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69 Cards in this Set
- Front
- Back
If the EPA regulations should change after a technician become certified |
it is the technician's responsibility to comply with any future changes in the law |
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at a high temperature open flames glowing metal surfaces R-12 and R-22 can do decompose to form: |
Phosgene gas |
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Which of the following refrigerants is most commonly used as a replacement for R-12 in new household refrigerators? |
R-134a |
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Recovery equipment used for the service or repair of small appliances must be certified by an EPA approved laboratory if the recovery equipment was manufactured after |
November 15th 1993 |
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What is the maximum allowable Factory charge of refrigerant for type 1 appliances? |
5 pounds |
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Why is it important to obtain an accurate pressure reading of refrigerant inside a recovery cylinder? |
The pressure reading along with the temperature reading can indicate if there is excessive air or other non condensables in the cylinder |
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recovery devices that were manufactured after November 15th 1993 and are used for Recovery of refrigerant for small appliances must be capable of |
recovering 90% of the refrigerant when the compressor is operating or achieving a 4 inch vacuum under the conditions of ARI 740- 1993 |
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solderless piercing valve should not remain installed on refrigerant systems after completion of repairs because |
They tend to leak over time |
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Whenever nitrogen is used to pressurize or blow debris out of the system |
Only nitrogen Vapor should be used |
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What can cause excessive pressure on the high side of an active self-contained recovery device? |
A closed recovery tank inlet valve or excessive air or other non condensables in the recovery tank (either A or B) |
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Portable refillable tanks or containers used to ship recovered refrigerants must meet what standard(s)? |
Department of Transportation |
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A recovery cylinder which is half full of recovered R-22 at normal room temperature (above 75F) in the absence of non condensables will be pressurized to |
130 PSIG |
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Before beginning a refrigerant recovery procedure it is ALWAYS necessary to |
Determine the type of refrigerant in the system |
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Which of the following refrigerants must be recovered with equipment currently regulated by the equipment certification requirements of the EPA under Section 608? |
R-12 |
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In the event of a large release of R-12 or R-22 in a contained area which of the following is true? |
Self contained breathing apparatus SCB or leaving the area is required |
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according to the EPA which recovery equipment maintenance practice should be performed on a regular basis? |
Check recovery device for refrigerant leaks |
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Small amounts of refrigerant have no odor therefore if a pungent odor is detected during a system recovery and/or repair |
A compressor burnout has likely occurred |
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When recovering refrigerant into a non-pressurized container from a refrigerator with an inoperative compressor |
it is necessary to heat and strike the compressor with a rubber mallet |
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Large spills of refrigerant can cause suffocation because: |
They are heavier than air and displace oxygen |
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which of the following is not a type 1 Appliance? |
An MVAC like system that holds three pounds of R-12 |
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when you connect your service manifold to check system pressures it's always a good idea to |
Use equipment such as hand valves or self sealing hoses to minimize any release |
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the EPA requires that all appliances must be equipped with a service aperture or other device that is used when adding or removing refrigerant from the appliance for small appliances this service port typically is |
straight piece of tubing called a process tube that is entered using a piercing access valve |
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Anyone who recovers refrigerant during the maintenance service or repair of small appliances must be certified as either a universal technician or a |
type 1 technician |
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Anyone who recovers refrigerant during the maintenance service or repair of small appliances must be certified as either a universal technician or a |
type 1 technician |
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EPA regulations repair of the capture of at least 80% of the refrigerant from a small appliance with a non operating compressor if the technician is using |
either type of recovery unit |
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when using a passive system dependent recovery method on an appliance with an operating compressor you should run the (appliances) compressor |
And recover the refrigerant from the high side |
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A passive system dependent recovery device for small appliances |
Captures refrigerant in a non-pressurized container |
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The sale of CFC and HCFC refrigerants is |
Restricted to technicians who are EPA certified in refrigerant recovery |
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Which of the following listed below should be recovered with current EPA approved recovery devices? |
None of the above |
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When servicing a small appliance with a leak |
It is not mandatory to repair the leak but do so whenever |
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when using any equipment or servicing any system that has a Schraeder valve it is "critical" to |
inspect the Schraeder valve core for Bends and breakage replace any damage Schraeder valve core to prevent leakage cap the Schraeder ports to prevent accidental depression of valve core( all of the above ) |
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If R-12 or R-22 are exposed to high temperatures (from open Flames or glowing-hot metal surfaces) these refrigerants can decompose to form |
Hydrochloric and hydrofluoric acids |
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when using a graduated charging cylinder any refrigerant that is vented from the charging cylinder |
Must be recovered |
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A standard vacuum pump designed specifically for evacuation and dehydration can |
Never be used as a recovery device in combination with a pressurized container |
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The EPA section 608 server certification must be renewed every |
the EPA certification has no expiration date |
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Prior to shipping any use refrigerant it is necessary to |
Properly label the refrigerant container properly complete shipping paperwork check that the refrigerant container meets DOT standards(all of the above) |
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A refrigerant that can be used as a direct Service drop in substitute for R-12 in a small appliance is |
