Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around______________________?
Correct answer: B
Explanation
The typical values for the equivalent length ratio (Le/D) are approximately 45 for a 45° elbow and 75 for a 180° bend.