Duct Sizing

What is the primary purpose of duct sizing in HVAC systems?

• To ensure proper air flow and distribution

• To reduce the cost of materials

• To increase the noise levels

• To minimize the size of the HVAC unit

Tags

NGSS.HS-PS3-4

Which of the following factors is most important when determining duct size?

• Color of the duct

• Material of the duct

• Air flow rate

• Length of the duct

In duct sizing, what does the term 'friction loss' refer to?

• Loss of air due to leaks

• Loss of air speed due to bends

• Loss of pressure due to resistance

• Loss of temperature due to insulation

Which scientific principle is primarily used in calculating duct size?

• Bernoulli's principle

• Newton's third law

• Pascal's law

• Boyle's law

What is the unit of measurement commonly used for duct size in HVAC systems?

• Meters

• Inches

• Liters

• Kilograms

How does increasing the diameter of a duct affect air flow?

• Increases air flow

• Decreases air flow

• Has no effect on air flow

• Reverses air flow direction

What is the effect of duct length on air pressure in a system?

• Longer ducts increase pressure

• Longer ducts decrease pressure

• Duct length has no effect on pressure

• Duct length reverses pressure direction

Which material is commonly used for ductwork due to its lightweight and corrosion resistance?

• Steel

• Copper

• Aluminum

• Plastic

What is the role of a duct calculator in duct sizing?

• To measure the temperature of air

• To calculate the cost of duct materials

• To determine the optimal duct size

• To assess the color of the duct

In an experiment, if the duct size is doubled, what happens to the velocity of air assuming constant flow rate?

• Velocity doubles

• Velocity halves

• Velocity remains the same

• Velocity quadruples