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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
Dimensions of surface tension are

ML r²
ML°T
ML²T²
ML°T⁻²

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Hydraulics and Fluid Mechanics in ME
The total energy line lies over the centre line of the pipe by an amount equal to

Pressure head - velocity head
Pressure head
Velocity head
Pressure head + velocity head

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Hydraulics and Fluid Mechanics in ME
Surge wave in a rectangular channel is an example ofi) steady flowii) unsteady flowiii) uniform flowiv) non-uniform flowThe correct answer is

(ii) and (iv)
(i) and (iii)
(i) and (iv)
(ii) and (iii)

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Hydraulics and Fluid Mechanics in ME
An air vessel is provided at the summit in a siphon to

Avoid interruption in the flow
Increase velocity
Increase discharge
Maintain pressure difference

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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
Pelton wheel with two or more nozzles
Kaplan turbine
Francis turbine

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Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

All of these
always above the centre line of pipe
always sloping downward in the direction of flow
never above the energy grade line

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