EPA 608 Core Test Sample UPDATED
Exam Questions and CORRECT Answers
As of what date did it become unlawful to release Class 1 and Class 2 refrigerants to the
atmosphere? - CORRECT ANSWER July 1, 1992
What is the ozone layer and why is it important to us on Earth? - CORRECT
ANSWER Protective shield for Earth from the sun's harmful ultraviolent (UV) rays in the
stratosphere layer that extends about 6 to 30 miles above earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is? -
CORRECT ANSWER Chlorine
What is an ozone molecule made of? - CORRECT ANSWER Three oxygen atoms (O3)
Which refrigerant is a CFC? - CORRECT ANSWER R-12
What is the name of the atom that attacks ozone molecules? - CORRECT ANSWER Chlorine
and bromine atoms emitted into the atmosphere
Which refrigerant is a HFC? - CORRECT ANSWER R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules. - CORRECT
ANSWER Chlorine releases one of the oxygen atoms and forms two O2 oxygen ozone
molecule and repeat the process
Which refrigerant contains no chlorine? - CORRECT ANSWER R-134A
Name the refrigerant types that belong to CFCs, HCFCs and HFCs - CORRECT
ANSWER All of the above are correct
, The rule of thumb for refilling approved cylinders is a maximum of --- percent liquid? -
CORRECT ANSWER 80%
What do the letters in "HCFC" stand for? - CORRECT ANSWER hydrochlorofluorocarbons
To recover refrigerant is to? - CORRECT ANSWER Remove a refrigerant in any condition
from a system in either an active or passive manner, and store it in an external container without
necessarily testing or processing
What is ODP? - CORRECT ANSWER Ozone Depletion Potential
R-134A is a "drop in" refrigerant for? - CORRECT ANSWER R-134A is not a drop-in
refrigerant
Name some of the health and environment effects of ozone depletion - CORRECT
ANSWER All of the above
The condition and state of the refrigerant leaving a receiver is? - CORRECT
ANSWER Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone? - CORRECT
ANSWER All of the above
The component of an air conditioning system that changes a low pressure vapor to a high
pressure vapor is the? - CORRECT ANSWER Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how do they get here? -
CORRECT ANSWER CFCs will not dissolve in water or break down into compounds that
dissolve in water. Wind moves them into the Stratosphere
Exam Questions and CORRECT Answers
As of what date did it become unlawful to release Class 1 and Class 2 refrigerants to the
atmosphere? - CORRECT ANSWER July 1, 1992
What is the ozone layer and why is it important to us on Earth? - CORRECT
ANSWER Protective shield for Earth from the sun's harmful ultraviolent (UV) rays in the
stratosphere layer that extends about 6 to 30 miles above earth
The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is? -
CORRECT ANSWER Chlorine
What is an ozone molecule made of? - CORRECT ANSWER Three oxygen atoms (O3)
Which refrigerant is a CFC? - CORRECT ANSWER R-12
What is the name of the atom that attacks ozone molecules? - CORRECT ANSWER Chlorine
and bromine atoms emitted into the atmosphere
Which refrigerant is a HFC? - CORRECT ANSWER R-134A
Describe how one Chlorine atom can destroy 100,000 ozone molecules. - CORRECT
ANSWER Chlorine releases one of the oxygen atoms and forms two O2 oxygen ozone
molecule and repeat the process
Which refrigerant contains no chlorine? - CORRECT ANSWER R-134A
Name the refrigerant types that belong to CFCs, HCFCs and HFCs - CORRECT
ANSWER All of the above are correct
, The rule of thumb for refilling approved cylinders is a maximum of --- percent liquid? -
CORRECT ANSWER 80%
What do the letters in "HCFC" stand for? - CORRECT ANSWER hydrochlorofluorocarbons
To recover refrigerant is to? - CORRECT ANSWER Remove a refrigerant in any condition
from a system in either an active or passive manner, and store it in an external container without
necessarily testing or processing
What is ODP? - CORRECT ANSWER Ozone Depletion Potential
R-134A is a "drop in" refrigerant for? - CORRECT ANSWER R-134A is not a drop-in
refrigerant
Name some of the health and environment effects of ozone depletion - CORRECT
ANSWER All of the above
The condition and state of the refrigerant leaving a receiver is? - CORRECT
ANSWER Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone? - CORRECT
ANSWER All of the above
The component of an air conditioning system that changes a low pressure vapor to a high
pressure vapor is the? - CORRECT ANSWER Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how do they get here? -
CORRECT ANSWER CFCs will not dissolve in water or break down into compounds that
dissolve in water. Wind moves them into the Stratosphere
