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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

7
6
1
5

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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
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

Submerged weir
Broad-crested weir
Narrow-crested weir
Ogee weir

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Hydraulics and Fluid Mechanics in ME
When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

Becomes curved
Falls on the back end
Falls on the front end
Remains horizontal

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Hydraulics and Fluid Mechanics in ME
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be

1500 kg
500 kg
1000 kg
2000 kg

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Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - nH)H2
1.84(L - nH)H3
1.84(L - 0.1nH)H5/2
1.84(L - 0.1nH)H3/2

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