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How much can be a paid to a person supplying information that leads to a penalty against a technician who is intentionally venting?

$10,000

What must you NEVER pressurize a system with?

-Oxygen -Compressed air

Recovery Cylinders must have what sort of certification?

-UL or -DOT approved

To reduce chance of over pressuraization/heating/explosion of recovery cylinders it cannot be filled...?

-above 80% of its capacity by weight &-the filling level be controlled by mechanical float devices, shut off or weight

If dry nitrogen from a cylinder is us in a service procedure what must you do?

-always charge through a pressure regulator -have a pressure relief valve installed downstream from the regulator

What must you do when disposing of an empty/near empty DISPOSABLE cylinder?

-attach cylinder to the recovery unit -reduce the cylinder to a vacuum -mark the cylinder empty

What does the Department of Transportations require you to attached to cylinders used for refrigerant when transporting them?

-attachd DOT classification tags on each cylinder -place a refrigerant label on each cylinder

3 things required for refillable cylinders?

-be UL or DOT approved -be hydrostatically tested -date stamped every 5 years

Inhaling refrigerants can cause...?

-heart irregularities -unconsciousness -oxygen deprivation leading to DEATH!!!!

At high temperatures R-12 will form?

-hydrochloric acid -hydropfluoric acid -Phosgene gas (change from 12 to 22)

NEVER expose CFC-12 or CFC-22 to open flame because they may form...?

-hydrocholoric acid -hydrofluoric acid -phosgene gas

Why must you never pressurize a system with oxygen or compressed air?

-if mixed with refrigerants & lubricants these can cause an explosion

Depletion of the ozone layer causes...?

-increased eye disease -skin cancer -crop loss -deforestation -reduced marine life -increased ground level ozone

Contaminants in RECYCLED refrigerant are limited to?

-moisture -refrigerant oil -and non-condesable gases to the levels set by the Society of Automotive Engineers

RECLAIMED Refrigerant?

-must meet standards of ARI 700-93 (Air conditioning and Refrigeration institute -is intended for Sale and may be used in any application

Topping off is:

-not prohibited by FEDERAL law BUT -illegal in some STATES

What two ports must recovery cylinders have?

-one vapor -one liquid

CFC-12 can NEVER be exposed to..?

-open flames or -hot glowing surfaces

When disposing of empty/near empty cylinders..?

-refrigerant MUST be recovered -attached to recovery unit & remove -once reduced from pressure to a vaccum, mark empty and ready for disposal

If rust is found on refrigerant recovery cylinders...?

-should be redueced to 0 psig -discarded

Sec. 609 of Fed. Clean air act mandates all people servicing motor vehicle AC must?

-use EPA approved Equip. -be certified in recovery procedures -never intentially vent refrigerant

How to use Nitrogen to leak test?

-use Nitrogen to pressurize the system -pin-point leaks with soap & water solution

When operating recovery or recycling equipment you should...?

-wear safety glasses -wear proective gloves -follow all safety precautions for the equpment

What are the 3 things one needs to know to replace a systems drier?

1)Type of freon 2)How big system is (tons) 3)direction of flow

Evap freeze up indicates what 3 factors?

1)improper air flow (bad fan,filter) 2)low refrigerant 3)stuck closed contactor

One chlorine atome in the stratospher can destroy up to how many ozone molecules?

100,000 ozone molecules

Cfc's will no longer be manuf. after what year?

1995

Alternatives to CFC-12 some blends are ternary. How many parts does a ternary blend have?

3

Type 1 cert. defines small appliances as products that are fully manufac.,charged,and hermetically sealed in a factory with ___ pounds or less of ref.?

5 pounds

Type 1 tech can service a package unit a/c with a charge not to exceed _____ pounds?

5 pounds

checking cylinder of HFC-134a for non-condesable gases at 70 degree F - pressure should not exceed what?

76 psi

The Montreal Protocol calls for?

A producation phase out of CFC's

How does a System-dependant recovery device work?

Captures refrigerant with the assistance of components in the appliance

When a free oxygen and a chlorine atom unite they form?

Chlorine monoxide

What breaks an ozone molecule down?

Chlorine.

refillable cylinders used for transporting RECOVERED pressurized refrigerant must be..?

DOT approved

Freeze 12?

Drop in replace r-12

What program evaluates the substitutes?

EPA's Snap program

If retrofitting a MVAC system, the replacment refrigerant MUST be _ approved?

EPA-SNAP approved

What should you do in the even of a large release of refrigerant in a confined area?

IMMEDIATELY VACATE & VENTILATE the area

How does Chlorine break down ozone?

It steals one of the oxygen atoms, creating Chlorine Monoxide (CIO) and Oxygen (O2). The Chlorine Monxoide molecule then attacks another ozone molecule. Creating a chain reation that leaves only the single Chlorine atom.

What does MVAC stand for?

Motor Vehicle Air Conditioning System

Under what conditions may you use a DISPOSABLE cylinder to recover refrigerant?

NEVER

Should you run the compressor in a system when pulling a vaccum?

NO, never

What gase can be used in an alternate method of leak testing?

Nitrogen (an inert gas)

Ozone Depletion Potental (ODP) is described as what?

Ozone Depletion Potental (ODP) is described as what?

what readings are read on a compound pressure gauge?

PSIG (low)and inches of mercury (high)

What refrigerant is in 93 and older vehicles?

R 12

What refrig. is in 93 and newer cars?

R 134a

What refrigerant is in a home ac system?

R 22

what are the 3 cfc refrigerants?

R-11,12,500

Which freon is a CFC?

