For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?
Correct answer: A. Di, opt = 3.9 Q0.45 ρ0.13
- A. Di, opt = 3.9 Q0.45 ρ0.13
- B. Di, opt = 3.9 Q0.45. μ0.95
- C. Di, opt = 4.7 Q0.36. μ3.2ρ0.13
- D. Di, opt = 3 Q0.36. μ0.88
Explanation
For turbulent flow of a relatively low-viscosity fluid in commercial steel pipe, the usual economic-diameter correlation depends mainly on flow rate and density, giving Di,opt ≈ 3.9Q^0.45ρ^0.13 inches. The other choices have inappropriate or incomplete viscosity dependence.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Fluid Flow Operations
909 free Fluid Flow Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Fluid Flow Operations questions
(Le/D) for a Tee (used as elbow, entering run) would be around _______________________?
The dust collection efficiency of a cyclone separator_________________?
Frame thickness in the plate and frame filter press is normally in the range of ______________ inches?
Power required for agitation depends upon the______________________?
Crude oil is pumped by a _______________ pump?
1 centistoke is equal to ______________ Redwood I seconds?