Why should the technician watch for signs of contamination in the oil when recovering refrigerant from a system that experienced a compressor burnout?
The system will have to be flushed if contaminants are present
. … A compressor burnout has occurred.
What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated quizlet?
What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated?
Turn refrigerant in for reclamation.
What is the service procedure if the refrigerant recovery cylinder is suspected to be contaminated?
If the refrigerant in a recovery cylinder is suspected to be contaminated,
a pressure reading of the cylinder should be taken and compared to a pressure
/temperature chart. Recovery cylinders are specifically designed to be refilled. Recovery cylinders have 2 ports, one liquid and one vapor.
Which of the following is not a recommended safety practice when operating refrigerant recovery recycling equipment?
Which of the following is NOT a recommended safety practice when operating refrigerant recovery or recycling equipment?
Wear safety glasses
. Wear protective gloves.
When recovering refrigerant into a non pressurized container from a refrigerator?
Which of the following refrigerants is most commonly used as a replacement for R-12 in new household refrigerators? 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
.
How would you remove moisture from refrigerant in a system?
Moisture can be removed from a refrigeration system by
applying a vacuum
. POEs hold moisture more tightly than mineral oil. But in the case of R-134a, the refrigerant effectively competes with the ester lubricant in partitioning the water (i.e., the water moves from the lubricant to the refrigerant).
Which refrigerant is very high pressure and does not need to be recovered?
Co2 refrigerant R-744 (Carbon dioxide)
is a very high-pressure refrigerant and generally does not need to be recovered.
Which condition requires accessing both the high and low side of the system for refrigerant recovery?
using the system dependent (passive) recovery process, which condition requires accessing both the high and low side of the system for refrigerant recovery?
it is necessary to heat the compressor and strike it with a rubber mallet.
How many access valves are needed to recover the refrigerant on a sealed system?
How many access valves do we need to recover refrigerant on a system that is sealed? We only need
one access valve
.
Where must you connect a hose in order to recover liquid refrigerant?
You need to connect a hose from
the low side of the manifold to the high side of the recovery unit
.
Which of the following is true if a system will not hold a vacuum after it has been evacuated?
Which of the following is TRUE if a system WILL NOT hold a vacuum after it has been evacuated?
The system is ready to be charged.
Which refrigerant is not allowed to be vented?
Section 608 prohibits individuals from intentionally venting ODS refrigerants (including
CFCs and HCFCs
) and their substitutes (such as HFCs), while maintaining, servicing, repairing, or disposing of air- conditioning or refrigeration equipment.
When two or more refrigerants are mixed what must be done with the mixture?
If we mix two or more refrigerants with each other, We must
keep it in a closed container to avoid the quick vaporization
and we also have to take safety measures to avoid the toxic hazards of the mixture.
When recovering refrigerant from small appliances you must recover?
- 80 percent of the refrigerant when. The technician uses recovery or recycling equipment manufactured before November 15, 1993, or. …
- 90 percent of the refrigerant when.
When should refrigerant be removed from the condenser outlet?
Refrigerant should be removed from the condenser outlet
if the condenser is below the receiver
. In a building that has an air-cooled condenser on the roof and an evaporator on the first floor, recovery should begin from the liquid line entering the evaporator.
Which of the following repairs would always be considered major under EPA’s regulations?
the system water pumps, the recovery compressor, and the recovery condenser water should all be on. Which of the following repairs would ALWAYS be considered “major” under EPA’s regulations?
Replacement of an evaporator coil
.
