Question 1

What is the EPA definition of a 'Small Appliance'?

Accepted Answer

A small appliance is defined as products that are fully manufactured, charged, and hermetically sealed in a factory with 5 pounds or less of refrigerant.

Question 2

For small appliances, the recovery equipment manufactured after November 15, 1993, must be capable of recovering:

Accepted Answer

Certified equipment must recover 90% of refrigerant if the compressor is working, 80% if it is not working, or achieve a 4-inch Hg vacuum.

Question 3

When servicing a small appliance found to be leaking, it is:

Accepted Answer

EPA regulations do not require leak repair for small appliances, but it is best practice to repair them to conserve refrigerant.

Question 4

Which of the following is NOT a method for opening a system for recovery?

Accepted Answer

Venting refrigerant is illegal. Access must be gained via valves (piercing, process stubs) to recover the refrigerant.

Question 5

Before disposing of a small appliance containing R-12, it is necessary to:

Accepted Answer

All CFC, HCFC, and HFC refrigerants must be recovered before the final disposal of the appliance.

Question 6

System-dependent recovery equipment CANNOT be used when:

Accepted Answer

System-dependent (passive) recovery equipment is limited to appliances containing 15 pounds of refrigerant or less.

Question 7

When using a self-contained recovery device on a system with a non-operating compressor, it is helpful to:

Accepted Answer

Cooling the recovery tank lowers its pressure, which helps pull refrigerant from the system into the tank, speeding up the process.

Question 8

What should be done to a piercing type access valve after the service procedure is completed?

Accepted Answer

Piercing valves (saddle valves) use a rubber gasket that tends to fail and leak over time. They should not be left as permanent service ports.

Question 9

Small appliances used in campers or recreational vehicles may use refrigerants such as Ammonia, Hydrogen, or Water. These refrigerants:

Accepted Answer

Ammonia, Hydrogen, and Water are not ozone-depleting substances covered by the recovery mandate, and introducing them into standard recovery equipment can damage it.

Question 10

If a large leak of refrigerant occurs such as from a broken line, and no self-contained breathing apparatus is available, you should:

Accepted Answer

Safety first. Large leaks displace oxygen. You must leave the area immediately and ventilate it to prevent asphyxiation.

Question 11

When recovering refrigerant into a non-pressurized container from a refrigerator with an inoperative compressor, it is helpful to:

Accepted Answer

Heating and tapping the compressor helps release refrigerant trapped in the oil, aiding recovery when the system compressor cannot run.

Question 12

When installing an access fitting, why is it important to check for leaks?

Accepted Answer

Access fittings (like piercing valves) must be leak-tested to ensure that the recovery process itself doesn't cause venting.

Question 13

Technicians with a Type I certification may service:

Accepted Answer

Type I certification specifically covers small appliances with 5 lbs or less of refrigerant that are factory charged and sealed.

Question 14

Which refrigerant is most commonly used in new household refrigerators today?

Accepted Answer

Modern household refrigerators typically use R-600a (Isobutane), a hydrocarbon with very low GWP.

Question 15

A standard vacuum pump can only be used as a recovery device for:

Accepted Answer

A vacuum pump is not a recovery machine, but in passive (system-dependent) recovery, it can be used to evacuate a non-pressurized container (like a bag) to draw refrigerant out.

Question 16

When filling a charging cylinder with a regulated refrigerant, the refrigerant that is vented off the top of the cylinder:

Accepted Answer

The venting of refrigerant from the top of a charging cylinder (to fill it) is NOT exempt and must be recovered.

Question 17

If a technician is just adding refrigerant to a small appliance, do they need to have recovery equipment available?

Accepted Answer

Technicians must always have certified recovery equipment available when servicing appliances that contain regulated refrigerants, even if just charging.

Question 18

At high temperatures (e.g., open flames), R-12 and R-22 can decompose to form:

Accepted Answer

Chlorinated refrigerants decompose in flames to form dangerous acids and phosgene gas, which is highly toxic.

Question 19

Which of the following best describes 'System-Dependent' recovery equipment?

Accepted Answer

System-dependent (passive) equipment relies on the pressure of the appliance or its compressor to move the refrigerant.

Question 20

When recovering refrigerant from a household refrigerator with an operating compressor, you must recover the refrigerant from:

Accepted Answer

When the compressor is running, it pumps refrigerant to the high side. Recovering from the high side is efficient. However, standard passive recovery often requires access to the high side to let the compressor push liquid out.

Question 21

If a reclamation facility receives a tank of mixed refrigerant, they may:

Accepted Answer

Mixed refrigerants are difficult or impossible to separate. Reclaimers often destroy them and charge the technician a high fee.

Question 22

A passive recovery device can be used for a small appliance with a non-operating compressor if:

Accepted Answer

With a dead compressor, you must access both the high and low sides to ensure all refrigerant is captured, as the compressor valves may block flow.

Question 23

Which condition requires obtaining a Type II certification instead of Type I?

Accepted Answer

Type I is strictly for 5 lbs or less. A system with 6 lbs requires Type II certification (unless it's MVAC).

