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Hydraulics & Fluid Mechanics

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

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

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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
Flow of water in a pipe about 3 meters in diameter can be measured by

orifice plate
rotameter
pitot tube
venturi

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Hydraulics & Fluid Mechanics
The line of action of the buoyant force acts through the

center of gravity of any submerged body
centriod of the displaced volume of fluid
center of the volume of floating body
centroid of the volume of fluid vertically above the body

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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

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

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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

between 1 and 100
160
less than 1
200

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