EPA Universal 608 Test

What type of refrigerant is chlorine free?

Refrigerant migrates to the compressor crankcase because of a difference in ________ between the refrigerant and the oil

Which refrigerant is an HCFC? R-22, R-134a, R-410a, R-12

Which Refrigerant is an HCFC? R-124, R-134A, R410a, R-12

What factor(s) affects the speed of evacuation?

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

HCFC refrigerants contain:

Manifold gauge sets are often color coded, when this is done, the low pressure gauge is color coded:

After refrigerant liquid transfer between recovery unit and the system being emptied, you need to avoid trapping:

When can you use a disposable cylinder to recover refrigerant?

CFC refrigerants are so named because they contain the elements:

Recovery equipment that relies upon the compressor in the system would be considered:

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

When dealing with small systems, how many different refrigerants may be recovered in the same cylinder?

It is important not to mix different refrigerants in the same container because:

Chlorofluorocarbons (CFC's) and hydrochlorofluorocarbons (HCFC's) have which of the following in common?

Refrigerant that is recovered can be returned to:

An example of a HFC refrigerant is:

When transporting cylinders containing used refrigerant, the DOT requires that you:

Blended refrigerants leak from a system:

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

Long hoses between the unit and the recovery machine should not be used because they cause:

If corrosion is found within the body of a relief valve, the valve must be:

Disposable refrigerant containers are used for ______ refrigerant.

Never use an open flame to heat a refrigerant tank because

If an oil is hygroscopic it means that it:

The type of oil that is most commonly used in stationary refrigeration applications w/ HFC-134a refrigerant is:

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

Ozone depletion in the Stratosphere is what type of problem?

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

Under the EPA's " safe disposal requirements ", who is responsible of making sure that the refrigerant is removed from household refrigerators before they are disposed of:

Ozone depletion potential, or "ODP," is

_______ is the process of removing refrigerant in any condition from a system and storing it in a container without necessarily testing or processing it in any way.

The EPA can require a technician to demonstrate their ability to perform proper procedures for recovering and/or recycling refrigerant. Failure to demonstrate competency can result in:

Never use oxygen or compressed air to pressurize a system because:

Which of the following is an approved "drop-in" service replacement for R-12? HFC-134a, HFC-410a, R-407c, according to the EPA there are no "drop-in" replacements

The synthetic lubricant presently used with ternary blends containing HCFCs is 

On a typical three port ( three hose) manifold gauge, the center port is used for:

What refrigerant type has the highest ozone depletion potential?  HCFCs, HFCs, CFCs

What refrigerant has the lowest ozone depletion potential? R-22, R-11, R-12, or R-113

Which refrigerants must be recovered before opening a system or disposing of a system?

When dehydrating a system, the system can be heated to

Use _______ to remove ice from the sight glass.

What atom of the CFC molecule causes ozone depletion?

Refrigerant vapors or mist should not be inhaled because:

The high pressure gauge on service manifold sets has a continuous scale, usually calibrated to read from:

P.P.E.'s (gloves, safety glasses, safety shoes, etc.) should always be worn is when:

"Self-contained" recovery devices:

It is necessary to place a refrigerant label on:

Before you dispose of any system containing a refrigerant, you must:

Refrigerant leaves the condenser of an operating system as a:

Non-Azeotropic refrigerants leak from a system:

Whe using nitrogen to pressurize a system, you should always:

All recovery equipment currently being made is required to have

The color code for approved refrigerant recovery cylinders is 

All devices used for refrigerant recovery must:

Which of the following gases help form the earth's protective shield? chlorine, chlorides, carbon monoxide, stratosphere ozone

Refrigerant cylinders should always be:

It is illegal to:

When using nitrogen in a system, when is it a violation of the EPA prohibition on venting?

An award of up to what amount may be paid to a person supplying information that leads to a penalty against the technician who is intentionally venting?

Ester based oils can be mixed with:

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

A compound pressure gauge, typically used on the low side of the system, measures pressure in:

Which of the following human health effects could result from an increase in ultraviolet radiation?

When a system will not hold a vacuum after it has been evacuated, then:

You can determine safe pressure for leak testing a system from the:

Systems charged with R-410a should be leak checked with:

Which chemicals are controlled by the Montreal Protocol? chlorofluorocarbons, hydrochlorofluorocarbons, halons

After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from:

A ternary refrigerant blend is a ____ part mixture. two, three, four or five

Reusable refrigerant containers that are normally under any pressure above 15 psig, must be hydrostatically tested and date stamped every:  1yr, 2yr, 3yr or 5yr

Refrigerant recovery during low ambient temperatures will:

What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?

