Core

The molecule found in CFCs and HCFCs that depletes ozone is:

Chlorine

CFC

Chlorine, fluorine, and carbon

Which chemicals are controlled by the Montreal Protocol?

Chlorofluorocarbons, Hydrochlorofluorocarbons, Halons

HCFC

Hydro-Chloro-Fluoro-Carbon

An example of an HCFC refrigerant is

R-22

A system is dehydrated to

Remove water and water vapor

The term used to describe the fact that a refrigerant blend has a range of boiling or condensing points at a constant pressure is

Temperature glide

An ozone molecule contains;

Three oxygen atoms

Even though R-22 is considered non-toxic, it

can cause asphyxia

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

Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?

ARI 700

Which of the following has the highest Ozone Depletion Potential?

CFC's

According to the EPA, of the refrigerants listed below, which types will not contribute to global warming?

CFC's, HCFC's, HCFs

HFC

Hydro-Fluoro-Carbon

According to the EPA, an oil sample should be taken for which of the following reasons?

The system had a leak or a major component failure.

Refrigerant that enters the expansion or throttling device, also known as the metering device, is a

Liquid

When evacuating a system, the hoses should be

equal to or larger than vacuum pump inlet connection.

A single chlorine atom can destroy how many ozone molecules?

100,000

Which ASHRAE classification means slightly flammable?

A2L

Which type of refrigerant is the most harmful to stratospheric ozone?

CFC

Before shipping any used refrigerant cylinders, check that the cylinder meets what standards:

Department of Transportation

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

Department of Transportation

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

EPA's program that identifies refrigerants with lower overall risks to human health and the environment.

HCFCs contain;

Hydrogen, Chlorine, Fluorine, and Carbon

Systems charged with R-134a should be leak-checked with

Pressurized nitrogen

Which refrigerant contains a CFC?

R-12

Which of the following refrigerants is an HFO?

R-1234ze

An example of an HFC refrigerant is

R-134a

Which refrigerant contains a CFC?

R-502

Which of the following statements would be considered good service practices for conserving refrigerant?

Recover or recycle refrigerant, Keep systems tight, Find and repair leaks.

The condenser _______________________________________

changes a high-pressure vapor to a high-pressure liquid.

A refrigerant cylinder designed to hold recovered refrigerant has a:

grey body yellow top

Refrigerant vapors or mist should not be inhaled because

they may cause heart irregularities and/or unconsciousness.

Never use oxygen or compressed air to pressurize a system because

when mixed with compressor oil or some refrigerants, it could explode.

HFCs ________;

will not damage stratospheric ozone, but have a high GWP.

The chlorine in CFCs and HCFCs:

will not dissolve in water

Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for;

Disposable cylinders

It has been illegal to vent substitutes for CFC and HCFC refrigerants since

November 1995

To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis defines;

Reclaiming

The EPA requires the installation of a service aperture or process stub on all appliances using a Class I or Class II substance as a refrigerant. The main purpose of this requirement is to make it easier to

Recover refrigerant.

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, is the definition of;

Recycle

What is being done in the U.S. to stop damage to the stratospheric ozone layer?

Replacing coal-fired power plants for the production of electricity, Capturing and ultimately eliminating use of chlorofluorocarbons, nforcing strict emission requirements on garbage incinerators.

Refrigerant entering the compressor of a refrigeration system is a

Superheated vapor

Recovery equipment that relies upon the pressure of the refrigerant in the appliance would be considered

System dependent

Recycling and recovery equipment intended for use with air-conditioning and refrigeration equipment (except for small appliances) must be tested under

ARI 740

Use _________ to remove ice from a sight glass.

Alcohol spray

The type of oil that is most commonly used in stationary air-conditioning applications with HFC-410a refrigerant is

Ester oil

Which refrigerant contains an HCFC?

R-22

It is illegal to

knowingly release any refrigerant during the service maintenance, repair. or disposal of appliances with the exception of de minimis releases.

The use and release of CFCs and HCFCs has a far reaching effect on ________.

the stratosphere

The chlorine in CFCs and HCFCs;

Will not dissolve in water

It is necessary to place a refrigerant label on

a refrigerant cylinder which is being returned for reclaiming.

Reusable refrigerant containers under high-pressure must be hydrostatically tested how often?

5 years

Of the items listed below, which is (are) violations of the Clean Air Act?

Falsifying or failing to keep required records, Failing to reach required evacuation levels before opening or disposing of appliances, Knowingly releasing CFC or HCFC refrigerants or their substitutes while repairing appliances

Refrigerant cylinders should always be

Free of rust and damage, color coded to indicate contents and secure

Which type of refrigerant contains no chlorine?

HFC's

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

HFO's

Personal protective equipment (gloves, safety glasses, safety shoes, etc) should always be worn when

Handling and filling refrigerant cylinders

HFC refrigerants contain

Hydrogen, fluorine, carbon

The low-side test-pressure data-plate value should be used by a technician to determine a safe pressure for:

Leak testing

Refrigerant that enters the compressor, under normal operating conditions, is a

Low pressure vapor

Which international agreement (Treaty) regulated the production and use of CFCs, HCFCs, halons, methyl chloroform and carbon tetrachloride?

Montreal Protocol

Technicians receiving a passing grade on the Type II (medium-pressure, high-pressure, very high-pressure) exam are certified to recover refrigerant during the maintenance, service, and repair of medium/high/very high pressure equipment including the following:

With Type II certification, you are certified for all high-pressure refrigerants including CFC-13 and CFC-503.

The compressor ____________________________________

changes a low-pressure vapor to a high-pressure vapor.

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

depletion of stratospheric ozone

Under the EPA's "safe disposal requirement", the person responsible for making sure that the refrigerant has been removed from household refrigerators before they are disposed of is the

final person in the disposal chain.