### Search for Multiple Choice Question (MCQ)

#### Uniform Flow Equations

A number of equations (semi-empirical and empirical) have been proposed to describe the relationship between discharge and slope (friction...

#### Comparison between Hazen-Williams Coefficient & Friction Factor

The following figure shows the comparison between the Hazen-Williams coefficient and the equivalent friction factor f values for a...

#### Why do we need Hazen-Williams & Manning’s Equations ?

The Darcy-Weisbach equation was originally derived experimentally but its use was limited by the difficulty in evaluating the friction...

#### Pumping Systems – Cavitation & Net Positive Suction Head “NPSH”

The net positive suction head NPSH for a pump is concept for which no clear consistent definition is available....

#### Moody Chart

The Moody chart was developed in 1944 as a means to graphically solve the Colebrook-White equation. Even to these...

#### Friction Factor Calculation using Hagen-Poiseuille Equation

The Hagen-Poiseuille equation is only applicable for laminar flow conditions. It is an analytical equation that applies regardless of...

#### Friction Factor Calculation using Barr’s Equation

Barr proposed the following equation based partly on an approximation to the logarithmic smooth turbulent element in the Colebrook-White...

#### Friction Factor Calculation using Blasius Equation

The Blasius equation is a simple equation which predicts the value of the friction factor f for very smooth...

#### Friction Factor Calculation using Colebrook-White Equation

Work in the first half of the 20th century led to the development of the Colebrook-White equation which is...

#### If the cross section area is the same throughout the length of a bent pipe, is the flow uniform or non-uniform ?

Non-uniform for sure ! Velocity is a vector. Any vector is defined by a magnitude and a direction. Having...