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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The unit of surface tension is

N/m2
N/m
N/m3
N-m

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Hydraulics and Fluid Mechanics in ME
The two important forces for a floating body are

buoyancy, inertial
inertial, gravity
buoyancy, gravity
buoyancy, pressure

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Hydraulics and Fluid Mechanics in ME
Liquids

Cannot be compressed
Are not affected by change in pressure and temperature
None of the listed here
Occupy definite volume

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Hydraulics and Fluid Mechanics in ME
Low specific speed of a pump implies it is

None of these
Mixed flow pump
Axial flow pump
Centrifugal pump

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Hydraulics and Fluid Mechanics in ME
Braking jet in an impulse turbine is used

To bring the runner to rest in a short time
None of these
To change the direction of runner
To break the jet of water

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Hydraulics and Fluid Mechanics in ME
The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch)

(2/3) Cd × b × √(2gH)
(2/3) Cd × b × √(2g) × H3/2
(2/3) Cd × b × √(2g) × H2
(2/3) Cd × b × √(2g) × H

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