Epa

Front 1

Refrigerant

Back 1

Any solid, liquid, or vapor that cools heat from another body or substance by absorbing it.

Front 2

Refrigeration

Back 2

The process of cooling or removing heat.

Front 3

What was the first refrigerant?

Back 3

Water

Front 4

Refrigerants are special chemical mixtures, grouped under a standard numbering system and referred to by. ..

Back 4

CFC, HCFC, HFC, or R alpha-numeric indicator

Front 5

The most common refrigerant?

Back 5

Halocarbons

Front 6

What's the four most common halocarbons refrigerants?

Back 6

R-12, R-22, R-500 and R-502

Front 7

Desirable characteristics of a good, safe refrigerant?

Back 7

1. High latent heat value

2. Nontoxic

3. Non-flammable

4. Noncorrosive

5. Environmentally acceptable

6. Chemically stable

7. Lubricant soluble

8. Easily handled and transported

9. Detectable at low concentrations

10. Field system charging ability

Front 8

What is CFC?

Back 8

Chlorofluorocarbon

Front 9

What does CFC contain?

Back 9

Chlorine, fluorine, and carbon

Front 10

Three of the most common type of CFCs?

Back 10

R-11, R-12, R-114

Front 11

CFCs are known to deplete ________.

Back 11

Stratospheric ozone

Front 12

What does HCFC stand for?

Back 12

Hydrochlorofluorocarbons

Front 13

What does HCFC contain?

Back 13

Hydrogen, chlorine, fluorine, and carbon

Front 14

Most common HCFC?

Back 14

R-22

Front 15

What makes HCFC less stable after they enter the atmosphere?

Back 15

Hydrogen

Front 16

What is HFC?

Back 16

Hydrofluorocarbons

Front 17

HFC contains what elements?

Back 17

Hydrogen, fluorine and carbon

Front 18

HFCs do not deplete the ozone layer because they do not contain___________.

Back 18

Chlorine

Front 19

R-12 (CFC) is being replaced by __________.

Back 19

R-134a (HFC)

Front 20

Ozone depletion potential of R-134a is _______ because it has no _________.

Back 20

Zero, chlorine

Front 21

A blend of two refrigerants that form a single refrigerant compound having a boiling point independent of the individual refrigerants?

Back 21

Azeotropic Blend

Front 22

A blend of three individual refrigerants having characteristics similar to a particular refrigerant.

Back 22

Ternary blend

Front 23

A term associated with refrigerant blends leaking from a refrigeration system at different rates because the individual refrigerant components have different vapors pressures.

Back 23

Fraction

Front 24

Two types of refrigerant oil

Back 24

Mineral and synthetic

Front 25

The compounds in refrigerant mineral oil can be categorized into what three main groups?

Back 25

1. Paraffinic

2. Naphtha nick

3. Aromatic

Front 26

A refrigerant oil that has a high affinity for water is considered _________.

Back 26

Hygroscopic

Front 27

What mineral oil is commonly used in navy systems?

Back 27

ROC-2 (VVL-825 Type 2)

Front 28

Three of the most popular synthetic oils are:

Back 28

1. Alkylbenzenes

2. Glycols

3. Polyesters (Esters)

Front 29

True or False

Different types of refrigerant oils should not be mixed.

Back 29

True

Front 30

Two ozone layers are?

Back 30

Stratospheric and tropospheric

Front 31

The stratospheric ozone is the area of the atmosphere between __ to __ miles above the earth.

Back 31

7 to 30 miles

Front 32

Ozone in the stratosphere above the earth consists of molecules containing __ oxygen atoms.

Back 32

3

Front 33

The tropospheric level is the area in the atmosphere from ___ to ___ miles above.

Back 33

Ground (0) - 7 miles

Front 34

The elements in refrigerants that causes ozone depletion is ______

Back 34

Chlorine

Front 35

The chemical found in the upper stratosphere indicating ozone depletion is _________________.

Back 35

Chlorine monoxide

Front 36

The rise in the amount of _________ measured in the stratosphere during the past two decades matches the rise in the amount of _________.

Back 36

Chlorine, fluorine

Front 37

It is also determined that the rise in the amount of __________ measured in the stratosphere over the past two decades matches the rise in ______ emissions during the same period.

Back 37

Chlorine, CFC

Front 38

Estimates indicate that up to __________ ozone molecules can be destroyed by a single chlorine atom.

Back 38

100,000

Front 39

Name 3 effects of ozone depletion to the human body.

Back 39

1. Increased cases of skin cancer

2. Increased cases of cataracts

3. Weakening of the immune system

Front 40

Name 3 effects of ozone depletion to the environment.

