How does cooling occur in direct expansion vapor compression refrigeration systems? Options: When the refrigerant vapor turns into a liquid., When the refrigerant is under maximum pressure., When the liquid refrigerant is vaporized., When the refrigerant gives off heat.

When the liquid refrigerant is vaporized.

What does ozone depletion potential (or ODP) measure?

The ability of a substance to destroy ozone in the stratosphere.

Which of the following is an approved 'drop-in' service replacement for R-22? HFC-134a, R-407C, R-407A, There are no direct 'drop-in' refrigerant substitutes.

There are no direct 'drop-in' refrigerant substitutes.

What should a technician do if they lose their section 608 certification card?

Request a replacement from the certifying organization.

Which types of refrigerant can only be sold to persons who have successfully passed the EPA's section 608 certification exam?

All refrigerants that are not exempt from the venting prohibition

HCFC refrigerants contain which of the following? Helium, Carbon, Fluorine, & Chlorine, Hydrogen, Chlorine, Ferrite, & Carbon, Hydrogen, Chlorine, Fluorine, &Carbon, Hydrogen, Chlorine, Fluorine, & Calcium

Hydrogen, Chlorine, Fluorine, &Carbon

What characteristics of HFC refrigerants make them damaging to the environment? Options: They are toxic to plants and animals at low doses., They contain chlorine which damages the ozone layer., They have high Ozone Depletion Potential (ODP), They can have very high global warming potentials.

They can have very high global warming potentials.

Which factors affect the speed of system dehydration? Options: The ambient temperature and entropy of the refrigerant., The ambient temperature and amount of moisture in the system., The latent heat content of the refrigerant., The system super heat.

The ambient temperature and amount of moisture in the system.

What happens if EPA regulations change after a technician becomes certified?

It will be the technician's responsibility to comply with any future changes in the law.

What is the Montreal Protocol?

An international treaty that addresses ozone-depleting substances and their alternatives.

What must be done to the refrigerant that is vented off the top when filling a charging cylinder?

The refrigerant must be recovered if it is a CFC, HCFC, or HFC.

When recovering CFC, HCFC, or HFC refrigerant into a non-pressurized container from a household refrigerator with an inoperative compressor it is;

helpful to heat and strike the compressor with a rubber mallet.

Before beginning a refrigerant recovery procedure, it is ALWAYS necessary to;

know the type of refrigerant that is in the system.

Which of the following is required when attaching a gauge set to check system pressures? Options: Release a small amount of refrigerant to check for contamination., Have manual or self-sealing valves on the ends of the gauge set hoses to minimize refrigerant releases., Recover refrigerant and recharge to specifications even if no repairs are needed., Use hoses that are 3 feet or longer.

Have manual or self-sealing valves on the ends of the gauge set hoses to minimize refrigerant releases.

Recovery devices for use with small appliances containing CFCs, HCFCs, and HFCs must meet which of the following requirements? Recovering 90% of the refrigerant when the compressor is operating or achieving a 4-inch vacuum under the conditions of AHRI 740., Recovering 80% of the refrigerant when the compressor is operating., Recovering 95% of the refrigerant when the compressor is operating or achieving a 10-inch vacuum under the conditions of AHRI 740., Recovering 75% of the refrigerant when the compressor is operating.

Recovering 90% of the refrigerant when the compressor is operating or achieving a 4-inch vacuum under the conditions of AHRI 740.

Why should a recovery cylinder be allowed to stabilize to room temperature when checking for non-condensable inside a recovery cylinder known to contain only one refrigerant?

Comparisons to a pressure/temperature chart are only valid if both the pressure and temperature of the refrigerant are stable and known.

What type of appliances are technicians certified to service after passing the type 1 examination? Options: Appliances containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at the factory., Split systems containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at the factory., Appliances containing 5 pounds or less of refrigerant that have an open drive compressor and have been charged at the factory., Motor vehicle air conditioning equipment.

Appliances containing 5 pounds or less of refrigerant that have been hermetically sealed and charged at the factory.

When servicing a small appliance found to be leaking it is;

not mandatory to repair the leak but it is recommended to do so whenever possible.

When using a self-contained recovery device on a CFC, HCFC, or HFC system with an operating compressor, technicians must;

either recover the refrigerant to 4 inches of mercury vacuum or 90% of the nameplate charge.

A very large refrigerant leak can cause suffocation because refrigerants;

are heavier than air and displace oxygen.

