Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
The recovery process on an R-12 or R-134a A/C system should continue until a stable vacuum is held by the system for |
2 minutes |
Wait at least 5 minutes to determine if all refrigerant has been removed. If the system returns to a positive pressure. Repeat the recovery operation until vehicle A/C system vacuum remains stable for 2 MINUTES. |
|
|
A recycled refrigerant container has been checked and found to be above the given pressure limit for the ambient temperature. Technician A says that the refrigerant container should be placed in a cooler storage area before use. Technician B says that the vapor in the container should be slowly vented into a refrigerant handling unit. Who's right? |
B only |
|
|
|
The ozone in the stratosphere could cause |
Increases eye disease Skin cancer Crop loss Deforestation Reduced marine life Increased ground level ozone |
|
|
|
The ozone layers filters out most of the sun's harmful |
Ultra violet radiation |
|
|
|
Technician A says that the sunlight striking CFC molecules can cause chlorine to be released. Technician B says that chlorine atoms react with ozone to produce chlorine monoxide. Who's right? |
Both A and B |
|
|
|
R-134a refrigerant must be reclaimed to meet which of these purity standards? |
AHRI or ARI |
|
|
|
If tree required charge level of refrigerant for MVAC system is 40 ounces, which of these is the correct charge level measured in pounds? |
2.50 lbs |
|
|
|
Technician A says that recovery/ recycling/ recharging equipment for R-1234yf refrigerant requires integration with refrigerant identifier. Technician B says that recovery/ recycling/ recharging equipment for R-1234yf refrigerant uses a 17mm o.d quick coupler on the low side service hose. Who's right? |
A only |
|
|
|
Which of these identified a cylinder of R-1234yf refrigerant? |
white with red band |
|
|
|
A container of recycle R-134a refrigerant that is being tested for non- commendable gases should be |
Stored out of direct sunlight |
|
|
|
The EPA allows the use of R-134a recovery- only equipment provided that the |
Equipment meets J2810 standards |
|
|
|
Technician A says that it is ok to use a disposable refrigerant tank to store recycled refrigerant. Technician B says that it is okk to fill an approved refrigerant tank to 70% of its gross weight rating Who's right? |
B only |
|
|
|
Before a container of stored recycled refrigerant is used, the container must be checked for |
Non-condensables gases |
|
|
|
Recovery equipment for R-134a refrigerant must meet standards set by |
SAE |
|
|
|
Alternative refrigerant uses a unique set of service fittings that |
Prevent accidental mixing of refrigerants |
|
|
|
Technician A says that R 477 refrigerant is accepted by the EPA as an alternative for retrofit Technician B says that R-134a refrigerant is accepted by the EPA as an alternative for retrofit Who's right? |
B only |
|
|
|
SAR standard J2099 specified that the maximum level non- condensables gases in recycled R-134a should not exceed |
1.5% by volume |
|
|
|
When service equipment hoses with manual shut of valves are not connected to an A/C system, the valves should be in the |
Closed position |
|
|
|
Technician A says that R-1234yf may be used to retrofit an R-134a system Technician B says that R-1234yf is an ozone depleting gas Who's right? |
A only |
|
|
|
A technician who successfully completed the training and certification in an EPA approved section 609 program can legally service MVAC system that use any of these refrigerant except |
R-22 |
|
|
|
R-134a service hoses are color coded with a |
Black stripe |
|
|
|
Technician servicing an MVAC system should do any of these EXCEPT |
store refrigerant in a disposable container |
|
|
|
Requirements for recovery/recycling/ recharging equipment for R-1234yf refrigerant are set by SAE standard |
J2843 |
|
|
|
Recovery only equipment timeline |
J2209: for CFC R-12 J1732: for HFC 134a J2810: newest standard |
|
|
|
Recovery/recycling equipment standards |
J1990: For R-12 J2210: for R134a J2788: latest |
|
|
|
R-1234yf refrigerant has a global warming potential of |
4 |
|
|
|
R-1234yf is a preferred refrigerant over R-134a because |
It has a low GWP |
|
|
|
Which of these is a flammable refrigerant, unacceptable under SNAP as a substitute for CFC-12 |
HC-12a |
|
|
|
Empty disposable R-134a refrigerant containers should be |
Evacuated into a recovery/ recycling machine |
|
|
|
1 lb is equal to |
16 ounces |
|
|
|
Replacement hoses must meet the standard for permeability under the SAE standard |
J2064 |
|
