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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

2V/(vr - v)
2V/(vr + v)
V/(vr + v)
V/(vr - v)

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Hydraulics and Fluid Mechanics in ME
In an isothermal atmosphere, the pressure

decreases linearly with elevation
remains constant
increases exponentially with elevation
varies in the same way as the density

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

AC × √(m × i)
mi × √(A × C)
C × √(m × i)
A × √(m × i)

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Hydraulics and Fluid Mechanics in ME
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

H = Hg + hf
H = Hg - hf
H = Hg × hf
H = Hg/hf

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

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

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Hydraulics and Fluid Mechanics in ME
A structure, whose width is __________ the width of the channel, is called a flumed structure.

Less than
Equal
More than
None of these

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