A system is dehydrated to:

What refrigerant listed is a "low-pressure refrigerant" under EPA's refrigerant recycling regulations?  R-22, R-123, R-134a or R-500

Which of the following is a "high-pressure refrigerant" under EPA's refrigerant recycling regulations?  R-11, R-22, R-113 or R-123

When dealing with small systems, how many different refrigerants may be recovered into the same cylinder?

The evacuation of a system is a method of:

This chemical was found in the upper stratosphere and that indicates that the ozone layer is being destroyed.  chlorine monoxide, carbon monoxide, carbon dioxide, or nitrogen dioxide

Which refrigerant contains a CFC?  R-12, R-22, R-134a, R-410a

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

According to the EPA, an oil sample should be taken for which of the following reasons? a new filter-drier has been installed, the system had a leak or a major component failure, system not cooling properly, recycled refrigerant was added to the system

A refillable refrigerant cylinder must never be filled to more than _______ of its capacity by weight:

Which of the following is a "very high-pressure refrigerant" under EPA's refrigerant recycling regulations?  R-22, R-134a, R-13, R-500

In a vapor compression refrigeration system, cooling occurs when:

What statement is true about an azeotropic refrigerant mixture? it is always made from just two components., it ha a pressure-temperature curve identical to one of its components., it is a mixture that is always made from at least three component refrigerants., it is a mixture that acts like a single-component refrigerant over its entire range.

What is one of the most serious results of damage to the ozone layer?

When moisture exists in an operating system, which of the following is the most likely to occur? copper tubes and fittings will rust, compressor discharge valves will freeze up, acid will form, compressor head pressures will rise

Each chlorine atom in the stratosphere ca destroy ______ ozone molecules.

State and local governments can make state laws that:

It is important not to mix R-22 and R-410a refrigerants in the same container because

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

To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:

What is the best proof that CFCs are in the stratosphere?

During servicing of a refrigeration system containing R-22, the refrigerant must be:

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

Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as volcanoes because:

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

According to ASHRAE's 1992 refrigerant safety classification, which of the following designations would be the most safe? A-1, 
A-3, B-1, B-3

In general, blended refrigerants should be charge:

Equipment covered by EPA regulations include

Which atom of the CFC molecule causes ozone depletion? fluorine, chlorine, sodium, helium

The proper method of discarding a disposable refrigerant cylinder is to:

A hermetic compressor must never be operated when:

Of the items listed below, which is (are) violation(s) 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 preparing appliances

When evacuating a system, the hoses should be:

To obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should be located:

Refrigerant that enters the expansion or throttling device (also known as the metering device) is a: saturated vapor, superheated vapor, mixture of vapor and liquid, liquid

Even though R-22 is considered non-toxic, it:
is lighter than air, can cause asphyxia, is a class I refrigerant, can be detected by its color

R-410A is not a typical blended refrigerant because:  it is a near azeotropic refrigerant., it can be charged as either a liquid or vapor., while it has a 400 series refrigerant number it behaves like a 500 series refrigerant

Never overfill refrigerant storage cylinders because:

Of the refrigerants listed below, which has the lowest ozone depletion potential?  R-22, R-11, R-12, R-113

Which refrigerant contains a CFC? R-500, R-410A, R-134A, R123

Which refrigerant is an HCFC?  R-123, R-134A, R-410A, R-12

Of the refrigerants listed, which has the lowest ozone depletion potential? R-22, 
R-123, R-134A, R-502

"Self-contained" recovery devices:

The Montreal Protocol is:

What gas(es) would cause the least damage to the environment during a leak check? dry nitrogen and R-22, dry nitrogen and R-12, compressed air and R-12, dry nitrogen

According to the EPA, a _______ leak detection method is considered to be the most effective for locating the general area of a small leak.

Measuring the system's final vacuum is always done with:

Which safety precaution(s) should always be followed: never apply an open flame to a refrigerant cylinder, never cut or weld any refrigerant line when refrigerant is in the line, never use oxygen to purge lines or to pressurize a system

If a technician has a system where some R-502 was added to an R-22 system. The technician should:

What refrigerant(s) must be recovered before opening a system or disposing of a system?

During servicing of a refrigeration system containing R-12, the refrigerant must be: 

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

According to the EPA, when dealing with customer complaints regarding additional costs due to refrigerant recovery efforts, the technician should:

Refrigerant entering the compressor of a refrigeration system is a:

According to EPA regulations, which of the following procedures is not an approved technique for system cleanup after a burnout?
Installing a suction-line filter-drier, flushing with liquid refrigerant to clean tubing, triple evacuation, deep vacuum evacuation