None of the above |
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After installing and opening a piercing access valve is a system pressure is _______do not begin the recovery procedure |
0 PSIG |
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the EPA definition of a small appliance includes which of the following |
A device manufactured charged and hermetically sealed in a factory a device with a charge of 5 pounds or less(both a & b) |
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when using _____ it is essential to take extra measures such as heating or striking the compressor to help release trapped refrigerant from the compressor oil |
Passive system dependent recovery devices on a small appliances with a non-operating compressor |
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It is an EPA regulation that any person who opens an appliance for maintenance service or repair must have at least one self-contained recovery machine available at their place of business the only exception to this rule or persons working on |
Small appliances |
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Which of the following are part of the EPA recommended safe work practices? |
Wear safety glasses or goggles when working with any compressed gases wear butyl lined gloves when connecting disconnecting hoses(both a & c) |
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Recovery devices that were manufactured before November 15th 1993 and are used for Recovery of refrigerant from small appliances must be capable of |
Recovering 80% of the refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum under conditions of ARI 740 -1993 |
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Piercing type valve should only be used on which of the following tubing materials? |
Copper aluminum( both a & b) |
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When using a passive system dependent recovery process you should access both the high and low side of the system for the refrigerant recovery if |
The system's compressor does not run |
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On a small appliance with an operating compressor that has a completely plugged capillary tube what is the minimum number of access valves that are needed to evacuate the refrigerant? |
Only one access valve on the high side of the system |
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Technicians with a type 1 small appliance certification are certified to recover refrigerant during the maintenance service or repair of |
Packaged terminal air conditioners( PTACs) with five pounds or less of refrigerant |
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A recovery cylinder which is half full of recovered R-500 at normal room temperature(about 75F) in the absence of non condensables will be pressurized to |
95 PSIG |
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A very high pressure Appliance is one that uses a refrigerant with a liquid phase saturation pressure above 355 psia at 104°F this definition includes but is not limited to appliances using which of the following refrigerants listed below |
R-23 R-13 R-503 (all of the above) |
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A refrigerant that can be used as a direct Service drop in substitute for R-22 in a small appliance is |
None of the above |
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If a large leak of refrigerant occurs in an enclosed area and no self contained breathing apparatus is available then the technician should |
vacate and ventilate the spill area |
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When recovering refrigerant from a household refrigerator who's compressor does not run it is recommended that low and high Side Access valves be installed because |
It can enhance the speed of recovery it may be necessary to achieve required recovery efficiency(both a&b) |
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A recovery cylinder which is half full of recovered R-12 at normal room temperature in the absence of non condensables will be pressurized to |
75 PSIG |
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when using nitrogen the nitrogen tank should always be equipped with a |
Regulator |
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To avoid accidental removal of liquid refrigerant when recovering vapor from a system using a self-contained active recovery device that can not handle liquid refrigerant you should draw vapor from the |
High side |
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If you install an access fitting onto a sealed system |
The fitting should be leak tested before proceeding with recovery |
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If you are recovering refrigerant from a frost-free refrigerator you should |
Turn on the defrost heater to vaporize any trapped liquid |
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When checking for the existence of non condensable gases inside a recovery cylinder why is it proper procedure to allow the temperature of the cylinder to stabilize at room temperature before taking a pressure reading |
Because any comparisons to a pressure temperature chart is only valid if both the pressure and temperature of the refrigerant are stable |
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A standard vacuum pump designed specifically for evacuation and dehydration can |
Be only used as a recovery device in combination with a non-pressurized container |
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whenever nitrogen is used to pressurize or blow debris out of the system the nitrogen |
Can be vented |
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If a Reclamation processing plant is given a recovery tank containing a mixture of refrigerants they can |
Refuse to process the refrigerant and return it agreed to destroy the refrigerant but typically a substantial fee is charged for the destruction(both a&b) |
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Refrigerant recovery devices must be equipped with low loss fittings low loss fittings are used to |
Connect the recovery device to any Appliance and which are manually closed or which close automatically when they are disconnected to prevent loss of refrigerant from hoses |
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recovery or recycling equipment which was manufactured after November 15th 1993 and is used to recover refrigerant from small appliances prior to disposal of the small appliances must be used to |
Recover 80% of the refrigerant in an appliance if the appliances compressor is inoperative recover 90% of the refrigerant in an appliance if the appliances compressor is operational(both b&c) |
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The sale of refrigerants is |
Restricted to technicians who are EPA certified in refrigerant recovery |
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A recovery cylinder which is half full of recovered R-410A at 90 degrees F in the absence of non condensables will be pressurized to |
300 PSIG |
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Which refrigerants can be mixed? |
refrigerant can never be mixed |
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Which refrigerants can be mixed? |
refrigerant can never be mixed |
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When transporting refrigerants DOT regulation number 49 CFR requires _______ to be recorded on the shipping papers for hazard class 2.2 non flammable compressed gases? |
number of cylinders of each gas |
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When transporting refrigerants DOT regulation number 49 CFR requires _______ to be recorded on the shipping papers for hazard class 2.2 non flammable compressed gases? |
number of cylinders of each gas |