HVAC Unit 37 Air Distribution and Balance Review Questions with answers 2023 Name five changes that are made to air to condition it. - correct answer heat it, cool it, dehumdify it, clean it, and move it. pg 939 The two ways that fresh air enters a structure are ______ and ______. - correct answer infiltration and ventilation. pg 939 Which of the following types of fan is used to move large amounts of air against a low static pressure drop? ABCD - correct answer D) propeller. pg 945 T or F: Turbulence in airflow causes friction drop. - correct answer True. pg 968 Name two types of blower drives. - correct answer Belt drive and direct drive. pg 946 Pressure in ductwork is expressed in which of the following: ABCD - correct answer A) inches of water column. pg 941 Name two types of blower drives. - correct answer Belt drive and direct drive. pg 946 What is a common instrument used to measure pressure in ductwork? - correct answer Water manometer. pg 941 The three pressures created by moving air in ductwork are _____ pressure, ______ pressure, and _____ pressure. - correct answer Static, velocity, and total pressures. pg 943 Name the two types of return air systems in residential installations. - correct answer Individual return air systems and central return system. pg 967 What is the component that distributes air in the conditioned space? - correct answer Supply duct system. pg 947 Warm air heats a room better if distributed: ABCD - correct answer A) low in the room.pg 966 Name four materials used to manufacture duct. - correct answer Galvanized metal, aluminum, fiberglass ductboard, spiral metal duct, and flexible duct. pg 951
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