UPPSC AE (CE) Quiz 38

Statement (I): In hydrodynamically smooth boundary the friction coefficient is a function of Reynold’s number (R_e) only. For turbulent flow.

Statement (II): In hydro-dynamically rough boundary the friction coefficient is a function of both Reynold’s number (R_e) and relative roughness .

Which of the following are correctly matched:

1. Turbulent flow = Moment Integral equation

2. Laminar flow = Hagen Poiseuille equation

The maximum velocity Umax, shear velocity u* and u mean velocity U in case of turbulent flow through circular pipe are related as:

Identify the nature of the boundary of the boundary flow for a laminar sublayer thickness of 16 mm and pt. of roughness coefficient as 60 mm

The Prandt mixing length for turbulent flow through pipes is:

In Free vortex, radius of cylinder is

The integral momentum equation requires the following assumption in the flow:

Statement (I): Forced vortex flow is rotational.

Statement (II): Flow in which fluid particles move along a circle is called a rotational flow.

The Kinetic energy correction factor is

If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, what will be the momentum correction factor?