Hvac Air Distribution System Exam Answers Pdf

An instrument that gives a direct reading of relative humidity is called a? {Ans: Hygrometer.}Air systems used only for heating usually require_______ systems used for both heating and cooling. {Ans: Less airflow than.}The insulated duct that has the lowest pressure loss is? {Ans: Metal duct with outside insulator.}The lowest pressure level withing an air distribution system is found at the? {Ans: Input to the blower.}The lowest pressure level in an air distribution system is found at the? {Ans: Blower inlet.}The total pressure loss in an air duct distribution system and its components (excuding the air handler) is called the? {Ans: External static pressure loss.}When a change in the volume if airflow is know, fan law 1 can be used to calculate the? {Ans: New value to static pressure.}Fiberglass duct? {Ans: Can be use instead metal duct in many applications.}At sea level, every inch of Earth as an absolute pressure of? {Ans: 14.7psi.}In order to minimize the spread of smoke within a building, select smoke damperwith a leakage? {Ans: Class 1.}The velocity pressure in a air duct equals the? {Ans: The total pressure minus the static pressure.}A device use to