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

Only CFC and HCFC refrigerants

Answer

Only ammonia-based refrigerants

Answer

Only refrigerants over 50 pounds in a single system

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

The pressure a refrigerant exerts inside a sealed cylinder

Answer

The flammability rating of a refrigerant blend

Answer

The amount of refrigerant lost annually from a leaking system

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

Carbon-hydrogen bonds

Answer

Carbon-carbon double bonds

Answer

Oxygen-fluorine bonds

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

60%

Answer

90%

Answer

100%

Question 5

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

Accepted Answer

Gray body with a yellow top (shoulder)

Answer

Solid green body

Answer

Solid orange body

Answer

Blue body with a white top

Question 6

Before a recovery cylinder is reused, what must a technician verify regarding its hydrostatic test date?

Accepted Answer

It was tested within the last 10 years

Answer

It was tested within the last 5 years

Answer

It was tested within the last 2 years

Answer

Hydrostatic testing is not required for recovery cylinders

Question 7

What is the main purpose of recovering refrigerant rather than venting it before servicing a system?

Accepted Answer

To comply with the law and prevent release of ozone-depleting and greenhouse gases

Answer

To increase the system's operating pressure

Answer

To reduce the weight of the appliance for shipping

Answer

To convert the refrigerant into a non-regulated substance