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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The process of diffusion of one liquid into the other through a semi-permeable membrane is called

surface tension
osmosis
cohesion
viscosity

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump is

None of these
Proportional to speed of impeller
Proportional to diameter of impeller
Proportional to diameter and speed of impeller

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Hydraulics and Fluid Mechanics in ME
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

0.8
0.5
0.4
0.6

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

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Hydraulics and Fluid Mechanics in ME
The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

(q/g)1/2
(q³/g)1/4
(q⁴/g)1/5
(q²/g)1/3

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Hydraulics and Fluid Mechanics in ME
A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

Pelton wheel with one nozzle
Francis turbine
Pelton wheel with two or more nozzles
Kaplan turbine

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