Which hydrocarbon refrigerant is approved for retrofit into existing household refrigerators? Options: HC R-600a 2 ounces or less, Blended HC R-441A, HC R-290 1 lb. or less, Hydrocarbons are not approved for retrofit applications

Hydrocarbons are not approved for retrofit applications

When installing any type of access fitting onto a sealed system, what should be done?

The fitting should be leak tested before proceeding with recovery.

Which of the following best describes low loss fittings on refrigerant recovery devices used to recover CFCs, HCFCs, and HFCs? Options: They can be either manually closed or automatically closed when disconnected to prevent loss of refrigerant from hoses., They are used to connect the recovery device to an appliance and leak only small amounts of refrigerant during use., They are used to connect the recovery device to an appliance and must be discarded after each use., They eliminate oil loss during recovery.

They can be either manually closed or automatically closed when disconnected to prevent loss of refrigerant from hoses.

When R-410A is recovered from an appliance, it;

should be recovered into a recovery vessel that is clearly marked to ensure that mixing of refrigerants does not occur.

How many access valves are needed to recover the refrigerant on a sealed system with an operating compressor that has a completely restricted capillary tube? Options: Two valves, one on the high and one on the low side of the system., Only one access valve, on the low side of the system., Only one access valve, on the high side of the system., Two valves, one at the inlet to the compressor and one at the outlet of the condenser coil.

Only one access valve, on the high side of the system.

Which of the following does NOT meet the criteria for Type 1 appliance certification? A MVAC-like system that holds three pounds of R-12., a water cooler that holds 13 ounces of R-22, a food freezer that holds 22 ounces of R-134a, A dehumidifier that holds seven ounces of R-410A

A MVAC-like system that holds three pounds of R-12.

Which condition requires accessing both the high and low side of the system for refrigerant recovery when using the system-dependent (passive) recovery process?

When the compressor does not run.

What of the following are included in EPA's definition of "small appliance?" Products fully manufactured, charged, and hermetically sealed in a factory., Products having 15 pounds or less of refrigerant., Products with compressors under ½ horsepower., Fully charged components ready for installation in a split system.

Products fully manufactured, charged, and hermetically sealed in a factory.

A passive system-dependent recovery process for small appliances;

captures refrigerant in a non-pressurized container.

Which of the following is a true statement regarding a refrigerant that can be used as a direct service 'drop-in' substitute for R-22? Options: R-134a used with a TEV, R-410A used with a TEV that has a MOP of 75psig., R-290 with a fixed orifice metering device., There is no such thing as a "drop-in" substitute.

There is no such thing as a "drop-in" substitute.

What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated?

Turn refrigerant in for reclamation.

Return From Winter Break Assessment Flashcard

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FLASHCARD QUESTION

Front

How should refrigerant blends be charged?

Back

As a liquid

FLASHCARD QUESTION

Front

HFC refrigerants contain which of the following? Chlorine, Fluorine, & Hydrogen; Hydrogen, Chlorine, & Carbon; Hydrogen, Fluorine, & Carbon

Back

Hydrogen, Fluorine, & Carbon

FLASHCARD QUESTION

Front

In the event of a large release of CFC, HCFC, or HFC refrigerant in a contained area which of the following is true? Safety googles and lined butyl gloves are sufficient., Self-contained breathing apparatus (SCBA) or leaving the area is required., Respiratory protection is not required., Dust masks are sufficient.

Back

Self-contained breathing apparatus (SCBA) or leaving the area is required.

FLASHCARD QUESTION

Front

Which of the following refrigerants contain chlorine? R-22, R-134a, R-410a, R-1234yf

Back

R-22

FLASHCARD QUESTION

Front

EPA does NOT require technicians (or the company employing the technician) to keep which of the following records when disposing of appliances with 5-50 pounds of refrigerant? Options: The model and serial number of the appliance., The type of refrigerant recovered., The quantity of refrigerant, by type, recovered from disposed appliances in each calendar month., The quantity of refrigerant by type, sent for reclamation or destruction.

Back

The model and serial number of the appliance.

FLASHCARD QUESTION

Front

Which refrigerant does not contain chlorine? Options: R-134a, R-12, R-22, R-124

Back

R-134a

FLASHCARD QUESTION

Front

What is the name of the EPA's program that identifies refrigerants with lower overall risks to human health and the environment?

Back

The Significant New Alternatives Policy (SNAP) Program.

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