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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The discharge through a V- notch varies as

H5/2
H5’4 where H is head.
H3’2
H1/2

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

None of these
SAME AS BUOYANT FORCE
ZERO
NEGLIGIBLE

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Hydraulics & Fluid Mechanics
Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(ii) and (iii)
(i) and (ii)
(i), (ii) and (iii)
(i) and (iii)

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

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

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Hydraulics & Fluid Mechanics
A perfect gas

has constant viscosity
None of these
is of theoretical interest
is incompressible

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Hydraulics & Fluid Mechanics
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

600
675
337.5
300

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