Epa 608

Front 1

Refrigeration technicians who violate the Clean Air Act can:

Back 1

Lose their epa cert, be fined, &be required to appear in federal court ( all of the above)

Front 2

Which refrigerant is an HCFC?

Back 2

R-124

Front 3

Disposable refrigerant containers are used for______ refrigerant.

Back 3

Virgin

Front 4

A system considered dehydrated when:

Back 4

The vacuum indicator shows you have reached and held the required finished vacuum

Front 5

An example of an HFC refrigerant is:

Back 5

R-134a

Front 6

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

Back 6

Recovery & recycling

Front 7

Refrigerant that is recovered can be returned to:

Back 7

The same system or other systems owned by the same person without restriction.

Front 8

Refrigerant can not be called "reclaimed" unless it

Back 8

Had been chemically analyzed and the refrigerant meets the ARI-700 purity standard.

Front 9

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

Back 9

Revocation of the technician's certification

Front 10

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

Back 10

Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine or bromine reacts with ozone causing it to change back to oxygen thus destroying the ozone layer.

Front 11

What statement is true about an azeotropic refrigerant mixture?

Back 11

It is a mixture that acts like a single component refrigerant over its entire range

Front 12

Chlorofluorocarbons(CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common?

Back 12

Must be recovered before opening or disposing of appliances

Front 13

Scrap a disposable cylinder the internal cylinder pressure should be reduced to at least:

Back 13

0 psig

Front 14

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

Back 14

Red

Front 15

In general Blended refrigerant should be charged:

Back 15

As a liquid

Front 16

Blended refrigerants leak from a system:

Back 16

In uneven amounts due to different Vapor pressures

Front 17

Which of the following gases help form the Earth's protective shield?

Back 17

Stratospheric ozone

Front 18

In a refrigerant system the device that changes a low pressure Vapor to a high pressure vapor is the:

Back 18

Compressor

Front 19

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

Back 19

All of the above

Front 20

Which atom of the CFC molecule causes ozone depletion?

Back 20

Chlorine

Front 21

The ozone layer protects the Earth from:

Back 21

Ultraviolet radiation from the Sun

Front 22

When using with any solvent cleaner chemical refrigerant you should review:

Back 22

MSDS

Front 23

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

Back 23

$10,000

Front 24

The Montreal protocol is

Back 24

A treaty among nations that control production of CFCs and HCFCs

Front 25

Which refrigerant is an HCFC?

Back 25

R-123

Front 26

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

Back 26

Increases in human skin cancer

Front 27

Of the refrigerants listed below which has the lowest ozone depletion potential?

Back 27

R-22

Front 28

To determine the maximum allowable pressure to use when checking a system check

Back 28

The design pressure on the equipment nameplate

Front 29

To determine the maximum allowable pressure to use when checking a system check

Back 29

The design pressure on the equipment nameplate

Front 30

Ozone depletion potential or ODP is

Back 30

A measure of the ability of CFCs and HCFCs to destroy ozone

Front 31

Whenever dry nitrogen from a portable cylinder is connected to a system what item is of most important in consideration of Safety?

Back 31

There is a relief valve in the downstream line from the pressure regulator

Front 32

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

Back 32

Recovered

Front 33

Which safety precaution(s) should always be followed

Back 33

All of the above never apply an open flame to refrigerant cylinder never cut weld any refrigerant line when refrigerant is in the line never use oxygen to purge lines or to pressurize a system

Front 34

In a vapor compression refrigeration system cooling occurs when:

Back 34

Refrigerant liquid turns to a vapor

Front 35

The evacuation of a system is a method of

Back 35

Dehydration

Front 36

Each chlorine atom in the stratosphere can destroy _____ ozone molecules

Back 36

100000

Front 37

An example of a HFC refrigerant is

Back 37

R-410a

Front 38

Which gas(es) would cause the LEAST damage to the environment during a leak check?

Back 38

Dry nitrogen

Front 39

Refrigerant migrates to the compressor crankcase because of a difference in _______ between the refrigerator and the oil

Back 39

Vapor pressure

Front 40

Which refrigerant is an HCFC?

