Online Chemical Engineering Test - Fluid Mechanics Test 1

The head loss in turbulent flow in a pipe varies

The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10^-6m²/s).

For the free settling of a spherical particle through a fluid, the slope of, C_D-log N_Re , plot is

Hydraulic intensifier is used for increasing the

Pick out the Kozney-Karman equation (valid for low N_Re) for fluid flow through a packed bed of solids.

Transition length for a turbulent fluid entering into a pipe is around __________ times the pipe diameter.

Pascal's law is valid, only when the fluid is

One dimensional fluid flow implies the

The discharge through a venturimeter depends upon

Gradually varied flow in open channel is a/an __________ flow.

The pressure and power requirement of a gas fan at constant speed & capacity varies __________ the gas density.

At low Reynolds number

Buckingham-π theorem states that in any physical problem including 'n' quantities having 'm' diamensions, the quantities can be arranged into __________ independent dimensionless parameters.

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).

What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate ?

If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor).

Hydraulic mean radius for flow through packed bed of spherical particle of size, 'D_p, with porosity 'ε' is

A gas

Slugging occurs in a fluidised bed, if the bed is

The Reynolds number for an ideal fluid flow is