# 1. Oil flows in a pipe at a rate of 4000 GPM. The head loss over a length of 10,000 ft of the pipe..

1. Oil flows in a pipe at a rate of 4000 GPM. The head loss

over a length of 10,000 ft of the pipe having a surface roughness of 0.0018 in,

is 75 ft. Find the pipe diameter. Assume oil _ = 0.36 ft2 /h.

2. The number of tubes of a shell and tube heat exchanger N

is given but we do not know the tube diameter, d. To determine the tube

diameter, a pump is used to circulate flow inside the tubes. The flow rate and

the pressure drop are then carefully measured. Use the specified data and find

the tube inside diameter.

Data: N = 40, Ltube = 3 m, _P = 34.5 kPa,

V= 31.55 lit/s, T = 20 C.