EPA Certification Exam Exam Prep Questions And Answers ()

EPA Certification Exam Exam Prep Questions And Answers (202472025) What characteristic or characteristics of CFCs make them more likely than other chlorine compo unds to reach the stratosphere? - ✔✔Dont disolve iin water Each chlorine atom in the stratosphere can destroy how many ozone molecules? - ✔✔100,000 ozone molecules Which refrigerant contains a CFC? R500, R12, R113 or R11? - ✔✔Theyre all CFC's HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain? - ✔✔Hydrogen, chlorine, flourine and carbon Which refrigerant is a chlorine free refrigerant? - ✔✔HFC R 134A What is the result damage to the ozone layer? - ✔✔Increases in human skin cancer According to the EPA, chlorine in the stratosphere is believed to come primarily from the CFCs rather than from volcanoes because - ✔✔-) The rise in the amount of chlorine measured in the stratosphere over the past 2 decades matches the rise of chlorine which has d ifferent natural sources of chlorune overthe same period -) The rise of chlorine in the statosphere matches the rise in CFCs over the same period -) samples of air taken over erupting volcanoes shows that volcanoes contribute a small amount of chlorine in the stratosphere compared to CFCs -) ALL OF THE ABOVE Which is a violation of the EPA clean air act? - ✔✔-) falsifying or failing to keep required records -) failing to keep evacuation levels before opening or disposing of appliances -) knowingly releasin g HFC's, HCFCs or CFC refrigerants -) ALL OF THE ABOVE Discarding of disposable cylinders is accomplished by - ✔✔Assuring that all refrigerant is recovered and that the cylinders are rendered useless then recycle the metal How much money can be awarded t o a person who supplies information leading to a conviction against the technician who is intentionally venting refrigerants or violatingsome other provision of the EPA CLEAN AIR ACT - ✔✔$10,000 CFC's will no longer be manufactured or imported into the U. S. after what year? - ✔✔1995 Since July 1, 1992 it has been illegal to: - ✔✔Knowingly releasing HCF or HCFC refrigerants in the U.S. Which compounds are controlled by the Montreal protocol? - ✔✔-) chloric floric carbons -) hydro chloric carbons -) halons -) all of the above EPA regulations cover all AC and refrigeration equipment when containing what? - ✔✔Any refrigerant or refrigerant substitute The syntetic substitute currently usedwith blends containing HCFCs is: - ✔✔Alcobenzine What is the significance of atheotropic mixture: - ✔✔The mixture combines to act as a single compound refrigerant Cooling occurs in a vapor compression refrigeration system when: - ✔✔Refrigerant liquid boils into a vapor Ozone depletion in the stratosphere is what type of problem: - ✔✔Its a GLOBAL problem The definition of recover is: - ✔✔To remove refrigerant in any condition from a system and store it an external container without neccesarily testing it Which of the following leak detection methods is considered by the EPA to be the effective for locating the general area of small leaks? - ✔✔Electronic ultrasonic testers Recovery during low ambient temperatures will: - ✔✔Slow the recovery process During dehydration of a refrigeration system the refrigeration sy stem is heated to: - ✔✔Decrease dehydration time To determine the safe pressure for leak testing one should use: - ✔✔Low side test data plate value Care should be used to avoid over filling refrigerant storage cylinders because: - ✔✔The internal pressure of the cylinders may rise and cause an explosion When transporting cylinders containing used refrigerants DOT REQUIRES that you: - ✔✔attach DOT classification tags What is the significance of an azeotropic mixture? - ✔✔The mixture combines to act like a single component refrigerant CF Cs are more likely to reach the stratosphere than other chlorine -containing compounds because___________. - ✔✔They are chemically ver y stable Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals? - ✔✔Chlorine, fluorine and carbon Which compound are the most damaging to the stratospheric ozone layer and have the highest ozone depletion potential rating? - ✔✔CFCs ________ test methods are assumed by the EPA as the most effective methods for locating the general area of small leaks. - ✔✔Electronic and ultrasonic If a reclamation company is shipping a cylinder containing mixed refrigerants they may ______. - ✔✔Agree to destroy the refrigerant but typically a substantial fee is charged One chlorine atom in the stratosphere is capable of destroying how many ozone molecules? - ✔✔100,000 ________is a CFC. A) R -141b B) R - 134a C) R -502 D) R -123 - ✔✔R-502 HCFC refrigerants cause ____________ damage to the stratospheric ozone layer in comparison to CFC refrigerants. - ✔✔Less The system vacuum gauge should be connected __________? - ✔✔As far as possible from the vacuum pump. Manufacture of CFCs was banned as of December 31, _______? A) 1994 B) 1995 C) 2000 D) 2010 - ✔✔1995