Environmental Science > QUESTIONS & ANSWERS > EPA 608 Core Study Guide Questions and Answers Graded (All)

EPA 608 Core Study Guide Questions and Answers Graded

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EPA 608 Core Study Guide Questions and Answers Graded A+ A "compound gauge": ✔Ans✔ Can only be used for low pressures - Has different unit scales According to EPA regulations, when system f... lushing is required following a compressor burnout, the following refrigerant must be used: ✔Ans✔ System flushing with refrigerants is illegal A CFC contains: ✔Ans✔ Chlorine, fluorine, carbon A CFC - 11 cylinder is: ✔Ans✔ Orange An HFC-134a cylinder is: ✔Ans✔ Sky blue or pale blue A chlorine atom will combine with an ozone molecule to form: ✔Ans✔ Chlorine Monoxide An HCFC contains: ✔Ans✔ Hydrogen, chlorine, fluorine, carbon An HFC contains the following chemicals: ✔Ans✔ Hydrogen, fluorine, carbon Alkylbenzene lubricants are associated with: ✔Ans✔ Ternary blends All appliances currently manufactured or imported into the United States must be equipped with: ✔Ans✔ A service aperture or device to enable the removal of refrigerant A recovery cylinder is: ✔Ans✔ Gray with yellow top A refillable cylinder may be filled to a maximum of: ✔Ans✔ 80% of its liquid weight A refrigerant heated above its boiling point is: ✔Ans✔ Superheated A refrigeration system should not be recovered unless a gauge indicates a minimum pressure of _________ Psig within the system. ✔Ans✔ 15 Psig Any vapor refrigerant vented from the top of a graduated charging cylinder while filling the charging cylinder with liquid: ✔Ans✔ Must be recovered As of January 1st, 1996: ✔Ans✔ It is illegal to import or manufacture CFCs in the United States As of November 15, 1993, all recovery equipment must: ✔Ans✔ Be fitted with low loss fittings - Be certified by an EPA approved agency As of November 15, 1993, recovery machines: ✔Ans✔ Must be certified to meet EPA standards A system may be said to be properly dehydrated when: ✔Ans✔ The vacuum indicator has reached and held the required vacuum for a period of time A technician who violates provisions of the CAA: ✔Ans✔ May be fined - May lose certification - May be required to appear in court Refrigerant cylinders should be transported in a ______________ position: ✔Ans✔ Vertical An award of __________________ may be paid to a person providing information which leads to a penalty against a technician for violating CAA regulations. ✔Ans✔ $10,000 Before using an empty recovery cylinder, you should: ✔Ans✔ Evacuate the cylinder Before using a recovery unit, you should: ✔Ans✔ Check service valves positions - Check oil level Evacuate Blended refrigerants leak from a system: ✔Ans✔ In uneven amounts due to different vapor pressures CAA is the acronym for: ✔Ans✔ Clean Air Act Can ester based oils be mixed with other oils? ✔Ans✔ No Can mixed refrigerants be reclaimed? ✔Ans✔ No Can state or local laws governing refrigerant be less strict than federal laws? ✔Ans✔ No Can you use a open flame to warm a refrigerant bottle? ✔Ans✔ No CFCs are considered more harmful to the ozone layer than HCFCs because: ✔Ans✔ They are not water soluble, and do not wash out of the atmosphere Currently, almost all residential air conditioners use refrigerant ______________: ✔Ans✔ HCFC-22 For safety, a technician should always wear_____________ and ____________ when working around refrigerants: ✔Ans✔ Butyl gloves and goggles Heating a refrigerant cylinder with a torch can cause: ✔Ans✔ Explosion and injury - Refrigerant to de-compose into to a toxic material - Release of refrigerant to atmosphere HCFC-123 is: ✔Ans✔ Toxic HFC-134a is a 'drop in' replacement for CFC-12. ✔Ans✔ False HFC refrigerants usually require which family of lubricants: ✔Ans✔ Polyolesters [Show More]

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