Author Question: What is the airflow through a 2 foot by 3 foot hole if the air velocity is 100 feet per minute? ... (Read 65 times)

jake · **on:** Jul 26, 2018

What is the airflow through a 2 foot by 3 foot hole if the air velocity is 100 feet per minute?

A) 2 3 = 6 sq feet; 6 100 FPM = 600 CFM B) 2 + 3 = 5 sq feet; 5 100 FPM = 500 CFM
C) 2 3 = 6 sq feet; 100 FPM / 6 = 17 CFM D) 100 CFM

Question 2

Most zone dampers in zoning systems _____.

a. are powered open and spring-return closed
b. are powered closed and spring-returned open
c. have four distinct positions
d. must serve more than one diffuser