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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The critical depth meter is used to measure

Velocity of flow in an open channel
Depth of channel
Hydraulic jump
Depth of flow in an open channel

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Hydraulics and Fluid Mechanics in ME
The power transmitted through the pipe is maximum when the head lost due to friction is equal to

One-third of the total supply head
One-half of the total supply head
Two-third of the total supply head
One-fourth of the total supply head

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Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

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

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Hydraulics and Fluid Mechanics in ME
The ratio of absolute viscosity to mass density is known as

coefficient of viscosity
viscosity index
kinematic viscosity
specific viscosity

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Hydraulics and Fluid Mechanics in ME
The depth ā€˜d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)

0.707 D
0.423 D
0.223 D
0.577 D

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

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

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