EPA 608 Core Test Sample Questions Complete Answers
1. As of what date did it become unlawful to release Class 1 and Class II refrigerants into the
atmosphere?
- a. July 1, 1992 ✔️
2. What is the ozone layer and why is it important to us on Earth?
- b. Protective shield for Earth from the sun's harmful ultraviolet (UV) rays in the stratosphere layer
that extends about 6 to 30 miles above Earth ✔️
3. The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is?
- d. Chlorine ✔️
4. What is an ozone molecule made of?
- c. Three oxygen atoms (O₃) ✔️
5. Which refrigerant is a CFC?
- d. R-12 ✔️
6. What is the name of the atom that attacks ozone molecules?
- c. Chlorine and bromine atoms emitted into the atmosphere ✔️
7. Which refrigerant is an HFC?
- a. R-134A ✔️
8. Describe how one chlorine atom can destroy 100,000 ozone molecules.
- a. Chlorine releases one of the oxygen atoms and forms two O₂ oxygen molecules, leaving the
chlorine molecule free to attack another ozone molecule and repeat the process. ✔️
,9. Which refrigerant contains no chlorine?
- a. R-134A ✔️
Name the refrigerant types that belong to CFCs, HCFCs and HFCs
a. CFC R-11, R-12, R-500
b. HCFC R-22, R-123
c. HFC R-134a
d. All of the above are correct ✔️d. All of the above are correct
The rule of thumb for refilling approved cylinders is a maximum of ___ percent
liquid?
a. 60%
b. 79%
c. 80%
d. 90% ✔️c. 80%
What do the letters in "HCFC" stand for?
a. High Carbon Fluorine Chlorine
b. hydrochlorofluorocarbons
c. Harmful Carbon Fluorine Chlorine
d. highchlorinefluorocarbon ✔️b. hydrochlorofluorocarbons
To recover refrigerant is to?
a. 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
b. Reduce contaminants in used refrigerant by oil separation through filter
dryers.
,c. Reprocess refrigerant to new product specifications
d. Remove refrigerant and change ownership. ✔️a. 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?
a. Oxygen Destruction Properties
b. Ozone Depletion Potential
c. Ozone Destruction Properties
d. Oxygen Depletion Potential ✔️b. Ozone Depletion Potential
R-134A is a "drop in" refrigerant for?
36 | P a g e
a. R-12
b. R-22
c. R-11
d. R-134A is not a drop-in refrigerant ✔️d. R-134A is not a drop-in refrigerant
Name some of the health and environmental effects of ozone depletion.
a. Increased Temperature of the Earth
b. Increased Cases of Skin Cancer
c. Increased numbers of Cataracts in the eyes
d. All the above ✔️d. All the above
The condition and state of the refrigerant leaving a receiver is?
a. Subcooled liquid
b. Subcooled vapor
c. Superheated vapor
, d. Superheated liquid. ✔️a. Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone?
a. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in the amount of fluorine.
b. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in CFC emissions over the same
period.
c. Samples of air taken from the stratosphere over erupting volcanoes show
that volcanoes contribute a small quantity of chlorine to the stratosphere
compared to CFCs.
d. All the above ✔️d. All the above
The component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the?
a. Condenser
b. Metering device
c. Evaporator
d. Compressor
20.What characteristics ✔️d. Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how
do they get there?
a. CFCs are lighter than air atoms and rise into the Stratosphere.
b. CFCs will not dissolve in water or break down into compounds that dissolve in water. Wind moves
them into the Stratosphere
c. Heating of the CFCs makes them lighter than air.
d. a and c ✔️b. CFCs will not dissolve in water or break down into compounds that dissolve in water.
Wind moves them into the Stratosphere
1. As of what date did it become unlawful to release Class 1 and Class II refrigerants into the
atmosphere?
- a. July 1, 1992 ✔️
2. What is the ozone layer and why is it important to us on Earth?
- b. Protective shield for Earth from the sun's harmful ultraviolet (UV) rays in the stratosphere layer
that extends about 6 to 30 miles above Earth ✔️
3. The atom found in CFC and HCFC refrigerants that destroys ozone in the stratosphere is?
- d. Chlorine ✔️
4. What is an ozone molecule made of?
- c. Three oxygen atoms (O₃) ✔️
5. Which refrigerant is a CFC?
- d. R-12 ✔️
6. What is the name of the atom that attacks ozone molecules?
- c. Chlorine and bromine atoms emitted into the atmosphere ✔️
7. Which refrigerant is an HFC?
- a. R-134A ✔️
8. Describe how one chlorine atom can destroy 100,000 ozone molecules.
- a. Chlorine releases one of the oxygen atoms and forms two O₂ oxygen molecules, leaving the
chlorine molecule free to attack another ozone molecule and repeat the process. ✔️
,9. Which refrigerant contains no chlorine?
- a. R-134A ✔️
Name the refrigerant types that belong to CFCs, HCFCs and HFCs
a. CFC R-11, R-12, R-500
b. HCFC R-22, R-123
c. HFC R-134a
d. All of the above are correct ✔️d. All of the above are correct
The rule of thumb for refilling approved cylinders is a maximum of ___ percent
liquid?
a. 60%
b. 79%
c. 80%
d. 90% ✔️c. 80%
What do the letters in "HCFC" stand for?
a. High Carbon Fluorine Chlorine
b. hydrochlorofluorocarbons
c. Harmful Carbon Fluorine Chlorine
d. highchlorinefluorocarbon ✔️b. hydrochlorofluorocarbons
To recover refrigerant is to?
a. 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
b. Reduce contaminants in used refrigerant by oil separation through filter
dryers.
,c. Reprocess refrigerant to new product specifications
d. Remove refrigerant and change ownership. ✔️a. 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?
a. Oxygen Destruction Properties
b. Ozone Depletion Potential
c. Ozone Destruction Properties
d. Oxygen Depletion Potential ✔️b. Ozone Depletion Potential
R-134A is a "drop in" refrigerant for?
36 | P a g e
a. R-12
b. R-22
c. R-11
d. R-134A is not a drop-in refrigerant ✔️d. R-134A is not a drop-in refrigerant
Name some of the health and environmental effects of ozone depletion.
a. Increased Temperature of the Earth
b. Increased Cases of Skin Cancer
c. Increased numbers of Cataracts in the eyes
d. All the above ✔️d. All the above
The condition and state of the refrigerant leaving a receiver is?
a. Subcooled liquid
b. Subcooled vapor
c. Superheated vapor
, d. Superheated liquid. ✔️a. Subcooled liquid
What evidence do we have that CFCs and HCFCs are depleting the ozone?
a. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in the amount of fluorine.
b. The rise in the amount of chlorine measured in the stratosphere over the
past two decades matches the rise in CFC emissions over the same
period.
c. Samples of air taken from the stratosphere over erupting volcanoes show
that volcanoes contribute a small quantity of chlorine to the stratosphere
compared to CFCs.
d. All the above ✔️d. All the above
The component of an air conditioning system that changes a low pressure vapor
to a high pressure vapor is the?
a. Condenser
b. Metering device
c. Evaporator
d. Compressor
20.What characteristics ✔️d. Compressor
What characteristics make it easy for CFCs to reach the stratosphere and how
do they get there?
a. CFCs are lighter than air atoms and rise into the Stratosphere.
b. CFCs will not dissolve in water or break down into compounds that dissolve in water. Wind moves
them into the Stratosphere
c. Heating of the CFCs makes them lighter than air.
d. a and c ✔️b. CFCs will not dissolve in water or break down into compounds that dissolve in water.
Wind moves them into the Stratosphere
