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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Hydrometer is used to determine

relative humidity
specific gravity of liquids
specific gravity of solids
specific gravity of gases

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Hydraulics and Fluid Mechanics in ME
In a Francis turbine runner, the numbers of blades are generally between

16 to 24
4 to 8
8 to 16
2 to 4

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Hydraulics and Fluid Mechanics in ME
Centrifugal pump is started with its delivery valve

Irrespective of any position
Kept fully closed
Kept 50% open
Kept fully open

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Hydraulics and Fluid Mechanics in ME
Centre of buoyancy always

remains below the centre of gravity
coincides with the centroid of the volume of fluid displaced
coincides with the centre of gravity
remains above the centre of gravity

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Hydraulics and Fluid Mechanics in ME
Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by

0.15
0.05
0.1
0.2

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Hydraulics and Fluid Mechanics in ME
When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

Absolute pressure
Positive gauge pressure
Vacuum pressure
Gauge pressure

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