EPA 608 609 Core 2

Question 1

Under the Clean Air Act, which substances are technicians prohibited from knowingly venting during the maintenance or disposal of appliances?

Accepted Answer

Class I, Class II, and most non-exempt substitute refrigerants such as HFCs

Answer

The venting prohibition covers CFCs, HCFCs, and their substitutes including HFCs, with only a few specifically exempted substances.

Question 2

What does the term 'ozone depletion potential' (ODP) measure?

Accepted Answer

A refrigerant's ability to destroy stratospheric ozone relative to CFC-11

Answer

ODP compares a substance's ozone-destroying capacity to CFC-11, which has an ODP of 1.0.

Question 3

Which type of chemical bond in CFC and HCFC molecules is primarily responsible for stratospheric ozone destruction?

Accepted Answer

Chlorine atoms released by UV radiation

Answer

UV light frees chlorine atoms, which catalytically destroy ozone molecules in the stratosphere.

Question 4

A technician recovers refrigerant into a recovery cylinder. To what maximum percentage of its rated capacity may the cylinder be filled by weight?

Accepted Answer

80%

Answer

Recovery cylinders must not be filled beyond 80% of capacity to leave room for liquid expansion.

Question 5

Which color marking identifies a Department of Transportation-approved refrigerant recovery cylinder?

Accepted Answer

Gray body with a yellow top (shoulder)

Answer

Recovery cylinders are marked with a gray body and yellow shoulder to distinguish them from virgin refrigerant cylinders.

EPA 608 609 Practice Test