Type 1 prep

Question 1

What certification must persons handling refrigerant during maintenance, service, or repair of small appliances have?

Answer 1

Type 1 or universal certificiation.

Question 2

What is the EPA definition of a small appliance?

Answer 2

Products manufactured, fully charged, and hermetically sealed in a factory containing five pounds or less of refrigerant.

Question 3

What kind of systems may not be serviced by Type 1 technicians?

Answer 3

Split systems.

Question 4

What can technicians who are EPA certified in refrigerant recovery NOT do?

Answer 4

Sell CFC, HCFC, HFC, and HFO refrigerants to service or install refrigeration and air-conditioning equipment.

Question 5

What does not meet the criteria for type 1 appliance certification no matter the type or quantity of refrigerant?

Answer 5

MVAC-like systems.

Question 6

What cannot be used for new type 1 appliances?

Answer 6

HCFCs and HFCs such as R-404A.

Question 7

When do you use only EPA-approved substitutes?

Answer 7

When retrofitting or converting a system to use a different refrigerant.

Question 8

Do “drop-in” substitutes exist?

Answer 8

There are no such thing as “drop-in” substitutes.

Question 9

Does the EPA approve any substitute refrigerants as a direct “drop-in” replacement?

Answer 9

The EPA does not approve any substitute refrigerants as a direct “drop-in” replacement.

Question 10

What must be certified by an EPA-approved laboratory?

Answer 10

Recovery equipment used during the maintenance, service, or repair of small appliances that use CFCs, HCFCs, and HFCs.

Question 11

When can either self-contained (active) or passive recovery equipment be used?

Answer 11

When performing maintenance, service, or repair of Type 1 appliances containing a CFC, HCFC, or HFC.

Question 12

Provide an example of an appliance on which it would be permissible to use a passive recovery device.

Answer 12

A domestic refrigerator.

Question 13

What is the limit for passive recovery use for an appliance containing HCFCs or HFCs?

Answer 13

Maximum charge of 15 pounds.

Question 14

What are good maintenance practices for recovery equipment?

Answer 14

Checking for refrigerant leaks and oil leaks on a regular basis.

Question 15

What is an acceptable method for monitoring that the fill level in a recovery tank does not exceed 80%?

Answer 15

A refrigerant scale or tank internal float device.

Question 16

What must be able to recover 90% of the refrigerant when compressor is operating?

Answer 16

Self-contained recovery devices, for use with small appliances containing CFCs, HCFCs, HFCs, and HFOs.

Question 17

What else can a self-contained recovery device for small appliances be able to achieve?

Answer 17

A 4-inch vacuum under the conditions of AHRI 740.

Question 18

When a compressor is inoperable what must the recovery equipment for the purpose of disposal of refrigerants from small appliances be able to recover?

Answer 18

80% of the refrigerant or achieve a 4-inch vacuum.

Question 19

How can refrigerant recovery devices used to recover CFCs, HCFCs, HFCs, HFOs be closed?

Answer 19

Either manually or automatically closed when disconnected to prevent loss of refrigerant from hoses.

Question 20

When should hoses with manual or self-sealing valves on the ends be used to minimize the release of refrigerant?

Answer 20

When attaching a gauge set to check system pressures.

Question 21

When must the refrigerant that is vented off the top be recovered?

Answer 21

When filling a charging cylinder with a regulated refrigerant.

Question 22

When can a vacuum pump used for system dehydration be used as a recovery device?

Answer 22

It may be used to evacuate a recover cylinder.

Question 23

When can a vacuum pump used for system dehydration not be used as a recovery device?

Answer 23

It cannot be used in combination with a pressurized recovery cylinder or vessel for recovery.

Question 24

What is Hydrocarbon (HC) R-600a an approved refrigerant for?

Answer 24

New household refrigerators, freezers, and combination refrigeration/freezers.

Question 25

What are Hydrocarbon refrigerants not approved for?

Answer 25

Retrofit into existing household refrigerators designed for refrigerants other than hydrocarbons.

