Epa - Type 1 - Retail Ready

Front 1

What is the EPA definition of a "small appliance"?

Back 1

A "small appliances" is defined as an appliance typically charged at the factory with five pounds or less of refrigerant. These appliances are defined as; refrigerators and freezers designed for home use, room air conditioners including window and packaged terminal air-conditioning units (PTAC), package heat pumps, dehumidifiers, under the counter icemakers, vending machines and drinking water coolers. All other appliances that use a CFC or HCFC refrigerant are defined as an "appliance."

Front 2

Does the EPA require the repair of leaks on small appliances?

Back 2

Repair of leaks on small appliances is not required, but leaks should be repaired whenever possible.

Front 3

What EPA certification type must technicians have to service any appliance that EPA calls a "small appliance"?

Back 3

Only Type I or Universal, certification.

Front 4

What service aperture may be used on small appliance?

Back 4

For a small appliance, this service port typically is a straight piece of tubing, access tube or process tube that is entered using a "piercing access valve."

Front 5

What is the name for a fitting, used to connect a recovery device to an appliance, which can close to prevent loss of refrigerant from hoses?

Back 5

Either a Low-loss fitting (self sealing) or shut-off valve (Hand valve) on each hose. These fittings can either be closed manually or automatically when disconnected.

Front 6

What is the primary purpose for using hand valves or self-sealing hoses when using a gauge set?

Back 6

Gauge set services hoses must be fitted with some type of Low-loss fitting (self sealing) or shut-off valve (Hand valve) to prevent the loss of refrigerant.

Front 7

Which refrigerants must be recovered under Section 608 of the EPA regulations?

Back 7

According to Section 608 of the Clean Air Act, after July 1, 1992, no person installing, maintaining, repairing, or disposing of any appliance may knowingly vent or otherwise release, into the environment, any class I chlorofluorocarbons (CFC's) or class II hydrochlorofluorocarbons (HCFC's) and their blends or substitutes, and therefor must be recovered according to the amendments and standards of the regulations/Act.

Front 8

Is there a "drop-in" refrigerant for CFC-12?

Back 8

To this date, there is NO "Drop-In" replacement for CFC- R12

Front 9

What is the replacement refrigerant for CFC-12 in household refrigerators?

Back 9

HFC-R134a is a replacement for CFC-12 in household refrigerators however, there is NO "Drop-In" replacement for CFC- R12

Front 10

What can be determined by taking an accurate temperature and pressure reading of a container holding a recovered refrigerant?

Back 10

Check for non-condensables , or type of refrigerant, by finding the corresponding pressure and temperature on a P/T chart. The pressure in the container should read within a few degrees or the pressure shown on the P/T Chart.

Front 11

When doing a non-condensables check a recovery cylinder should stabilize in temperature before any readings are taken. Why?

Back 11

To stabilize the container, a recommended procedure is to store the container at a temperature between 65 -100 degrees F for at least 12 hours to allow the refrigerant and non-condensables to separate for a more accurate measurement.

Front 12

What is the internal pressure of CFC-12 refrigerant stored at 75 deg. F?

Back 12

77 PSIG.

Front 13

What is the exception to the rule that says that someone servicing and appliance must have at least one self-contained recovery machine available at their place of business?

Back 13

Any person who opens an appliance for maintenance, service or repair must have at least one, certified, self-contained recovery machine available at their place of business, "unless this person is working on a small appliance."

Front 14

Ammonia hydrogen, and water can be found in the refrigerators in some campers and other recreational vehicles. Should these compounds be recovered with EPA approved recovery equipment?

Back 14

No.

Front 15

May the nitrogen used for purging or pressurizing a system be vented to the atmosphere?

Back 15

Yes, and this also allows for venting a trace (or de-minimis amount) of refrigerant mixed with a nitrogen pressurization charge.

Front 16

When may a technician recover only 80% of the refrigerant in a small appliance?

Back 16

In a system dependent recovery with a non-operating compressor

Front 17

May a technician use a passive recovery machine for recovery from a domestic refrigerator?

Back 17

Yes

Front 18

What requirements are placed on recovery machines built after November 15, 1993?

Back 18

Must be able to recover 80% of the refrigerant if the compressor is inoperative or 90% if the compressor is operative. Must be EPA certified.

Front 19

When using a recovery machine manufactured after November 15, 1993, what percentage of the refrigerant must be recovered in a household refrigerator with an operating compressor? What percentage if the compressor is NOT operating?

Back 19

80%, 90%.

Front 20

Is a certified technician responsible for future changes in EPA regulations?

Back 20

Yes

Front 21

What type of certification is required to purchase CFC and HCFC refrigerants?

Back 21

Type I

Front 22

What must be done with any regulated refrigerant vented from a graduated charging cylinder?

Back 22

It must be recovered.

Front 23

What first step must you always take before starting a recovery of refrigerant form any equipment?

Back 23

Check which refrigerant is being used.

