CFC Certification: Core Exam 2023 Questions and Answers

The greatest effect refrigeration has is on the ____________ - Answer- Stratosphere What is the nickname of the stratosphere? - Answer- Earth's security blanket The stratosphere is __________ ______ above sea level - Answer- 10-30 miles The stratosphere is made of _____ - Answer- Ozone What is the function of the stratosphere? - Answer- To protect us from UV radiation and maintain stable earth temperatures Effects of Ozone Depletion? - Answer- Crop loss; skin cancer; deforestation; increase in eye disease; reduced marine life; increased ground level ozone. What does chlorine do to ozone? What is formed? - Answer- It removes 1 oxygen atom from ozone and forms Chlorine Monoxide and leaves an O2 molecule 1 chlorine atom can destroy ________ ozone molecules - Answer- 100,000 Chlorine in CFC's will neither dissolve in _____ nor break down into ________ that dissolve in _____. - Answer- water; compounds; water Chlorine will eventually precipitate out of the atmosphere over a period of time, true or false? - Answer- False, chlorine does not rain out of the atmosphere What is ODP? - Answer- Ozone Depletion Potential Which refrigerant type has the highest ODP? Which has the least? - Answer- CFC's; HFC's What is a CFC? Name 2 examples - Answer- ChloroFlouroCarbon. R-11; R-12 What is an HCFC? Name 2 examples - Answer- HydroChloroFlouroCarbon; R-22; R-123 What is an HFC? Name 2 examples - Answer- HydroFlouroCarbon; R-134a; R-410a HVAC is regulated under which EPA section? - Answer- 608 What is the penalty for violation of section 608? - Answer- Fines up to $27,500 per day What is the bounty for "turning in" a section 608 violator? - Answer- $10,000 It is a violation to vent refrigerant with the exception of ________ _________. - Answer- De-minimus releases Its been illegal to vent CFC's/HCFC's since ______________ - Answer- July 1, 1992 Its been illegal to vent HFC's since ________ - Answer- November 15, 1995 What was the Montreal Protocol? When was it enforced? - Answer- An international treaty to regulate the use of ozone depleting substances; 1989 What are the 3 R's - Answer- Recovery; Recycle; Reclaim; Recover: Remove _________ from a system and store in a(n) _______ ____ - Answer- Refrigerant; Recovery cylinder Recycle: Clean refrigerant by _________ the ____ & _______ ________ from the refrigerant using ______ ______ - Answer- Separating; oil; removing moisture; filter-driers Reclaim: Process refrigerant to _______ standards for resale - Answer- ARI-700 Refrigerant recovery/recycling equipment manufactured after _____, must be EPA _______ and ________ to meet EPA standards. - Answer- 1993; certified; labelled What are the types of recovery devices? - Answer- System dependent and self contained A "system dependent" does what? - Answer- It captures refrigerant with the assistance of the components in the appliance A "self contained" does what? Example? - Answer- Uses its own means to draw refrigerant out of the system; Using a vacuum pump The sale of CFC/HCFC refrigerants is restricted to _______ _______ since __________ - Answer- Certified technicians; November 14, 1994 _______ is a R-12 drop in substitute - Answer- R-134a What is true about "esters"? - Answer- They cannot be mixed with other oils What do we use to leak test R-134a? - Answer- Pressurized Nitrogen What are ternary blends? What are they used with? - Answer- 3 part blends; synthetic alkylbenzene lubricant Most refrigerant oils are ___________ meaning they attract ________ ______ - Answer- hygroscopic; moisture easily Blended refrigerants leak at ______ _______due to different ______ _______ - Answer- Uneven rates; vapor pressures Blended refrigerants must be charged how? In what orientation? - Answer- As a liquid on the high side; upside-down What is a temperature glide? - Answer- A range of boiling/condensing points under 1 pressure. ______ _______ acts like a single component refrigerant with no temperature glide. (No fractionization) - Answer- Azeotropic Blends ________ that has been used to flush a system may be legally vented. - Answer- Nitrogen To check the general area for a leak, use what? To pinpoint a leak, use what? - Answer- An electronic leak detector; soap bubbles