Unit 9 Recovery, Recycle, reclaim
Any person who performs maintenance, services, or repair that could reasonably be expected to release CFC or HCFC refrigerants into the atmosphere is ...?
A technician
Before a refrigerant that has been removed from a system can be sold to another customer, it must be processed to the _______ specifications.
AHRI 700
__________ is removing refrigerant from a system using a certified, self contained recovery machine.
Active recovery
A synthetic lubricant that works best with HCFC based refrigerant blends in refrigeration application is ...?
Alkylbenzene
The refrigerant R11 is a..?
CFC
The refrigerants that are thought to be the most damaging to earth's stratospheric ozone layer are the...?
CFC series
The number one contributor to global warming is...?
Chlorine
What substance reacts with the earth's stratospheric ozone layers?
Chlorine
Cylinders used in the recovery of refrigerant must be approved by the...?
Department of Transportation (DOT)
When one or more of the refrigerants in a blend will condense or evaporate at different rates than other refrigerants in the same blend, _________ occurs.
Fractionation
The total equivalent warming impact (TEWI) takes into consideration both the direct and indirect ________ effects of refrigerants.
Global warming
An earth warming process caused by the atmosphere's absorption of heat energy radiated from the earth's surface is....?
Global warming or the greenhouse effect
The refrigerant R22 is a..?
HCFC
The refrigerants R404A and R410A are...?
HCs
The near azeotropic refrigerant blends...?
Have more than one boiling point, fractionate when being charged in the vapor state, experience temperature glide.
The azetropic mixture refrigerants...?
Have only one boiling point, do not fractionate when being charged in the vapor state, includes R500, R502
Most refrigerants are _________ than air.
Heavier
Molecules that contain nothing but hydrogen and carbon are...?
Hydrocarbon
Depletion of earth's ozone shield will __________ the sun's ultraviolet rays on the earth's surface.
Increase
A _______ is a fitting on a refrigeration system that either manually or automatically closes off when a service technician takes it off the pressurized system or recovery device.
Low loss fitting
The number assigned a refrigerant that identifies the rate at which that refrigerant is thought to deplete the ozone layer is known as...?
ODP
Ozone is a type of...?
Oxygen
_________ is also known as system dependent recovery, where the internal pressure of the refrigeration system and/or the system's compressor aids in the refrigerant recovery process.
Passive recovery
A ________ is a valve used for accessing a small appliance that has a sharp pin that is driven through the system's tubing.
Piercing valve.
A synthetic glycol based lubricant often used in automotive applications with R134a is...?
Polyalkylene glycol
A synthetic lubricant used in R134a refrigeration and air conditioning systems is...?
Polyol ester
When refrigerant is removed from a system, it must be ...?
Recovered
A ________ is a valve on a refrigeration system used for easy access having a valve core, a needle to depress, and a cap to prevent leaks.
Schaefer valve.
When a blend of refrigerants has many different temperatures when it evaporates and condenses at a given pressure, _______ occurs.
Temperature glide
An agreement signed by the United States and other countries to control the release of ozone depleting substances with phase out dates and production bans is...?
The Montreal Protocol
An index that measures the direct effects of global warming created by chemicals emitted directly into the atmosphere is...?
The global warming potential (GWP)
True or False: R407C is a near azeotropic refrigerant blend.
True
True or False: R410A, R402A, R402B, and R409A are near azeotropic refrigerant blends.
True
True or False: R507 is an azetropic refrigerant blend.
True
True or False: The correct refrigerant oils must be chosen for all of the above refrigerants.
True
A micron is a measurement of a level of a...?
Vacuum
Blended refrigerants whose temperature glide and fractionation exist to a larger extent than those of a near azeotropic blend of refrigerants are...?
Zoetropes