#2 EPA 608 CORE

What is one of the most serious results of damage to the stratospheric ozone layer?

• Increased acid rain.

• Increased rates of asthma.

• Increased rates of skin cancer in humans.

• Higher natural background radioactivity.

What does ozone in the stratosphere above the earth consist of?

• Molecules containing 2 oxygen atoms.

• Molecules containing 3 oxygen atoms.

• Molecules containing 4 oxygen atoms.

• Molecules containing 5 oxygen atoms.

The piping connection to the vacuum pump should be;

• as short in length and as large in diameter as possible.

• suitably sized to connect to a gauge manifold.

• coiled and taped together.

• colored red or blue to meet codes.

Although the saturation pressure-temperature behavior of two refrigerants might be similar, of all the following characteristics of the refrigerants being compared what must also be considered?

• Latent heat of evaporation

• Cooling effect per volume

• Necessary volumetric displacement of the compressor

• Potential to oxidize copper tubing

The term "retrofit" refers to a change to the appliance in order to do what?

• Replace one of the major components.

• Repair it for use with different compressor.

• Convert it to use less energy.

• Convert it to use a different refrigerant.

Why are some hydrofluorooletin (HFO) refrigerants classified as "A2L"?

• They are no different than HFCs.

• They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.

• They are prohibited for use in the U.S.

• They have ozone depleting potentials, and have low global warming potentials.

Vacuum lines (hoses) should be;

• orange in color for safety reasons.

• as long as possible.

• smaller than pump intake connection.

• equal to or larger than pump intake connection.

Why are HFO refrigerants less flammable than hydrocarbon refrigerants?

• They contain chlorine.

• They contain bromine.

• They contain fluorine.

• They contain carbon.

What should a technician do if they lose their Section 608 certification card?

• Request a replacement from the EPA.

• Request a replacement from their certifying organization.

• Remain silent so as not to tell anyone they are out of compliance with that requirement.

• Have your friend vouch for you.

Which element in a CFC or HCFC molecule causes ozone depletion?

• Fluorine

• Chlorine

• Carbon

• Hydrogen