EPA 608 CORE Exam Questions and Answers (2022/2023) (Verified Answers) Graded A+

EPA 608 CORE Exam Questions and Answers (2022/2023) (Verified Answers) Graded A+ What characteristic or characteristics of CFCs make them more likely than other chlorine compounds 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, chlor ine, 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 fro m 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 different natural sources of chlorune overthe same period -) The rise of chlo rine 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 releasing HFC's, HCFCs or CFC refrigerants -) ALL OF THE ABOVE Discarding of disposa ble 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 to a person who supplies information leading to a conviction against the techni cian 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 regula tions 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 th e 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 system 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 very stable Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals? ✔✔ Chlorine , fluorine and carbon Which compound are the mos t 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 ultrasoni c 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 Positive evidence that CFCs are in the stratosphere comes from ____________? ✔✔ Measurements of CFCs in air samples taken from the stratosphere Under EPAs regulations reclaimed refrigerant must meet standards for purity before it can be resold ✔✔ ARI 700