HYDRAULICS & FLUID MECHANICS QUIZ

The flow which neglects changes in a transverse direction is known as

turbulent flow

uniform flow

one dimensional flow

steady flow

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THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.95

0.611

0.86

1.01

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A perfect gas

is of theoretical interest

is incompressible

None of these

has constant viscosity

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The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)

2 H/5

H/2

2 H/3

H/3

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The discharge through a V- notch varies as

H1/2

H3’2

H5’4 where H is head.

H5/2

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The region between the separation streamline and the boundary surface of the solid body is known as

drag

lift

boundary layer

wake

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For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be

300

337.5

675

600

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According to Bernoulli’s equation for steady ideal fluid flow

the energy is constant along a stream-line but may vary across streamlines

velocity and pressure are inversely proportional

principle of conservation of mass holds

total energy is constant throughout

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Uniform flow occurs when

the flow is steady

the flow is streamline

size and shape of the cross section in a particular length remain constant

size and cross section change uniformly along length

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The density of water is 1000 kg/m3 at

0°C

20°C

4°C

0°K

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