Sheet Metal Duct Systems Module 9
Questions and Answers | Latest Version
| 2024/2025 | Graded A+
What is the primary purpose of sheet metal duct systems?
✔✔To distribute air efficiently for heating, cooling, and ventilation within a building.
Why is it important to seal duct joints properly?
✔✔To prevent air leakage, maintain system efficiency, and ensure proper air distribution.
What is a rectangular duct commonly used for?
✔✔It is typically used in larger installations where space constraints require a flat-profile duct.
What is the function of a duct takeoff?
✔✔To connect the main duct to branch ducts, allowing air to flow into different areas of the
system.
Why are dampers used in duct systems?
1
, ✔✔To regulate airflow within the system, allowing for better control of temperature and
ventilation.
What is the purpose of insulation on sheet metal ducts?
✔✔To reduce heat loss or gain and minimize condensation on the duct surface.
Why are round ducts often preferred in some installations?
✔✔They provide better airflow efficiency and less resistance compared to rectangular ducts.
What is the role of a turning vane in a duct system?
✔✔To guide airflow smoothly around bends, reducing turbulence and maintaining system
efficiency.
Why is it important to calculate duct sizing accurately?
✔✔To ensure efficient airflow, minimize energy loss, and prevent system noise.
What material is commonly used for constructing sheet metal ducts?
✔✔Galvanized steel is widely used due to its durability and resistance to corrosion.
2
Questions and Answers | Latest Version
| 2024/2025 | Graded A+
What is the primary purpose of sheet metal duct systems?
✔✔To distribute air efficiently for heating, cooling, and ventilation within a building.
Why is it important to seal duct joints properly?
✔✔To prevent air leakage, maintain system efficiency, and ensure proper air distribution.
What is a rectangular duct commonly used for?
✔✔It is typically used in larger installations where space constraints require a flat-profile duct.
What is the function of a duct takeoff?
✔✔To connect the main duct to branch ducts, allowing air to flow into different areas of the
system.
Why are dampers used in duct systems?
1
, ✔✔To regulate airflow within the system, allowing for better control of temperature and
ventilation.
What is the purpose of insulation on sheet metal ducts?
✔✔To reduce heat loss or gain and minimize condensation on the duct surface.
Why are round ducts often preferred in some installations?
✔✔They provide better airflow efficiency and less resistance compared to rectangular ducts.
What is the role of a turning vane in a duct system?
✔✔To guide airflow smoothly around bends, reducing turbulence and maintaining system
efficiency.
Why is it important to calculate duct sizing accurately?
✔✔To ensure efficient airflow, minimize energy loss, and prevent system noise.
What material is commonly used for constructing sheet metal ducts?
✔✔Galvanized steel is widely used due to its durability and resistance to corrosion.
2
