Question

A liquid of density 0.1 kg/m^3 is flowing through a pipe at a rate of 15 kg/s, what will be the area of the pipe if the fluid velocity is 5 m/s?

(a) 30 m^2

(b) 45 m^2

(c) 75 m^2

(d) 90 m^2

The question was posed to me in a job interview.

The above asked question is from Flow Rate in chapter Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

Right answer is (a) 30 m^2

To explain: Volumetric flow rate of the liquid = 15/0.1 = 150 m^3/s, => Area of pipe = 150/5 = 30 m^2.