Refrigerant
A properly filled cylinder will never be more than ____ full
80%
____ recovery devices are so named because they depend on components of the system
System dependent
_____ refrigerants are higher toxicity
Class B
A technician who has a Universal Certification card can
Work on dehumidifiers, 5 ton air conditioners, and low pressure vessels
The discovery of a hole in the ozone layer caused many theories the most likely one is that it
was caused by the venting of refrigerants
A tank of refrigerant with R502 is colored
Purple
Under EPA's regulations, reclaimed refrigerant must meet ______ standards for purity
ARI 700
_____ refrigerants are not flammable when tested in air at 21oc and 101 kPa
Out of incineration, recovering, reclaiming, and recycling which one does NOT stop refrigerant from being purged
Incineration
The passing of refrigerant several times through a recovery device is called
Recycling
_______ in refrigerant causes ozone destruction
Chlorine
A second category of refrigerants currently available is Hydrochlorofluorocarbons (HCFCs). Although they contain chlorine, which damages the ozone layer, they also contain ______, which make them chemically less stable once they enter the atmosphere
Hydrogen
_____ refrigerants are flammable and have lower toxicity
A3
A method of preventing refrigerant releases is to
Properly use a recovery unit
The penalty for venting CFC or HCFC refrigerants is
up to $25,000
Ozone in the stratosphere consists of molecules containing _____ oxygen atoms
3-3
In cases where the refrigerant can't be reclaimed due to contamination with another refrigerant, the refrigerant ______
Must be destroyed by incineration at an approved facility
Of the three common types of refrigerant ____ has the highest high ozone depletion potential
CFC
In the 1980s several countries entered into an agreement regulating the production and use of CFCs. This treaty was called
Montreal protocol
When recovering bad R12 and R22 it should be stored in
Specially marked cylinders
CHF2CF3 refrigerant is a _____
HFC
Manufactured CFCs will be banned after December 31, ______
1995
____ test methods are assumed by the EPA as the most effective methods for locating the general area of small leaks
Electronic and ultrasonic
The refrigerants that will no longer be produced after 1996 in the U.S are called CFCs. An example of a CFC is
R12
Type 2
Refrigerant with no Chlorine is called
HFCs
CFCs are able to reach the stratosphere because
They are chemically very stable
CFCs are damaging to the ___ ozone layer
Stratospheric
All recovered refrigerants must be contained in ____
Special two port cylinders
Cleaning refrigerants to ARI 700 standards is called
Reclaiming
All devices used for refrigerant recovery must meet ____ standards
EPA
The lower-case letter following the refrigerant number, as in 134a for example is the
Form of the isomer
To be able to handle/use refrigerants after November 14th, 1994 a person must be
Certified
Properly dispose of refrigerants by
Recycling
It has been illegal to vent CFC and HCFC since
July 1st 1992