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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Ay between two stream lines represents

velocity
head
pressure
discharge

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Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

maximum at the pipe wall
zero at the pipe wall
None of these
independent of shear stress

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Hydraulics & Fluid Mechanics
If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

200
less than 1
between 1 and 100
160

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Hydraulics & Fluid Mechanics
A fluid is said to be ideal, if it is

inviscous and incompressible
inviscous
inviscous and compressible
incompressible

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Hydraulics & Fluid Mechanics
When a body floating in a liquid, is displaced slightly, it oscillates about

center of pressure
center of buoyancy
e.g. of body
metacentre

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Hydraulics & Fluid Mechanics
An open vessel of water is accelerated up an inclined plane. The free water surface will

be horizontal
any one of above is possible
make an angle in direction of inclination of inclined plane
make an angle in opposite direction to inclination of inclined plane

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