Question 24

When checking for non-condensables in a recovery cylinder, the technician should:

Accepted Answer

By checking the tank pressure against the P-T chart for the known refrigerant at a stable ambient temperature, you can determine if air (non-condensables) is present (pressure will be higher than chart).

Question 25

What is the maximum allowable factory charge for Type I appliances?

Accepted Answer

The definition of a small appliance limits the factory charge to 5 pounds or less.

Question 26

Permanent safety markings are NOT required on which of the following areas on household refrigerators using hydrocarbon refrigerants?

Accepted Answer

Safety markings (e.g., 'Danger - Flammable Refrigerant') are required on process tubes, near exposed tubing, and on the machine compartment, but not typically on consumer touchpoints like handles.

Question 27

When recovering refrigerant using a passive system-dependent method, which vessel is typically used to capture the refrigerant?

Accepted Answer

Passive recovery often uses a specialized non-pressurized bag that expands as refrigerant enters it, often aided by a vacuum pump sucking on the bag's exterior.

Question 28

What pressure must be achieved when recovering from a small appliance with a working compressor using equipment made after Nov 15, 1993?

Accepted Answer

If the compressor works, you must recover 90% of the charge OR achieve a 4-inch Hg vacuum. Both are acceptable standards.

Question 29

If you suspect a leak in a small appliance, you should:

Accepted Answer

Using a leak detector (electronic or bubbles) is the proper procedure to identify the source of the leak before attempting repair.

Question 30

Why should you allow a few minutes for the system pressure to stabilize after shutting off the recovery unit?

Accepted Answer

If pressure rises after shutoff, it indicates that there is still refrigerant boiling off in the system (incomplete recovery) or a leak in the service valve.

Question 31

Which agency approves recovery equipment used on small appliances?

Accepted Answer

The EPA does not test equipment directly; they require equipment to be tested and certified by an EPA-approved third-party laboratory.

Question 32

When soldering or brazing, why must the system be purged with nitrogen?

Accepted Answer

Nitrogen displaces oxygen, preventing the formation of copper oxide scale inside the tube during high-heat brazing.

Question 33

Can a person who is not certified under Section 608 purchase R-134a containers larger than 2 pounds?

Accepted Answer

The sale of refrigerants (except for small cans of MVAC refrigerant <2 lbs) is restricted to certified technicians.

Question 34

Which of the following requires a process stub on the appliance?

Accepted Answer

To recover refrigerant from a hermetically sealed small appliance without service valves, a process stub (or piercing valve) is needed for access.

Question 35

For a system with a non-operating compressor, how much refrigerant must be recovered using equipment made before Nov 15, 1993?

Accepted Answer

Pre-1993 equipment standards require 80% recovery or 4 inches Hg vacuum, regardless of compressor status (though 80% is the specific metric for non-op).

Question 36

If a reclamation facility receives a cylinder with mixed refrigerants, who is responsible for the disposal fee?

Accepted Answer

The technician or company sending the mixed refrigerant typically bears the cost of destruction.

Question 37

When recovering R-410A, what specific equipment rating is required?

Accepted Answer

R-410A operates at very high pressures. Equipment must be specifically certified for use with high-pressure refrigerants to ensure safety.

Question 38

Which of the following is NOT a small appliance?

Accepted Answer

A split-system with 6 lbs of charge exceeds the 5 lb limit and is not factory sealed (it requires field piping). It falls under Type II.

Question 39

Using a straight access valve (Schrader valve) usually requires:

Accepted Answer

To open the Schrader valve and allow flow, the connecting hose must have a valve core depressor.

Question 40

What is the primary reason for not using the same gauge set for R-22 and R-410A?

Accepted Answer

R-410A uses POE oil, while R-22 uses mineral oil. Mixing them can cause sludge. Also, R-410A pressures are much higher, requiring gauges rated for that pressure.

Question 41

If a technician purchases a new recovery machine today, it must:

Accepted Answer

All recovery equipment sold today must be certified by an approved lab to meet current EPA standards.

Question 42

When recovering refrigerant, it is important to verify the tank is not overfilled by monitoring:

Accepted Answer

Weight is the only accurate method to determine fill level. Tanks must not exceed 80% capacity by weight.

Question 43

Which of the following is true regarding 'drop-in' hydrocarbon refrigerants for small appliances?

Accepted Answer

Hydrocarbons (like R-600a/R-290) are flammable. EPA SNAP regulations generally prohibit retrofitting existing systems designed for non-flammable refrigerants with hydrocarbons.

Question 44

After recovering refrigerant, if nitrogen is used to flush the system, the nitrogen:

Accepted Answer

Nitrogen is not an ozone-depleting substance or a greenhouse gas regulated under Section 608, so it can be vented.

Question 45

Which practice aids in moving refrigerant to the recovery cylinder?

Accepted Answer

Cooling the cylinder lowers the vapor pressure inside, creating a pressure differential that helps draw refrigerant from the appliance into the tank.

Type I (Small Appliances) Practice Questions

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