Back 40

1. Affects the growth and reproduction of phytoplankton

2. Reduce crop yields and marine life

3. Increased ground level ozone (smog)

Front 41

When did the Molina-Rowland theory start?

Back 41

1974

Front 42

The Molina-Rowland theory resulted in the United states banning the use of ____ in non essential aerosols in _____.

Back 42

CFCs, 1978

Front 43

Montreal Protocol consists of how many nations including the US?

Back 43

24

Front 44

When was the Montreal Protocol agreement signed?

Back 44

1987

Front 45

The Montreal Protocol is a treaty that controls the production, import and export of ______________, ______________, and ________________.

Back 45

Chlorofluorocarbon (CFC), halons, and hydrochlorofluorocarbons (HCFC)

Front 46

Class I, Group I consisted of which fully halogenated chlorofluorocarbons?

Back 46

1. CFC-11

2. CFC-12

3. CFC-113

4. CFC-114

Front 47

Class I, Group II consisted of what type of Halons?

Back 47

1. Halon-1211

2. Halon-1301

Front 48

Class II consists of ______________.

Back 48

Hydrochlorofluorocarbons (HCFCs)

Front 49

What refrigerants are considered "Class I refrigerants" by EPA?

Back 49

R-11, R-12, R-114, and R-500

Front 50

ODP stands for?

Back 50

Ozone depletion potential

Front 51

R-11 has an ODP value of _______?

Back 51

1.0

Front 52

The London Agreement that strengthened the montreal protocol consisted of how many nations?

Back 52

56

Front 53

In what month and year was the London Agreement signed?

Back 53

June 1990

Front 54

The Copenhagen agreement was signed to eliminate globally the use and consumption of ______ by the year ______.

Back 54

HCFCs, 2030

Front 55

The Copenhagen agreement consisted of how many nations?

Back 55

93

Front 56

The primary thrust of the Clean Air Act is to capture and ultimately eliminate the use of _______________.

Back 56

Chlorofluorocarbons

Front 57

Title VI of the CAA calls for a phaseout of _____ and ______ production.

Back 57

CFC and HCFC

Front 58

The CAA also banned the venting of CFCs and HCFCs after what date?

Back 58

July 1, 1992

Front 59

What section from the provisions of title VI of the CAA lists ozone depleting substances by class and group with the provision that the EPA will add to this list any substance which is found to have an ODP of 0.2 or greater, or any substance which EPA finds "causes or contributes significantly to harmful effects on the stratosphere ozone layer".

Back 59

Section 602

Front 60

Which section is known as the national recycling and emissions reduction program?

Back 60

Section 608

Front 61

Definition of De Minimus Release

Back 61

Minute quantities of refrigerant released to the atmosphere in the course of making GOOD FAITH ATTEMPTS to recover or safely dispose of refrigerant.

Front 62

Three types of releases permitted are:

Back 62

1. Attempts to recapture, recycle, or safely dispose of refrigerant.

2. Leaks or emission in the course of normal operation

3. Mixtures of nitrogen and R-22 that are permitted as holding charges our as a leak test gases

Front 63

Five main requirements for recycling, emissions, reduction and disposal of Class I and Class II substances issued by EPA under section 608.

Back 63

1. Technicians must observe certain practices

2. EPA certified

3. Certified Equipment only

4. Require the repair of substantial leaks

5. Require the proper removal and recovery of ODS

Front 64

Five main requirements for recycling, emissions, reduction and disposal of Class I and Class II substances issued by EPA under section 608.

Back 64

1. Technicians must observe certain practices

2. EPA certified

3. Certified Equipment only

4. Require the repair of substantial leaks

5. Require the proper removal and recovery of ODS

Front 65

Two types of refrigerant that can be sold.

Back 65

Virgin and reclaimed

Front 66

Three violations of the CAA

Back 66

1. Knowingly releasing CFC or HCFC refrigerants while repairing appliances.

2. Falsifying or failing to keep required records.

3. Failing to reach required evacuation levels before opening or disposing of appliances.

Front 67

Three penalties for violating the CAA

Back 67

1. May lose certification

2. May be fined

3. May be required to appear in federal court.

Front 68

Whistle blowers who supply information that leads to a penalty against a technician who is intentionally venting may receive an award up to __________?

Back 68

$10,000

Front 69

A fine of up to ___________ per day per violation may result from violations of the CAA.

Back 69

$27,500

Front 70

Name 3 good service practices.

Back 70

1. Finding and repairing leaks

2. Keeping systems tight

3. Recovering and recycling refrigerant

Front 71

What type of repairs include those involving removal of the compressor, condenser, evaporator or auxiliary heat exchanger coil.

Back 71

Major Repairs

Front 72

What type of repairs involve an operation on equipment that is not followed by an evacuation top the environment like replacement of pressure switches, relays, etc.