Front 24

What is a "system-dependent" recovery machine?

Back 24

System dependent recovery machines rely on the compressor of the system being serviced, or the pressure of the refrigerant to pump the refrigerant into a recovery drum.

Front 25

Describe a system-dependent (passive) recovery process for small appliances.

Back 25

Evacuate or cool a cylinder. Connect the high and low hoses to the system. Pull refrigerant into the cylinder with vacuum or the low tank pressure.

Front 26

What two conditions require that you access both the high and low side of the system for refrigerant recovery?

Back 26

When there is an inoperative compressor on the system or when necessary to reach required recovery levels.

Front 27

What are the benefits of accessing the low and high side access valves when recovering refrigerant from a system with an inoperative compressor?

Back 27

It speeds up recovery, improves efficiency and may be necessary to reach required recovery levels.

Front 28

How should you access the system and should you run the compressor when using a system-dependent (passive) recovery on a refrigerator with an operable compressor?

Back 28

Access the high side and run the compressor.

Front 29

Which access valve (s) should you connect to when recovering from a system with an operating compressor and a completely restricted capillary tube?

Back 29

High side valve.

Front 30

When using a self-contained (active) recovery device, what two conditions can cause excessive pressure on the recovery machine's high side?

Back 30

A recovery container that is not properly evacuated or one that has unopened valve.

Front 31

Why should defrost heaters be turned on during a recovery from a small appliance?

Back 31

To speed up refrigerant release from the oil.

Front 32

When should entrapped refrigerant from oil be recovered?

Back 32

Any time oil is removed from a large system and on small appliances when using system dependent recovery with a non-operating compressor.

Front 33

What does striking the appliance compressor do during a recovery?

Back 33

Helps to free refrigerant that may be trapped in the oil.

Front 34

A recovery machine should be checked daily for what?

Back 34

Refrigerant leaks.

Front 35

Can a standard vacuum pump be used as a recovery machine?

Back 35

In theory yes, but unlikely. First it would have to be certifiable, second it would have to be connected to a non-pressurized recovery container.

Front 36

Should technicians ever mix refrigerants in the field?

Back 36

No

Front 37

How should you recover refrigerant that is different from the refrigerant you usually recover?

Back 37

Different refrigerants must be placed in recovery vessels containing the same type of refrigerant.

Front 38

What can a reclaimer do with any mixed refrigerant you ship to them?

Back 38

They may either refuse to process and return it at owner's expense or agree to destroy the refrigerant for a substantial fee.

Front 39

To ship recovered refrigerant you must label the container and complete all necessary paperwork. What else should you do?

Back 39

Use DOT approved cylinders.

Front 40

What federal agency sets the standards for portable refillable tanks or containers used to ship CFC or HCFC refrigerants?

Back 40

Department of Transportation (DOT).

Front 41

Safety glasses and butyl-lined gloves should be worn for what procedures?

Back 41

When you are connecting and disconnecting hoses.

Front 42

Piercing valves are used for what purpose?

Back 42

To allow access to the sealed system for recovery.

Front 43

On what materials are piercing valves used?

Back 43

Copper or aluminum refrigerant lines.

Front 44

What should be done to a piercing type Schrader valve after it is installed on a charged system?

Back 44

It should be capped after any service procedure.

Front 45

Why should solder-less type piercing valves be removed after completion of repairs?

Back 45

To prevent leaks.

Front 46

What are the critical maintenance checks done to a Schrader valve?

Back 46

Periodically checked for leaks and replaced if damaged.

Front 47

What does a pungent odor detected after opening a system mean?

Back 47

It might mean acids are present due to a compressor burnout.

Front 48

What do you do if the oil is contaminated?

Back 48

Tubing flushing might be required.

Front 49

What system pressure would indicate a recovery should not be performed?

Back 49

0 PSIG.

Front 50

What are the current methods used to monitor the 80% fill level in a recovery tank?

Back 50

Floats, thermistor-type sensors and weighing scales.

Front 51

Why do large refrigerant leaks cause suffocation?

Back 51

Refrigerants will replace air in a confined space leading to possible oxygen starvation.

Front 52

Before entering an area of a large leak of refrigerant what apparatus must be worn?

Back 52

Self-contained breathing apparatus.

Front 53

What should be done if a large leak occurs and no breathing apparatus is available?

Back 53

Ventilate the space and leave the area.

Front 54

Which acids are formed when refrigerant touches sources of high heat?

Back 54

Hydrochloric and hydrofluoric acids and phosgene gas.

Front 55

What safety component must be used whenever dry nitrogen is used to pressurize a system?

Back 55

Nitrogen tanks should be equipped with a regulator.

Front 56

What information does DOT require when shipping refrigerant cylinders?

Back 56

Shipping papers must indicate the refrigerant type and number of cylinders.

Front 57

Which government agency sets the standards for refillable refrigerant cylinders used to transport CFC and HCFC refrigerants?

Back 57

Department of Transportation (DOT).