Type 1 One
Recovery equipment for maintenance, service or repair of small appliances must be certified by an EPA-approved laboratory.
True
False
True
If a strong odor is detected while performing a refrigerant recovery process;
the condenser has been operating incorrectly.
a compressor burnout has likely occurred.
the wrong oil has probably been installed in the unit.
a compressor burnout has likely occurred.
A small appliance is defined by EPA as;
appliances charged, and hermetically sealed in a factory that contain 8 lbs or less of refrigerant.
appliances charged, and hermetically sealed in a factory that contain 10 lbs or less of refrigerant.
appliances with internal volumes no greater than 3 cubic feet.
appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant.
appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant.
When working with refrigerants (connecting and disconnecting hoses) you should, at a minimum, be following what safe work practices?
Wearing insulated boots and hard hat
Wearing eye protection and butyl-lined gloves
Using SCBA and electrical safety gloves
There is no recommended safety equipment
Wearing eye protection and butyl-lined gloves
There is no such thing as a "drop-in" substitute for R22.
True
False
True
R-600a is what type of refrigerant?
HCFC
HFO
HC
CFC
HC
Large refrigerant leaks in a confined area may cause suffocation because:
refrigerants are heavier than air and can displace oxygen.
refrigerants are lighter than air and can displace oxygen.
refrigerants will displace oxygen from the chemicals disbonding when they reach the air.
they cause a chemical reaction.
refrigerants are heavier than air and can displace oxygen.
What should you know before beginning the refrigerant recovery procedure?
System superheat
Type of refrigerant you're working with
Subcooling
Bubble and dew points
Type of refrigerant you're working with
It is mandatory to repair a leak on a small appliance.
True
False
False
Refrigerant that is vented off the top when filling a charging cylinder must be recovered if it is a;
CFC
HCFC
HFC
CFC, HCFC, or HFC.
CFC, HCFC, or HFC.
If after installing and opening a piercing valve on an appliance the system reads 0 psig, you should:
not begin the recovery procedure.
begin the recovery procedure.
keep recharging the system until there is refrigerant to recover.
perform a system retrofit to a more environmental friendly refrigerant.
not begin the recovery procedure.
What is the maximum normal charge of HCFC or HFC refrigerants in an appliance that is allowed to use system-dependent recovery equipment?
5 lbs
10 lbs
15 lbs
20 lbs
15 lbs
The passive system-dependent recovery process for small appliances captures refrigerant in:
a pressurized container.
a vacuum pump.
a non-pressurized container.
a filter drier.
a non-pressurized container.
When recovering refrigerant into a non-pressurized container from a refrigerator with an inoperative compressor you may have to:
heat the compressor and hit it with a rubber mallet.
do nothing. Its not necessary to recover the refrigerant.
wrap the compressor in ice.
retrofit the system with a different refrigerant.
heat the compressor and hit it with a rubber mallet.
If, after installing and opening an access valve for the purpose of recovering the appliance’s refrigerant, you find that the system pressure is 0 psig;
utilize recovery equipment to achieve a 4-inch vacuum.
pressurize the system with nitrogen prior to recovery.
refrigerant recovery cannot begin.
refrigerant recovery cannot begin.
To monitor the 80% fill level in a recovery tank, which of the following is/are acceptable methods or devices?
Pressure measurement of the refrigerant.
Temperature measurement of the refrigerant.
The superheat or subcooling method.
Tank internal float device or refrigerant scale.
Tank internal float device or refrigerant scale.
When using the system-dependent recovery process and the compressor does not work you should:
not recover the refrigerant.
fix the compressor to recover the refrigerant.
attach the low side hose for refrigerant recovery.
access both the high and low side for refrigerant recovery.
access both the high and low side for refrigerant recovery.
Without any non-condensable impurities, and stored at a room temperature of 80°F, a storage cylinder of R-134a will have a pressure of approximately:
80 psig
97 psig
100 psig
87 psig
87 psig
Which of the following is a very high-pressure refrigerant that generally does not need to be recovered?
R-410A
R-744
R-22
R-134a
R-744
An appliance with an operating compressor and completely restricted capillary tube or metering device requires:
running the compressor and recovering from the low side of the system only.
installation of access fittings on both the high and low-pressure sides of the system.
only one access valve on the high side of the system.
that you never allow the refrigerant to go to the high side of the system.
only one access valve on the high side of the system.
On a system with an operating compressor, recovery equipment must be capable of recovering;
95% of the refrigerant or achieving 5 inches of vacuum.
90% of the refrigerant or achieving 4 inches of vacuum.
80% of the refrigerant or achieving 4 inches of vacuum.
100% of the refrigerant or achieving 0 inches of vacuum.
90% of the refrigerant or achieving 4 inches of vacuum.
What is the industry standard recovery rate for recovery devices for use with small appliances with a non working compressor?
60% of the refrigerant.
70% of the refrigerant.
80% of the refrigerant.
90% of the refrigerant.
80% of the refrigerant.
New household refrigerators may not be factory charged with which refrigerant:
R-404a
R-600a
There are no refrigerants in new refrigerators
R-290
R-404a
CFCs and HCFCs not only decompose into hydrochloric and hydrofluoric acids at high temperatures, but also what gas?
Natural gas
Phosgene gas
Propane gas
Carbon Monoxide
Phosgene gas
When a system has experienced compressor burnout, a technician should watch for sign of oil contamination because:
the system will need to be shut down.
the contaminants will damage the recovery equipment.
the system will have to be flushed if contaminants are present.
contaminants cannot be removed and the refrigerant will need to be destroyed.
the system will have to be flushed if contaminants are present.