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Hydraulics & Fluid Mechanics

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/2
H/3
2 H/5

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Hydraulics & Fluid Mechanics
THEE HORIZONTAL COMPONENT OF BUOYANT FORCE IS

ZERO
NEGLIGIBLE
None of these
SAME AS BUOYANT FORCE

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

H1/2
H5/2
H5’4 where H is head.
H3’2

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

uniform flow
frictionless flow
incompressible flow
steady flow

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Hydraulics & Fluid Mechanics
Free surface of a liquid tends to contract to the smallest possible area due to force of

cohesion
surface tension
viscosity
friction

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Hydraulics & Fluid Mechanics
Least possible value of correction factor for i) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are

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

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