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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Specific weight of water in S.I. units is equal to

9.81 xlO6 N/m3
10000 N/m3
1000 N/m3
9.81 xlO3 N/m3

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Hydraulics and Fluid Mechanics in ME
The atmospheric pressure with rise in altitude decreases

linearly
first steeply and then gradually
first slowly and then steeply
unpredictable

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Hydraulics and Fluid Mechanics in ME
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)

wH2/2
wH/2
wH2/3
wH

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Hydraulics and Fluid Mechanics in ME
An ideal flow of any fluid must satisfy

Newton’s law of viscosity
Pascal law
boundary layer theory
continuity equation

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Hydraulics and Fluid Mechanics in ME
The number of buckets on the periphery of a Pelton wheel is given by

(D/2d) + 10
(D/2d) + 15
(D/2d) + 5
(D/2d) + 20

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Hydraulics and Fluid Mechanics in ME
The buoyancy depends on

viscosity of the liquid
depth of immersion
pressure of the liquid displaced
mass of liquid displaced

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