EPA 608 Core Test Sample Questions with

EPA 608 Core Test Sample Questions with Correct Answers As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere?

• July 1, 1992
• July 1, 1993
• November 14, 1994
• January 1, 1996 - Correct Answer a. July 1, 1992

What is the ozone layer and why is it important to us on Earth?

• Thin layer of R-22 in the atmosphere that filters UV.
• 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

• Thin layer of CFC and HCFC in the atmosphere that filters UV.
• Protective layer that shields UV in the Troposphere - Correct Answer b. 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?

• Fluorine
• Carbon
• Hydrogen
• Chlorine - Correct Answer d. Chlorine

What is an ozone molecule made of?

• Refrigerant 1 / 4

• Ammonia
• Three oxygen atoms (O3).
• Oxygen and ammonia. - Correct Answer Three oxygen atoms (O3).

Which refrigerant is a CFC?

• R-134A
• R-123
• R-22
• R-12 - Correct Answer d. R-12

What is the name of the atom that attacks ozone molecules?

• CFC atoms
• HCFC atoms
• Chlorine and bromine atoms emitted into the atmosphere
• a and b - Correct Answer c. Chlorine and bromine atoms emitted into the atmosphere

Which refrigerant is a HFC?

• R-134A
• R-123
• R-22
• R-12 - Correct Answer a. R-134A

Describe how one Chlorine atom can destroy 100,000 ozone molecules.

• 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.

• Chlorine locks up the ozone molecule and then and then goes after

another.

• Chlorine converts the ozone to bromine and then attacks more ozone 2 / 4

molecules.

• Chlorine can bleach 100,000 ozone molecules before it weakens. - Correct Answer 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.Which refrigerant contains no chlorine?

• R-134A
• R-123
• R-22
• R-12 - Correct Answer a. R-134A

Name the refrigerant types that belong to CFCs, HCFCs and HFCs

• CFC R-11, R-12, R-500
• HCFC R-22, R-123
• HFC R-134a
• All of the above are correct - Correct Answer d. All of the above are correct

The rule of thumb for refilling approved cylinders is a maximum of ___ percent liquid?

• 60%
• 79%
• 80%
• 90% - Correct Answer c. 80%

What do the letters in "HCFC" stand for?

• High Carbon Fluorine Chlorine
• hydrochlorofluorocarbons
• Harmful Carbon Fluorine Chlorine 3 / 4

• highchlorinefluorocarbon - Correct Answer b. hydrochlorofluorocarbons

To recover refrigerant is to?

• 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

• Reduce contaminants in used refrigerant by oil separation through filter

dryers.

• Reprocess refrigerant to new product specifications
• Remove refrigerant and change ownership. - Correct Answer 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?

• Oxygen Destruction Properties
• Ozone Depletion Potential
• Ozone Destruction Properties
• Oxygen Depletion Potential - Correct Answer b. Ozone Depletion Potential

R-134A is a "drop in" refrigerant for?36 | P a g e

• R-12
• R-22
• R-11
• R-134A is not a drop-in refrigerant - Correct Answer d. R-134A is not a drop-in refrigerant

Name some of the health and environmental effects of ozone depletion.

• Increased Temperature of the Earth
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