Back 72

Minor repairs

Front 73

Failure of a system to hold a vacuum after evacuation indicates what.

Back 73

A leak may exist in the system

Front 74

Whenever a system is opened for servicing or maintenance, the system filter drier should be ____________.

Back 74

Replaced

Front 75

What should be checked to determine a safe pressure for leak testing.

Back 75

The nameplate data for the low-side test pressure.

Front 76

_________ by itself will have the least damaging effect on the environment when ____________________.

Back 76

Nitrogen, when leak checking a unit

Front 77

Two types of methods to check for leaks.

Back 77

Soap Bubbles and electronic leak detector

Front 78

The reason for refrigeration system dehydration is to ____________.

Back 78

Remove water and vapor

Front 79

This type of testing is used to pinpoint system leaks

Back 79

Soap Bubbles testing

Front 80

Effective method for locating general area of leaks

Back 80

Electronic leak detector

Front 81

Evacuation of a system is a suggested method of ________________.

Back 81

Dehydration and leak checking

Front 82

If moisture is allowed to remain in an operating refrigeration system, what type of acids are likely to form?

Back 82

Hydrochloric, hydrofluoric

Front 83

Three factors which will affect the time needed for evacuation.

Back 83

1. Size of the equipment

2. Ambient temperature

3. Amount of moisture in the system

Front 84

When evacuating use a vacuum pump capable of pulling a vacuum of ________.

Back 84

500 microns

Front 85

A length of tubing that provides access to the refrigerant inside a small appliance or room air conditioner.

Back 85

Process stub

Front 86

Can a process stub be resealed at the conclusion of repair or service.

Back 86

Yes

Front 87

EPA is requiring that small appliances and room air conditioner sold after __________, be provided with a __________ to facilitate removal of the refrigerant at servicing.

Back 87

November 15, 1993, process stub

Front 88

Never use oxygen or compressed air to pressurize appliances to check for leaks because when when mixed with compressor oil and refrigerant they can ___________.

Back 88

Explode

Front 89

Never use oxygen or compressed air to pressurize appliances to check for leaks because when when mixed with compressor oil and refrigerant they can ___________.

Back 89

Explode

Front 90

ASHRAE Std 15 require an _____________ for A-1 refrigerants in commercial equipment rooms.

Back 90

Oxygen deprivation sensor

Front 91

ASHRAE STD 34 refrigerant safety classifies A-1 as the designation being the ______________.

Back 91

Moat safe

Front 92

Name all A-1 Refrigerants

Back 92

R-11, R-12, R-22, R-114, R-500, R-502 and HFC-134a

Front 93

To remove refrigerant in any condition from a system and store it in an external container workout necessarily testing.

Back 93

Recover

Front 94

To clean refrigerant for re-use by oil separation and single or multiple passes through devices, such as replaceable core filter driers, which reduce moisture, acidity and particulate matter.

Back 94

Recycle

Front 95

Restore refrigerant to original chemical and material specifications, verified by sampling and must conform to ARI-700 specifications.

Back 95

Reclaim

Front 96

4 reasons for recovering refrigerants

Back 96

1. Prevention of venting to the atmosphere

2. Prevention of stratospheric ozone depletion

3. Adequate supplies for service after production bans of CFCs

4. Only recovered and recycled CFC refrigerants will be available for equipment.

Front 97

Two system dependent type systems intended for small appliances

Back 97

1. Whirlpool bag

2. Amana carbon absorption system

Front 98

Refrigerant recovery devices, if manufactured after _______________, must be equipped with ____________.

Back 98

November 15, 1993, low loss fittings

Front 99

What are some methods and devices currently used for monitoring the 80% fill level in a recovery tank.

Back 99

Floaty devices, thermistors, or weighing scales

Front 100

Under no condition should a disposable cylinder be used to _________________.

Back 100

Recover refrigerant

Front 101

Disposable cylinders are used for ___________ refrigerant only.

Back 101

Virgin

Front 102

Returnable/Reusable cylinders possess a stamp on the shoulder which furnishes what information?

Back 102

1. Tare weight

2. DOT spec number

3. Test date

4. Water capacity

Front 103

Requirements for shipping refrigerant cylinders:

Back 103

1. They must be positioned upright

2. Only containers designated "refillable" by DOT are top be used to transport recovered pressurized refrigerant.

3. Check that the refrigerant container meets DOT standards.

4. Proper labeling and shipping paperwork.

Front 104

All commercial cylinders for recovering refrigerant shall have ______ colored bodies and _________ tops.

Back 104

Gray, yellow

Front 105

Navy cylinders for recovering refrigerants shall have _________ bodies and __________ shoulders.

Back 105

Orange and yellow