Question

Calculate the flow of air through two square openings of size 0.36 m with the wind blowing at a speed of 5 km/h. Given the value of K is 0.3.

(a) 174.4 m^3/h

(b) 194.4 m^3/h

(c) 267.4 m^3/h

(d) 234.4 m^3/h

The question was asked in a job interview.

My doubt is from Air Conditioning in portion Acoustics and Ventilation of Construction & Building Materials

Answer 1

The correct answer is (b) 194.4 m^3/h

To explain: The flow through an opening is given by the expression Q = K.A.V. Therefore, the flow of air through two square openings of size 0.36 m with the wind blowing at a speed of 5 km/h is 0.3 x 0.36 x 0.36 x 5000 = 194.4 m^3/h.