Back 40

R-22

Front 41

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

Back 41

The mixture may be impossible to reclaim

Front 42

When using Recovery Unit The Fill level of the recovery tank can be controlled by

Back 42

All of the above a mechanical float switch and electronic shut off device weight

Front 43

Which of the following refrigerants releases is a violation of the EPA prohibition on venting?

Back 43

Release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charge Appliance to leak check the appliance.

Front 44

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

Back 44

An increase in cataracts cases

Front 45

Never use an open flame to heat a refrigerant tank because

Back 45

All the Above can result in venting refrigerant to the atmosphere tank may explode causing Serious injury to people nearby refrigerant tank may decompose forming a toxic material

Front 46

When transporting cylinders containing used refrigerant the DOT requires that you

Back 46

Attach DOT classification tags

Front 47

According to a ASHRAEs 1992 refrigerant safety classification which of the following designations would be the most safest?

Back 47

A1

Front 48

The over evacuation of a system

Back 48

Does not occur

Front 49

Equipment covered by EPA regulations include

Back 49

All air conditioning and Refrigeration equipment using CFC HCFC or HFC refrigerants

Front 50

Never overfill refrigerant storage cylinders because

Back 50

The internal pressure of the cylinders may rise in heated areas and cause an explosion

Front 51

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

Back 51

The mixture may be impossible to reclaim

Front 52

Manifold gauge sets are often colour-coded when this is done the low pressure gauge is color coded

Back 52

Blue

Front 53

All devices used for refrigerant recovery must

Back 53

Meet EPA standards

Front 54

Reusable refrigerant containers that are normally under any pressure above 15 PSIG must be hydrostatically tested and date stamped every

Back 54

5 years

Front 55

Which refrigerant must be recovered before opening a system or disposing of a system

Back 55

All refrigerants must be recovered (R-410a,R-470c,R-134a)

Front 56

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

Back 56

As far from the vacuum pump as possible

Front 57

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

Back 57

Measurement of CFCs in air samples from the stratosphere

Front 58

The recovery of refrigerant is necessary to

Back 58

All of the above maintain adequate supplies for service calls after the production bans prevent the venting of refrigerants to the atmosphere prevent stratospheric ozone depletion

Front 59

an example of an HFC refrigerant is

Back 59

R-410a

Front 60

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

Back 60

PSIG and inches of mercury

Front 61

________Refers to the process of cleaning refrigerant by-Oil separation and single or multiple passes through filter driers which reduce moisture and acidity?

Back 61

Recycling

Front 62

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

Back 62

0 - 500 PSI

Front 63

______Is the process that returns refrigerant to new product specification and that requires chemical analysis?

Back 63

Reclaim

Front 64

A cylinder with a gray body and a yellow top indicates that the cylinder is designed to hold

Back 64

Recovered refrigerant

Front 65

HCFC refrigerants

Back 65

Are less harmful to stratospheric Ozone than CFCs

Front 66

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

Back 66

Refrigerants containing bromine

Front 67

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

Back 67

electronic or ultrasonic testers

Front 68

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

Back 68

All of the above excessive pressure drop increase recovery time increased emissions

Front 69

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

Back 69

System dependent

Front 70

A hermetic compressor must never be operated when

Back 70

There is a dehydration vacuum in the system

Front 71

Self contained recovery devices

Back 71

Can capture liquid and or vapor refrigerant without the assistance of components in the air conditioning or Refrigeration equipment

Front 72

System charged with R-410A should be leak checked with:

Back 72

Pressurized nitrogen

Front 73

R-410A is not a typical blended refrigerant because:

Back 73

All of the above are true

Front 74

A ternary refrigerant blend is a ______ part mixture.

Back 74

Three part

Front 75

In a refrigerant system high pressure vapor is converted to high pressure liquid in the:

Back 75

Condenser

Front 76

Which of the following is an approved "drop-in" service replacement for R-12?

Back 76

According to the EPA there are no drop-in replacements

Front 77

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

Back 77

Assure that all is recovered and that the cylinder is rendered useless then recycle the metal

Front 78

CFC refrigerants are so named because they contain the elements

Back 78

Chlorine fluorine carbon

Front 79

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

Back 79

Recover the refrigerant

Front 80

According to EPA regulations which of the following procedures is not an approved technique for system cleanup after a burnout?

