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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The Prartdtl mixing length is

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

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Hydraulics & Fluid Mechanics
Separation of flow occurs when

the cross-section of a channel is reduced
All of these
the boundary layer comes to rest
the pressure intensity reaches a minimum

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Hydraulics & Fluid Mechanics
The increase in meta centric height i) increases stability ii) decreases stability iii) increases comfort for passengers iv) decreases comfort for passengers The correct answer is

(i) and (iv)
(ii) and (iii)
(ii) and (iv)
(i) and (iii)

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Hydraulics & Fluid Mechanics
When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies

inversely as the square of the radial distance
inversely as the radial distance
linearly with radial distance
as the square of the radial distance

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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

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

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

SAME AS BUOYANT FORCE
None of these
NEGLIGIBLE
ZERO

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