exams.