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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

wH2/4
wH2/2
wH/2
wH

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Hydraulics and Fluid Mechanics in ME
Low specific speed of turbine implies it is

Impulse turbine
Francis turbine
Any one of the above
Propeller turbine

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Hydraulics and Fluid Mechanics in ME
Which of the following is not a reaction turbine?

Journal turbine
Fourneyron turbine
Pelton wheel
Thomson's turbine

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Hydraulics and Fluid Mechanics in ME
In order to avoid cavitation in centrifugal pumps

The suction pressure should be high
The delivery pressure should be high
The suction pressure should be low
The delivery pressure should be low

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

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

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Hydraulics and Fluid Mechanics in ME
The depth ā€˜d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.707 D
0.423 D
0.223 D
0.577 D

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