Question 179Refrigeration & AC - 1st Asst/Chief

The correct answer is C) intentionally venting class I or II refrigerants to the atmosphere. After July 1, 1992, it became illegal to intentionally vent class I or II refrigerants to the atmosphere under the Clean Air Act. This regulation was put in place to reduce the release of ozone-depleting substances into the environment. Class I and II refrigerants, such as R-12 and R-22, were found to be harmful to the ozone layer, so their venting was prohibited to protect the environment. The other answer choices are incorrect because: A) working on a refrigeration system without permission is not illegal, B) producing class I refrigerants is not illegal, and D) mixing R-12 and R-22 is not the issue, but rather the intentional venting of these refrigerants.