EPA TEST: Core Part 1
Greenhouse gases warm the earth by acting like a blanket blank the earth
Insulating
CFCs and HCFCs ability to destroy the ozone ranges from blank to blank
0 to 1
The stratosphere is located blank and blank miles above sea level
7 and 30
Greenhouse gases warm the earth by blank blank, slowing the rate in which it escapes to space
Absorbing energy
Chlorofluorocarbons are known as blanks
CFCs
CFCs and made of blank, fluorine & carbon
Chlorine
When CFCs and HCFCs are released into the air, it's their blank content that causes ozone depletion.
Chlorine
When a chlorine atom encounters an ozone molecule, it takes one Oxygen atom from the ozone forming a compound called blank blank (CIO), leaving an oxygen molecule behind.
Chlorine monoxide
Propane, butane, and hydrocarbon refrigerants are also known as blank blank
HC refrigerants
Hydrochlorofluorocarbons are known as blank
HCFCs
Blank are made of Hydrogen, Fluorine, and carbon. They do not contain chlorine, but have a high Global Warming Potential (GWP).
HFCs
HCFCs are made of blank, chlorine, fluorine & carbon
Hydrogen
An ozone molecule contains 3 blank blank
Oxygen atoms
A single chlorine atom can destroy up to 100,000 blank blank
Ozone molecules
HFO ODP: 0 GWP: 4 Used in automotive
R-1234yf
HFC ODP: 0 GWP: 1430 Used in auto, domestic refrigeration and commercial industries
R-134a
HFC ODP: 0 GWP: 2090 Operating pressure is 50% higher than R-22 and cannot be considered as a replacement for retrofitting existing systems.
R-410a
Natural refrigerants such as blank (carbon dioxide) that do not pose a threat to health or the environment according to EPA may be released back into the environment
R744
Class B means a refrigerant is consider more blank
Toxic
Some people believe that chlorine found in the stratosphere is from blank blank
Volcanic eruptions
The chlorine in CFCs and HCFCs will neither dissolve in blank or break down into compounds that dissolve in blank so they do not rain out of the atmosphere. (Both words are the same)
Water
Flammable refrigerants require a blank color marking on all process tubes, service connections, and pipes through which flammable refrigerant passes.
Red
Class A means a refrigerant is considered blank
Safer
The ozone layer is the Earth's blank blank
Security blanket
Problems such as crop loss, skin cancer, and eye disease are caused by blank blank blank
Stratospheric ozone depletion
HFCs and HFOs do not contain chlorine and have an Ozone Depletion Potential of blank
Zero