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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

First rise and then fall
Horizontal
Nearly horizontal
Steep

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Hydraulics and Fluid Mechanics in ME
The discharge through a reaction turbine with increase in unit speed

First increases and then decreases
Remain unaffected
Decreases
Increases

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Hydraulics and Fluid Mechanics in ME
Viscosity of water in comparison to mercury is

Same
Higher
Lower
Higher/lower depending on temperature

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Hydraulics and Fluid Mechanics in ME
The specific weight of water in S.I. units is taken as

9.81 kN/m3
Any one of these
9.81 × 10-6 N/mm3
9.81 × 103 N/m3

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Hydraulics and Fluid Mechanics in ME
The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

w
wh
h/w
w/h

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Hydraulics and Fluid Mechanics in ME
The process of diffusion of one liquid into the other through a semi-permeable membrane is called

cohesion
viscosity
surface tension
osmosis

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