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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.
H1/2
H3’2

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Hydraulics & Fluid Mechanics
In a Sutro weir, the discharge is proportional to (where H is head)

H
H5/2
H1/2
H3/2

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Hydraulics & Fluid Mechanics
Two pipe systems are said to be equivalent when

friction factor and length are same in two systems
head loss and discharge are same in two systems
length of pipe and discharge are same in two systems
length and diameter are same in two systems

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Hydraulics & Fluid Mechanics
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

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

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

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Hydraulics & Fluid Mechanics
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the

force of diffusion
force of adhesion
force of friction
force of cohesion

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