Question 26

What has approved R-290, R-450A, and R-600a refrigerants for newly manufactured household refrigerators?

Answer 26

New SNAP regulations.

Question 27

When is it NOT mandatory to repair a leak, but recommended to do so whenever possible?

Answer 27

When servicing a small appliance.

Question 28

Do you need to prevent the mixing of refrigerants during recovery?

Answer 28

Yes, always.

Question 29

Is it acceptable to mix refrigerants in an appliance or recovery cylinder?

Answer 29

No, Never.

Question 30

What refrigerant generally does not need to be recovered?

Answer 30

R-744, carbon dioxide CO2, a very high pressure refrigerant.

Question 31

Why should you clearly mark recovery vessels?

Answer 31

To ensure that mixing of refrigerants does not occur.

Question 32

When only are comparisons to a pressure-temperature chart valid to check for contaminated refrigerant?

Answer 32

If both the pressure and temperature of the refrigerant are stable and known.

Question 33

When must a technician allow temperature of the cylinder to stabilize to room temperature before taking a pressure reading for comparison using a PT chart?

Answer 33

When checking for non-condesnables inside a recovery cylinder containing one refrigerant.

Question 34

What if you suspect a refrigerant is contaminated in a recovery cylinder?

Answer 34

A pressure measurement should be taken and compared to a pressure-temperature chart.

Question 35

What if the pressure-temperature relationship between a recovered refrigerant inside a cylinder and the PT chart does not match?

Answer 35

The recovered refrigerant should be turned into a reclamation facility.

Question 36

Why may some reclamation facilities refuse or charge extra to process or destroy recovered refrigerant?

Answer 36

It may be harder to accept mixed refrigerants.

Question 37

What is typically used on small appliances that is entered using a piercing access valve to add or remove refrigerant?

Answer 37

A straight piece of tubing called a service aperture or process stub.

Question 38

What should be done after installing any type of access fitting onto a sealed system but before recovery?

Answer 38

The fitting should leak tested.

Question 39

What kind of valves should be removed from the system after repairs are completed?

Answer 39

Solderless type piercing valves because they tend to leak overtime.

Question 40

What can capture refrigerant in a non-pressurized container?

Answer 40

A passive, system dependent, recovery process for small appliances.

Question 41

When is it essential to take measures to help trapped, regulated refrigerant from the compressor oil during recovery?

Answer 41

When using passive recovery devices on small appliances with non-operating compressors.

Question 42

What is helpful when recovering refrigerants into a non-pressurized container from a small appliance with a non-operative compressor?

Answer 42

It is helpful to heat (with a heat gun) and strike the compressor with a rubber mallet.

Question 43

Where in the system may refrigerant get trapped?

Answer 43

It may be trapped under the oil in the compressor crankcase.

Question 44

When must the high and low side of the system be accessed for refrigerant recovery?

Answer 44

When using the system-dependent (passive) recovery process and the compressor does not run.

Question 45

Why should both high and low side access valves be installed during passive recovery on a small appliance (refrigerator)?

Answer 45

To improve the speed of recovery.

Question 46

How do you, after passive recovery, ensure that all CFC, HCFC, and HFC refrigerant has been removed from a frost-free refrigerator?

Answer 46

Energize the defrost heater to increase the refrigerant's temperature and vaporize any liquid.

Question 47

What requires only one access valve on the high side of the system during passive recovery?

Answer 47

An appliance with an operating compressor and a completely restricted capillary tube or metering device.

Question 48

What if a pungent oder is detected from the refrigerant during a system recovery and or repair?

Answer 48

It normally indicates a compressor burn-out.

Question 49

Why can a very large refrigerant leak cause suffocation?

Answer 49

Refrigerants are heavier than air and can displace oxygen.

Question 50

What can CFC and HCFC refrigerants decompose into at high temperatures?

Answer 50

Phosgene gas, hydrochloric acid, and/or hydrofluoric acid.