EPA 608 - Core Questions
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
Which of the following has the highest Ozone Depletion Potential?
CFCs. CFC refrigerants have the highest ozone depletion potential (ODP) and are the most harmful to stratospheric ozone.
To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis defines:
Reclaiming.
A single chlorine atom can destroy how many ozone molecules?
100,000. A single chlorine atom can last in the Stratosphere for 120 years destroying up to 100,000 ozone molecules.
Which term means to clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter driers?
Recycle. In general, recycled refrigerant is refrigerant that is cleaned using oil separation and single or multiple passes through devices, such as replaceable core filter-driers, which reduce moisture, acidity, and particulate matter.
HFCs ________.
will not damage stratospheric ozone, but have a high GWP. HFC's such as (R134a) do not contain chlorine and have no Ozone Depletion Potential but have a high Global Warming Potential (GWP).
The chlorine in CFCs and HCFCs:
will not dissolve in water. The chlorine in CFCs and HCFCs will neither dissolve in water nor break down into compounds that dissolve in water, so they do not rain out of the atmosphere.
HCFCs contain:
HCFC refrigerants contain hydrogen, chlorine, fluorine and carbon.
Which type of refrigerant contains no chlorine?
HFCs. HFCs are made up of Hydrogen, Fluorine, and Carbon. They do not contain chlorine that effects the ozone layer, but most HFCs have a high Global Warming Potential (GWP).
Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants?
HFOs. Silicone elastomers, for use in seals and gaskets, are not compatible with HFO refrigerants.
A refrigerant cylinder designed to hold recovered refrigerant has a:
grey body and yellow top.
Which ASHRAE classification means slightly flammable?
A2L. ASHRAE has grouped refrigerants by Class A (safest) or B, depending on their toxicity level to humans. Flammability is indicated by a 1 (no flammability), 2 (low flammability), or 3 (high flammability).
The molecule found in CFCs and HCFCs that depletes ozone is:
Chlorine.
Before shipping any used refrigerant cylinders, what standards should be checked?
Department of Transportation
Crop loss, eye disease and skin cancer have been attributed to:
Depletion of Stratospheric ozone
What is the Significant New Alternatives Policy (SNAP) Program?
EPA program on refrigerants with lower risks to human health and the environment.
The low-side test-pressure data-plate value should be used by a technician to determine a safe pressure for:
Leak testing. To determine the safe pressure for leak testing, check the equipment data plate for the maximum low-side test-pressure value.
An ozone molecule contains:
Three oxygen atoms. Ozone in the stratosphere consists of molecules containing 3 oxygen atoms, O3. Chlorine is the element of a CFC or HCFC molecule that causes ozone depletion. Ozone protects us from harmful ultraviolet radiation and helps maintain stable Earth temperatures.
The proper disposal method for ____________ is to recover any remaining refrigerant, render the cylinder useless and then recycle the metal.
Disposable cylinders. When discarding any disposable cylinders of CFCs, HCFCs, HFCs, or HFOs, recover all remaining refrigerant, render the cylinder useless, and recycle the metal.
Reusable refrigerant containers under high-pressure must be hydrostatically tested how often?
Every 5 years. A reusable container for refrigerant that is under high pressure (above 15 psig), at normal ambient temperature, must be hydrostatically tested every 5 years.
Which international agreement (treaty) regulated the production and use of CFCs, HCFCs, halons, methyl chloroform and carbon tetrachloride?
Montreal Protocol. Following several years of negotiations, an international agreement (treaty) regulating the production and use of CFCs, HCFC's, halons, methyl chloroform and carbon tetrachloride entered into force in mid-1989. Known as The Montreal Protocol, this landmark agreement initially required a production and consumption freeze.The United States is part of the Montreal Protocol.
Which refrigerant has a GWP closest to "1"?
R-1233zd is an HFO with a Global Warming Potential of 1.
List an example of an HFO refrigerant.
R-1234ze. Examples CFC-12, HCFC-124, HCFC-409A, HFC-134a, HC-600a, HFO-1234yf, HFO-1234ze.
The condenser:
changes a high-pressure vapor to a high-pressure liquid. The refrigerant enters the condenser as a high-temperature, high-pressure vapor. As the refrigerant expels heat, the refrigerant condenses to a high-pressure liquid. Before it leaves the condenser as a high-pressure liquid, the liquid refrigerant is subcooled to a point below the liquid saturation temperature.
The compressor ____________________________________.
changes a low-pressure vapor to a high-pressure vapor. The compressor is the heart of the vapor-compression refrigeration cycle. Low-pressure, low-temperature, superheated refrigerant vapor enters the compressor and is compressed, changing it to a high-pressure, high-temperature, superheated vapor.
