A bedroom supply-air exercise specifies 100 cubic feet per minute and an average duct velocity of 500 feet per minute. Using Q = velocity × area, what internal cross-sectional area is required for this airflow calculation?
- 0.20 square foot
- B5.00 square feet
- C50.00 square feet
- D0.02 square foot
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why A is correct
Area = 100/500 = 0.20 square foot. The bedroom label does not establish a universal duct diameter. Actual selection also requires the pressure-loss design and installation constraints; this question evaluates the supplied airflow relation only.