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