Duct Systems and Air Distribution

The lecture covers air distribution systems, focusing on components, duct design, and classification. It explains the flow of air through ducts, head loss, and pressure losses, including friction and dynamic losses. The session concludes with a brief wrap-up and contact information for queries.

What is the primary function of a supply air duct in an air distribution system?

• To carry air from the air handling unit to the room

• To take out room air for circulation

• To regulate the temperature of the air

• To introduce air into the room

Which material is NOT commonly used for ducting?

• Fiberglass

• Plastic

• Wood

• Galvanized steel

How are ducts classified based on shape?

• High and low velocity

• Rectangular, round, and oval

• High, medium, and low pressure

• Large and small diameter

What is the significance of the velocity classification of ducts?

• It influences the color of the duct

• It determines the material used for the duct

• It affects the shape of the duct

• It categorizes ducts into high and low velocity

Which factor is NOT considered in the classification of ducts?

• Shape

• Pressure

• Velocity

• Color

What equation is used to calculate head loss in a duct system?

• Newton's Law

• Ohm's Law

• Bernoulli's Equation

• Darcy-Weisbach Equation

What is the role of fan power in an air distribution system?

• To cool the air

• To overcome head loss

• To heat the air

• To filter the air

What are the two main types of pressure losses in duct systems?

• Static and dynamic losses

• Friction and dynamic losses

• Velocity and pressure losses

• Thermal and mechanical losses

Which type of duct is preferred for saving space and ease of fabrication?

• Circular ducts

• Rectangular ducts

• Oval ducts

• Triangular ducts

What causes dynamic pressure losses in duct systems?

• Friction between air particles

• Changes in cross-section and direction

• Temperature variations

• Humidity levels