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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific speed
specific volume
specific gravity
specific weight

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Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.95
1.01
0.611
0.86

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Hydraulics & Fluid Mechanics
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is

at the centroid of the submerged area
always above the centroid of the area
always below the centroid of the area
None of these

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

2 H/3
H/3
H/2
2 H/5

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Hydraulics & Fluid Mechanics
A large Roynold number is indication of

turbulent flow
highly turbulent flow.
smooth and streamline flow
LAMINAR FLOW

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

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