EPA 609
To repair a chiller operating with R-22, the technician:
must have a Type II certification.
If a leaking appliance with a regulated refrigerant is not going to be repaired, it must be:
retrofitted or retired within 12 months.
The use and release of CFCs and HCFCs has a far reaching effect on ________.
the stratosphere
The chlorine in CFCs and HCFCs:
will not dissolve in water.
Recovery equipment must be:
Certified by an EPA-approved testing laboratory.
EPA regulations state that removal of which component constitutes a "major repair"?
Compressor
Before shipping any used refrigerant cylinders, what standards should be checked?
Department of Transportation
Crop loss, eye disease and skin cancer have been attributed to:
Depletion of Stratospheric ozone
Disposable cylinders must be:
Discarded.
Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by:
EPA approved laboratory
After the refrigerant has been recovered, which of the following should be used to flush the system?
Nitrogen
After the installation of any type of system, the unit should first be:
Pressurized with an inert gas and leak checked.
Which of the following refrigerant has a GWP of "1"?
R-1233zd
Which HC refrigerant is allowed for use in new domestic small appliances?
R-600a
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should;
Run the compressor and recover from the high side of the system only.
Which of the following best describes the refrigerant recovery process from an R-123 system?
Start with liquid removal and then switch over to vapor recovery.
The standard for machine room safety is:
ASHRAE-15
A small appliance is defined by the EPA as:
Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs. or less of refrigerant.
A high-pressure appliance containing less than 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of:
0 inches of vacuum
A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of;
10 inches of vacuum
When removing oil from a lowpressure system, a temperature of what must be attained?
130 degrees F.
The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is:
25 mm of Hg absolute.
Leaks must be repaired on industrial process and refrigeration units with a 50-pound charge or greater when the annualized leak rate reaches _____ or more
30%
When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of;
36 degrees.
The EPA requirement for repairing leaks on small appliances states that:
Leaks should be repaired whenever possible.
What type of equipment can be worked on with Type III certification?
Low-pressure
Technicians who perform sealed-system service on small appliances must have:
Type I or Universal certification
Water must be circulated through the tubes when evacuating refrigerant in order to prevent:
Water from freezing.
When a system is in deep vacuum, you should never:
energize the compressor.
A refrigerant cylinder designed to hold recovered refrigerant has a:
grey body and yellow top.