Back 80

Flushing with liquid refrigerant to clean tubing

Front 81

When using nitrogen to pressurize a system you should always

Back 81

Charge through a pressure regulator

Front 82

What effects can ozone depletion have on the environment?

Back 82

All of the above reduced crop yields reduced marine life increased ground level ozone

Front 83

Non Azeotropic refrigerant leak from a system

Back 83

In uneven amounts due to different Vapor pressures

Front 84

An example of an HCFC refrigerant is

Back 84

R-22

Front 85

Which chemicals are controlled by the Montreal protocol?

Back 85

All of the above chlorofluorocarbons Hydrochlorofluorocarbons halons

Front 86

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

Back 86

Pressurized nitrogen

Front 87

When is the system the hoses should be

Back 87

Equal to or larger than vacuum pump Inlet connection

Front 88

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

Back 88

November 1995

Front 89

Never use oxygen or compressed air to pressurize a system because

Back 89

Oxygen and compressed air do not mix with refrigerant

Front 90

Refrigerant cylinder should always be

Back 90

Free of rust damage color coded to indicate the content and secure all the above

Front 91

Even though R-22 is considered non toxic it:

Back 91

Can cause asphyxia

Front 92

A system is dehydrated to:

Back 92

Remove water and water vapor

Front 93

According to the EPA of the refrigerants listed below which type of refrigerant will not contribute to global warming?

Back 93

They all contribute to global warming

Front 94

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

Back 94

Ester oil

Front 95

Technicians receiving a passing grade on the type 2 medium pressure high pressure and very high pressure exam are certified to recover refrigerant during the maintenance service or repair of a medium and high pressure equipment and very high pressure refrigerants including

Back 95

With type 2 certification you are certified for all very high pressure refrigerant including CFC 13 and CFC 503

Front 96

Personal protective equipment gloves safety glasses Safety Shoes should always be worn when

Back 96

Handling and filling refrigerant cylinders

Front 97

Refrigerant Vapors or Mist should not be inhaled because

Back 97

They may cause heart irregularities and or unconsciousness

Front 98

Of the items listed below which is are violation of the clean air act?

Back 98

All of the above falsifying or failing to keep required records failing to reach required evacuation levels before opening or disposing of appliances knowingly releasing CFC HCFC refrigerants or their substitute while repairing appliances

Front 99

HFC refrigerants contain

Back 99

Hydrogen fluorine carbon

Front 100

Which refrigerant contained an HCFC?

Back 100

R-22

Front 101

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

Back 101

System dependent

Front 102

Refrigerant entering the compressor under normal operating conditions is a

Back 102

Low-pressure vapor

Front 103

It is necessary to place a refrigerant label on

Back 103

A refrigerant cylinder which is being returned for reclaiming

Front 104

Which refrigerant contains a CFC?

Back 104

R 500

Front 105

Used ______ to remove ice from a sight glass

Back 105

An alcohol spray

Front 106

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

Back 106

The system had a leak or a major component failure

Front 107

The EPA requires the installation of a service aperture or process stub on all appliances using a Class 1 or Class 2 substance as a refrigerant. The main purpose of this requirement is to make it easier to

Back 107

Recover refrigerant

Front 108

Recycling and Recovery equipment intended for use with air conditioning and Refrigeration equipment except for small appliances must be tested under

Back 108

ARI-740

Front 109

Refrigerant entering the compressor of a refrigeration system is a

Back 109

Superheated vapor

Front 110

What is being done in the US to stop damage to the stratospheric ozone layer

Back 110

Capturing and ultimately eliminating use of chlorofluorocarbons

Front 111

The type of oil that is most commonly used in stationary Refrigeration applications with HFC -134a refrigerant is

Back 111

Ester oil

Front 112

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

Back 112

Temperature Glide

Front 113

Which refrigerant contains a CFC?

