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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

Half the breadth
Twice the breadth
Half the depth
Twice the depth

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Hydraulics and Fluid Mechanics in ME
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

dependent on relative roughness only
a function of Reynolds number and relative roughness
dependent only on Reynolds number
constant

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Hydraulics and Fluid Mechanics in ME
The maximum number of jets generally employed in impulse turbine without jet interference is

6
8
4
12

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Hydraulics and Fluid Mechanics in ME
The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

High speed with mixed flow at outlet
High speed with radial flow at outlet
Medium speed with radial flow at outlet
Slow speed with radial flow at outlet

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Hydraulics and Fluid Mechanics in ME
A flow in which the viscosity of fluid is dominating over the inertia force is called

Steady flow
Laminar flow
Turbulent flow
Unsteady flow

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Hydraulics and Fluid Mechanics in ME
A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

None of these
Archimedes’s principle
D-Alembert’s principle
Pascal’s law

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