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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

Twice the depth
Half the breadth
Twice the breadth
Half the depth

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Hydraulics and Fluid Mechanics in ME
The centre of pressure acts __________ the centre of gravity of immersed surface.

None of these
At
Above
Below

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Hydraulics and Fluid Mechanics in ME
The highest efficiency is obtained with a channel of __________ section.

Rectangular
Square
Circular
Trapezoidal

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Hydraulics and Fluid Mechanics in ME
If no resistance is encountered by displacement, such a substance is known as

Ideal fluid
Gas
Fluid
Water

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

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

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Hydraulics and Fluid Mechanics in ME
Geometric similarity is said to exist between the model and the prototype, if both of them

Are equal in size and shape
Have identical forces
Have identical velocities
Are identical in shape, but differ only in size

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