Back 113

R 12

Front 114

Under epa's regulations what standard must reclaimed refrigerant meet before it can be resold

Back 114

ARI 700

Front 115

An example of a HFC refrigerant is

Back 115

R-134a

Front 116

It is illegal to

Back 116

Knowingly releasing refrigerant during the service maintenance repair or disposal of appliances with the exception of de minimis releases

Front 117

Which type of refrigerant is the most harmful to stratospheric Ozone

Back 117

CFC

Front 118

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

Back 118

Liquid

Front 119

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

Back 119

All of the above recover recycle refrigerant keep system tight find and repair leaks

Front 120

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

Back 120

Final person in the disposal chain

Front 121

Which refrigerant listed below is a low pressure refrigerant under EPA Refrigerant recycling regulations

Back 121

R-123

Front 122

When moisture exits in an operating system which of the following is most likely to occur

Back 122

Acid will form

Front 123

Which of the following is a very high pressure refrigerant under epa's refrigerant recycling regulations

Back 123

R-13

Front 124

When using nitrogen to pressurize a system you should

Back 124

Only charged with nitrogen vapor

Front 125

Of the refrigerants listed below which has the lowest ozone depletion potential

Back 125

R-134a

Front 126

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

Back 126

Only one

Front 127

When operating refrigerant recovery or recycling equipment the following precautions should always be followed

Back 127

All of the above wear safety glasses protective gloves follow all safety precautions for the equipment

Front 128

Other refrigerants listed below which type of refrigerant will not damage stratospheric ozone

Back 128

HFCs

Front 129

When evacuating a system the hoses should be

Back 129

A short in length and as long in diameter as possible

Front 130

Refrigerant leaves the condenser of an operating system as a

Back 130

High pressure liquid

Front 131

Is corrosion is found within the body of a relief valve the valve must be

Back 131

Replaced

Front 132

The Clean Air Act

Back 132

All the above set a schedule for the phase-out of CFC HCFC production prohibits venting of refrigerants authorizes the EPA to set standards for Recovery of refrigerant

Front 133

Measuring the system's final vacuum is always done with

Back 133

The system isolated in the vacuum pump off

Front 134

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

Back 134

0.8

Front 135

Of the refrigerants listed below which refrigerants type have the highest depletion potential

Back 135

CFCs

Front 136

This chemical was found in the upper Stratosphere and that indicates that the ozone layer is being destroyed

Back 136

Chlorine monoxide

Front 137

What factor affects the speed of evacuation

Back 137

All of the above the size of the equipment being evacuated the ambient temperature amount of moisture in system

Front 138

HCFC refrigerants contain

Back 138

Hydrogen chlorine fluorine carbon

Front 139

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

Back 139

The system may be leaking

Front 140

All recovery equipment currently being made is required to have

Back 140

An EPA approved certification label

Front 141

The color code for Approved refrigerant recovery cylinders is

Back 141

Yellow tops and gray bodies

Front 142

When can you use a disposable cylinder to recover refrigerant

Back 142

Never

Front 143

Which of the following is a high pressure refrigerant under epa's refrigerant recycling regulations

Back 143

R-22

Front 144

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

Back 144

Liquid refrigerant between service valves

Front 145

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

Back 145

Low side test pressure data plate value

Front 146

If a technician has a system where some R502 was added to an R22 system the technician should

Back 146

Recover all refrigerant into a separate tank

Front 147

Ozone in the stratosphere above the Earth consists of

Back 147

Molecules of 3 oxygen atoms

Front 148

The size capacity of the vacuum pump and the size of the suction line used will determine

Back 148

The length of dehydration time

Front 149

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

Back 149

All of the above

Front 150

State and local governments can make state laws that

Back 150

Follow the Clean Air Act EPA regulations contain stricter regulations than the Clean Air Act EPA regulations

Front 151

If an oil hygroscopic it means that it

Back 151

Readily absorbs moisture

Front 152

When dehydrating a system the system can be heated to

Back 152

Decrease the dehydration time

Front 153

Synthetic lubricant presently used with ternary blends containing HCFCs is

Back 153

Alkylbenzene

Front 154

Ozone depletion in the stratosphere is what type of problem

Back 154

Global

Front 155

Typical three port three hose manifold gauge the center Port is used for

Back 155

Recovery evacuation and charging

Front 156

Ester based oils can be mixed with

Back 156

No other oils

Front 157

CFCs will no longer be manufactured or imported into the United States after

Back 157

1995

Front 158

Which type of refrigerants are chlorine free

Back 158

HFCs

Front 159

Refrigerant recovery during low ambient temperatures will

Back 159

Slow the recovery process

Front 160

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

Back 160

Recovering

Front 161

Containers designated refillable by DOT are used for transporting recovered pressurize refrigerant

Back 161

To meet safety requirements