HVAC Final Exam Correct Questions & Answers(RTED A+)

What is an HVAC System? - ANSWER all the items needed to maintain thermal comfort within a space or group of spaces What are the four components of an HVAC system? - ANSWER Fans Pumps Compressor Evaporator What is a PTAC? - ANSWER Packaged Terminal Air Conditioner What is a PTHP? - ANSWER Packaged Terminal Heat Pump List the heat transfer equipment (3) - ANSWER Boiler Chiller Coil What is a zone? - ANSWER A zone is a separately controlled space or group spaces What is VAV and describe it. - ANSWER Variable Air Volume - the volume of conditioned air varies to maintain room conditions What is CV and describe it. - ANSWER Constant Volume - the temperature of conditioned air varies to maintain room conditions What three criteria are zones in buildings based upon? - ANSWER Exposure - space orientation/grouping Internal Loads - people, electrical, equipment Application - space use and/or schedule What are the three type of HVAC systems? - ANSWER All Air - uses ducts, fans, and coils All Water - uses pipes, pumps, chillers, and boilers Air-Water - uses both air and water components What are the four equipment classifications? - ANSWER Package Commercial Air Unit Built-Up Unit Residential Split-System Unit Computer/Telecom Room Units What are some ductwork materials? - ANSWER Carbon Steel (Black Iron) Aluminum Stainless Steel Copper Fiber Reinforced Plastic Polyvinyl Chloride Polyvinyl Steel Concrete Rigid Fibrous Glass (Ductboard) Sheetrock Flex-duct Metal Round What is SMACNA? - ANSWER Sheet Metal & Air Conditioning Contractors National Association What is the purpose of ductwork insulation? - ANSWER prevent condensation reduce noise reduce heat loss/gain List the 8 steps to duct work design. - ANSWER 1. Study plans & arrange outlets 2. Select air outlets 3. Select duct distribution system 4. layout duct distribution system 5. Size ductwork 6. Calculate system static pressure 7. Select fans 8. analyze plans for conflicts or noise problems