What is the volumetric quantity of air moving in an 18"x18" duct with R-6 liner at a velocity of 1300 fpm?

What is the volumetric quantity of air moving in an 18"x18" duct with R-6 liner at a velocity of 1300 fpm?

• A. 1200 cfm
• B. 1500 cfm
• C. 1768 cfm
• D. 2000 cfm

Answer: (C)

To find the volumetric quantity of air moving in a duct, you can use the formula: Volumetric Flow Rate (CFM) = Area (sq. ft.) × Velocity (fpm) First, calculate the cross-sectional area of the duct. The duct dimensions are 18 inches by 18 inches. Convert these dimensions to feet: 18 inches = 1.5 feet Now, calculate the area: Area = Width × Height = 1.5 ft × 1.5 ft = 2.25 sq. ft. Next, use the velocity given in the question, which is 1300 feet per minute (fpm), to calculate the volumetric flow rate: Volumetric Flow Rate = Area × Velocity = 2.25 sq. ft. × 1300 fpm Now perform the multiplication: Volumetric Flow Rate = 2925 cubic feet per minute (cfm). However, the question indicates that the answer must match one of the provided answer choices. It is crucial to accurately analyze the calculation and determine if there was an error or adjustment needed to align with the anticipated context. After revisiting the calculations, there appears to be a discrepancy with the question or setup as the direct

To find the volumetric quantity of air moving in a duct, you can use the formula:

Volumetric Flow Rate (CFM) = Area (sq. ft.) × Velocity (fpm)

First, calculate the cross-sectional area of the duct. The duct dimensions are 18 inches by 18 inches. Convert these dimensions to feet:

18 inches = 1.5 feet

Now, calculate the area:

Area = Width × Height = 1.5 ft × 1.5 ft = 2.25 sq. ft.

Next, use the velocity given in the question, which is 1300 feet per minute (fpm), to calculate the volumetric flow rate:

Volumetric Flow Rate = Area × Velocity = 2.25 sq. ft. × 1300 fpm

Now perform the multiplication:

Volumetric Flow Rate = 2925 cubic feet per minute (cfm).

However, the question indicates that the answer must match one of the provided answer choices. It is crucial to accurately analyze the calculation and determine if there was an error or adjustment needed to align with the anticipated context.

After revisiting the calculations, there appears to be a discrepancy with the question or setup as the direct