## Hydraulics & Fluid Mechanics The flow which neglects changes in a transverse direction is known as

steady flow
turbulent flow
one dimensional flow
uniform flow

## Hydraulics & Fluid Mechanics Two pipe systems are said to be equivalent when

head loss and discharge are same in two systems
length and diameter are same in two systems
length of pipe and discharge are same in two systems
friction factor and length are same in two systems

## Hydraulics & Fluid Mechanics In which of the following the friction drag is generally larger than pressure drag?

a sphere
a circular disc or plate held normal to flow
a cylinder
an airfoil

## Hydraulics & Fluid Mechanics For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

directly proportional to Reynolds number and independent of pipe wall roughness
inversely proportional to Reynolds number and directly proportional to pipe wall roughness
inversely proportional to Reynolds number and indpendent of pipe wall roughness
directly proportional to pipe wall roughness and independent of Reynolds number

## Hydraulics & Fluid Mechanics The line of action of the buoyant force acts through the centroid of the

displaced volume of the fluid
volume of the fluid vertically above the body
submerged body
volume of the floating body

## Hydraulics & Fluid Mechanics The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if

the area is vertical
the area is inclined
the area is horizontal
All of these