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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For manometer, a better liquid combination is one having

lower surface tension
high density and viscosity
surface tension is no criterion
higher surface tension

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Hydraulics and Fluid Mechanics in ME
The center of gravity of the volume of the liquid displaced by an immersed body is called

metacentre
center of buoyancy
center of gravity
center of pressure

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Hydraulics and Fluid Mechanics in ME
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

Equal to
More than
None of these
Less than

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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

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

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Hydraulics and Fluid Mechanics in ME
The total energy line lies over the hydraulic gradient line by an amount equal to the

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

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Hydraulics and Fluid Mechanics in ME
A flow is called super-sonic if the

None of these
Discharge is difficult to measure
Mach number is between 1 and 6
Velocity of flow is very high

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