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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Rain drops are spherical because of

atmospheric pressure
air resistance
surface tension forces
viscosity

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Hydraulics and Fluid Mechanics in ME
In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

None of these
More than
Less than
Equal to

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Hydraulics and Fluid Mechanics in ME
A channel is said to be of most economical cross-section, if

It involves lesser excavation for the designed amount of discharge
It has minimum wetted perimeter
All of these
It gives maximum discharge for a given cross-sectional area and bed slope

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Hydraulics and Fluid Mechanics in ME
A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is

400 kg/cm²
4000 kg/cm²
40 × 10⁵ kg/cm²
40 × 10⁶ kg/cm²

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Hydraulics and Fluid Mechanics in ME
Rotameter is a device used to measure

velocity of fluid
absolute pressure
rotation
flow

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Hydraulics and Fluid Mechanics in ME
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be

12 kN/m2
10 kN/m2
14 kN/m2
4 kN/m2

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