EPA 608 CORE EXAM TESTS COMBINED | VERIFIED TEST QUESTIONS WITH CORRECT SOLUTIONS

EPA 608 CORE EXAM TESTS COMBINED | VERIFIED TEST QUESTIONS WITH CORRECT SOLUTIONS Where is the stratosphere? - ANSWER 10 to 30 miles Where is ozone located? - ANSWER stratosphere What does ozone in the stratosphere above the earth consist of? a. Molecules containing 2 oxygen atoms b. Molecules containing 3 oxygen atoms c. Molecules containing 4 oxygen atoms d. Molecules containing 5 oxygen atoms - ANSWER b. Molecules containing 3 oxygen atoms Which of the following refrigerants has the lowest global warming potential? a. R-134a b. R-407C c. R-410A d. R-600a - ANSWER d. R-600a Which of the following gases is used as the baseline measurement for global warming potential? a. Ammonia b. Carbon Dioxide c. CFC-12 d. Propane - ANSWER b. Carbon Dioxide Which type of refrigerant typically has the lowest global warming potential? a. HCFCs b. HFOs c. HFCs d. All are equal - ANSWER b. HFOs The ozone layer protects us from... - ANSWER ultraviolet radiation The ozone layer helps to maintain... - ANSWER stable earth temperatures Depletion of ozone causes... - ANSWER crop loss, eye disease, skin cancer, reduced marine life, deforestation, increased ground level ozone. What does an ozone molecule consist of? - ANSWER 3 oxygen atoms What type of refrigerants, when released into the atmosphere, cause ozone depletion? - ANSWER cfcs and hcfcs What in refrigerants causes ozone depletion? – ANSWER chlorine What compound is formed when chlorine meets ozone? - ANSWER chlorine monoxide How many ozone molecules can be destroyed by one chlorine atom? - ANSWER 100,000 The rise in the amount of chlorine measured in the stratosphere over the past twenty years matches the rise in... –ANSWER fluorine. The chlorine in CFCs will break down in water (true/false). - ANSWER false The chlorine in CFCs will break down into compounds that will dissolve in water (true/false). - ANSWER false What does ODP stand for? - ANSWER ozone depletion potential HFCs have a higher ODP than CFCs (true/false). - ANSWER false Which refrigerant type has no ODP? - ANSWER HFCs What chemicals make up CFCs? - ANSWER chlorine flourine carbon What chemicals make up HCFCs? - ANSWER hydrogen chlorine fluorine carbon What chemicals make up HFCs? - ANSWER hydrogen fluorine carbon Give examples of CFCs? - ANSWER r-11, 12, 500 Give examples of HCFCs? - ANSWER r-22, 123 Give examples of HFCs? - ANSWER r-134a Who regulates section 608 of the clean air act? - ANSWER epa How much is the fine for releasing refrigerant into the atmosphere? - ANSWER 27,500 per day per violation. HFC refrigerants contain: A) helium, fluoride, and chlorine B) hydrazine, flouride, and chlorine C) helium, fluorine, carbon D) hydrogen, fluorine, carbon - ANSWER D) hydrogen, fluorine, carbon You heat a system during dehydration ________ A) to oxidize any acids in the system B) to increase oil viscosity and increase oil vaporization C) to raise the vapor pressure of the water in the system and decrease dehydration time D) to prevent oil oxidation and degradation - ANSWER C) to raise the vapor pressure of the water in the system and decrease dehydration time _____________________ makes HFO refrigerants less flammable than HC refrigerants A) Chlorine B) Fhosgene C) Fluorine D) Fractured oxygen - ANSWER C) Flourine Use ________________ to determine a safe pressure for leak testing A) the value on the low side of test pressure data plate B) the suction side operating pressure C) the saturation pressure of the refrigerant charge at 95 degrees D) 1.314 times the saturation pressure of the refrigerant charge at 95 degrees - ANSWER A) the value on the low side of test pressure data plate When planning to recovery flammable refrigerants, always ensure that______________________ A) the refrigerant is cooled first B) the recovery machine is rated for the refrigerant being recovered C) the recovery machine and the recovery tank are grounded D) both B and C - ANSWER D) both B and C