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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

Expands
Does not change
Contracts
None of these

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Hydraulics and Fluid Mechanics in ME
The Reynold's number of a ship is __________ to its velocity and length.

Inversely proportional
Directly proportional
None of these
Square root of velocity

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Hydraulics and Fluid Mechanics in ME
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

Manometric head
Static head
Kinetic head
Velocity head

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Hydraulics and Fluid Mechanics in ME
The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm". The pressure at 2.5 m below the oil surface will be

4 m of water column
2 metres of water column
3 metres of water column
3.5 metres of water column

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

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

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Hydraulics and Fluid Mechanics in ME
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

Specific speed
Unit speed
None of these
Normal speed

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