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25 Cards in this Set
- Front
- Back
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Small amounts of refrigerant 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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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 using nitrogen, the nitrogen tank should always be equipped with a |
Regulator |
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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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A recovery cylinder which is half full of recovered R-500 at normal room temperature about 75 degrees Fahrenheit, in the absence of non-condensables, will be pressurized to |
95 psig |
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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 are persons working on |
Small appliances |
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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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When R-500 is recovered from an appliance, it |
Must be recovered into its own recovery vessel (or a recovery cylinder that already contains some R-500) |
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The sale of refrigerants is |
Restricted to technicians who are EPA certified in refirgerant recovery |
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Solderless piercing valves should not remain installed on refrigeration systems after completion of repairs because |
They tend to leak over time |
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After installing and opening a piercing access valve, if the 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? |
Both a & b |
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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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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 recovery cylinder which is half full of recovered R12 at normal room temperature about 75 degrees Fahrenheit, in the absence of non-condensables, will be pressurized to |
75 psig |
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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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A passive system dependent recovery device for small appliances |
Captures refrigerant into a non-pressurized container |
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Which refrigerants can be mixed? |
Refrigerants can never be mixed |
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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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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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In the event of a large release of R12 or R22 in a contained area, which of the following is true? |
Self contained breathing apparatus (SCBA) or leaving the areas required |
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Piercing type valve should only be used on which of the following tubing materials? |
Both a & b ( copper & aluminum) |
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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 degrees Fahrenheit. This definition includes but is not limited to appliances using which of the following refrigerants listed below |
All of the above |
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When you connect your service manifold to check systems 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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According to the EPA, which recovery equipment maintenance practices should be performed on a regular basis? |
Check recovery device for refrigerant leaks |
