The recovery of refrigerants is necessary to
An example of an HFC refrigerant is
A compound pressure gauge, typically used on the low side of the system, measures pressure in
_________ refers to the process of cleaning refrigerant by oil separation and single or multiple passes through filter-driers, which reduces moisture and acidity.
The high-pressure gauge on service manifold sets have a continuous scale, usually calibrated to read from
_________ is the process that returns refrigerant to new-product specifications that requires chemical analysis.
A cylinder with a gray body and a yellow top indicate that the cylinder is designed to hold
Which type of refrigerant is the most harmful to stratospheric ozone?
According to the EPA, a __________ leak detection method is considered to be the most effective for locating the general area of a small leak.
Long hoses between the unit and the recovery machine should not be used because they cause
Recovery equipment that relies upon the compressor in the system would be considered
A hermetic compressor must never be operated when
Systems charged with R-410a should be leak checked with
R-410a is not a typical blended refrigerant because
A ternary refrigerant blend is a __________ mixture.
In a refrigeration system, high pressure vapor is converted to high pressure liquid in the
Which of the following is an approved “drop-in” service replacement for R-12?
The proper method of discarding a disposable refrigerant cylinder is to
CFC refrigerants are so named because they contain the elements
Before you dispose of any system containing a refrigerant, you must
According to EPA regulations, which of the following procedures is not an approved technique for system cleanup after a burnout?
When using nitrogen to pressurize a system, you should always
What effects can ozone depletion have on the environment?
Non-azeotropic refrigerants leak from a system