R-12

Which freon is a HFC?

R-134A

Which freon is a HCFC?

R-22

what are the 2 hcfc refrigerant?

R-22,123

to clean refrigerant for retuse by separating the oil and removing moisture by passing it through one or more filter driers.

Recycle

Define A.C.?

Remove moisture (humidity) from the air

What are the 2 types of recovery equipment systems?

System-dependant & Self-contained

How much damage can the Chlorine atom do to ozone molecules?

The Chlorine atom can destroy as many as 100,000 ozone molecules.

Ozone is made of what type and number of atoms?

Three oxygen atoms (o3)

To process refrigerant to a level EQUAL to NEW product specification as determined by chemical analysis?

To RECLAIM

In order to service small appliances, a tech. must be cert. as what?

Type 1 or universal

In Passive Recovery how can you assist ref. to move fast?

add heat to the ref.

Most ternary blends use which lubricant?

alkylbenzene lubricant

REFILLABLE cylinders used to transport recovered refigerants MUST...? a.be DOT approved b.be properly labeled and tagged c.be hydrostatically tested every 5 years d.all of the above

all of the above

To ensure that recovery cylinders are not filled above 80% of their capacity and the safe filling capacity...this can be controlled by? a.mechanical float devices b.electrong shut-offs c.weight (scales) d.all of above

all of the above

HYGROSCOPIC refrigerant oil...?

as a high affinity for water

If a blend contains HCFC-22 all hoses must be replaced with what type of hoses?

barrier type hoses

Recycled Refrigerant May?

be returned to a MVAC.

Name 2 pressure reducing devices:

captube exspansion valve

What does CFC stand for?

chlorine - flourine - carbon

Define RECYCLE...?

clean refigeratant for reuse by oil separation and passes through moisture absorption device.

in a res. ac system HIGH press GAS is found b/t what?

compress & condensor

In a res. ac system HIGH press LIQUID is found b/t what?

condensor & evap or Acoil

What are the penalties for a for not following Section 609 of the clean air act?

cost company as much as $27,500/day/violation -bounty up to $10,000 to lure competitors, customers, and workers to turn you in

What causes blended refrigerants to leak from a system in uneven amounts?

different vapor pressures.

Why must charging in the liquid phase be required with blends?

due to varying vapor pressures

Before transferring recycled refrigerant into an empty storage cylinder, the cylinder should first be...?

evacuated to at least 27" hg

In a res. ac system LOW press GAS is found b/t what?

evaporator (Acoil) & condensor

What are the penalties for a service technician who violates provisions of the clean air act?

fined 27,500 -lose certification -may be required to appear in Federal court

How does a self-contained recover system work?

has its own means of drawing refrigerant out of appliance

type 2 cert. applies to?

high and very high press. ref.

Leak repair is not mandated by the EPA at this time but...?

leaks should be repaired whenever possible

The proper method of charging a blended refrigerant is?

liquid phase

all recovery machines must?

meet stand. set by epa

Hygroscopic oil has an affinity for...?

moisture absorption. Therefore the use of XH-7 or XH-9 deciccant (drier) is necessary

To remove non-condesable gases A recovery cylinder must be emptied to what prior to transferring recycled refrigerant into an empty storage cyclinder?

must be evacuated to at least 27in. HG of vacuum.

After charging a system using manifold gauages, refrigerant in the hoses?

must be recovered

Is there a drop in for r-12?

no, there is not a drop in for r-12

Prior to recharging a system with recycled refrigerant, the refrigerant should be checked for...?

non-condensables

when filling a dial-a-charge the ref. from the top must?

not be vented and must be recovered

Leak Testing..what will a visual inspection find on the car if there is a leak?

oil on the high side of system

A passive recovery does not require a ?

operational compressor

Define RECLAIM...?

process refrigerant to a level equal to new product specs as determined by chemical analysis

What must a recover device made after nov. 15 1993 be capable of if compressor in system isn't working?

recover 80% of refrigerant or reach a 4 inch vac.

What must a recover device made after nov. 15 1993 be capable of if compressor in system is working?

recover 90% of ref. or reach a 4 inch vac.

If the compressor is NOT running in a passive recov. you are required to?

recover from both low and high side

RECOVERY Cylinders are designed to be?

refilled

What is the job of the drier in a ac system?

remove non-conensables (air,moisture)

Define RECOVER...?

remove refrigerant in any condition from a system and store in it an external container

If additional recovery is required after the initial recovery procedure,?

repeat the recovery process untile the A/C system vacuum remains stable for 2 min.

All refrigerant recovery cylinders should be inspected for...?

rust

What must be located within 12" (30 cm) of the end of a service hose?

shut-off valves

To see procedures for each state Check with the DOT and EPA for...?

special shipping procedures to be followed in each state based on the CLASSIFICATION of used refrigerant.

another name for low side of ac system?

suction side

Diminimos release?

the last 12" of freon left over in lines from shut off valve.

What should you always review when working with solvents, chemicals or refrigerants?

the material safety date sheets

Which document calls for production controls on cfc and hcfc?

the montreal protocal

Greatest effect of CFC is where?

the stratosphere, conatining the ozone layer

What does the SNAP program evaluate the substitutes for?

their effect of human health and the environment.

What is recover?

to remove refigerant in any condition from a system and store it in an approved external container. May not be returned to a motor vehicle air conditioning system without first being recyceled or reclaimed

What does Stratospheric Ozone protect us from?

ultraviolet radiation

After initial recovery procedures, the technician should...?

wait 5 minutes to determine if the system returns to a positive pressure