Hvac Final Exam Air Cond Answers

What three criteria are zones in buildings based upon? {Ans: Exposure - space orientation/grouping Internal Loads - people, electrical, equipment Application - space use and/or schedule}How do you calculate CFM? {Ans: CFM = BTUh/1.08DT}What are the types of Axial Fans? {Ans: Propeller Tubeaxial Vaneaxial}What are fans used for? {Ans: to drive or move air through ductwork or in/out of spaces}What is a PTHP? {Ans: Packaged Terminal Heat Pump}What is velocity pressure? {Ans: pressure that exerts a force in direction of airflow}What are the types of centrifugal fans? {Ans: Forward Backward Airfoil Radial}List the heat transfer equipment (3) {Ans: Boiler Chiller Coil}What are the four equipment classifications? {Ans: Package Commercial Air Unit Built-Up Unit Residential Split-System Unit Computer/Telecom Room Units}What are the four components of an HVAC system? {Ans: Fans Pumps Compressor Evaporator}What is static pressure? {Ans: pressure that exerts a force inward or outward}List the 8 steps to duct work design. {Ans: 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