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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is (where R is the radius of pipe)

1/3 R
3/4 R
1/2 R
2/3 R

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Hydraulics & Fluid Mechanics
A perfect gas

is incompressible
is of theoretical interest
None of these
has constant viscosity

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

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

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Hydraulics & Fluid Mechanics
The region between the separation streamline and the boundary surface of the solid body is known as

wake
drag
lift
boundary layer

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

one dimensional flow
steady flow
turbulent flow
uniform flow

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Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

40 M/SEC
50 M/SEC
33 M/SEC
22.5 M/SEC

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