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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
When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is

ω².r²/4g
ω.r/2g
ω.r/4g
ω².r²/2g

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Hydraulics and Fluid Mechanics in ME
Delivery head of a centrifugal pump is

Directly proportional to N²
Inversely proportional to N
Inversely proportional to N²
Directly proportional to N

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Hydraulics and Fluid Mechanics in ME
The discharge through a siphon spillway is

Cd × a × √(2gH)
Cd × a × √(2g) × H3/2
Cd × a × √(2g) × H5/2
Cd × a × √(2g) × H2

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Hydraulics and Fluid Mechanics in ME
Newton’s law of viscosity relates

shear stress and rate of angular deformation
intensity of pressure and rate of angular deformation
shear stress, viscosity and temperature
viscosity and rate of angular deformation

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Hydraulics and Fluid Mechanics in ME
A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is

27,000 kg
13,500 kg
18,000 kg
9,000 kg

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