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Hydraulics and Fluid Mechanics in ME

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

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Hydraulics and Fluid Mechanics in ME
In a depressed nappe

The pressure below the nappe is atmospheric
The pressure below the nappe is negative
The pressure above the nappe is negative
The pressure above the nappe is atmospheric

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

1/2 × depth
1/2 × sloping side
1/2 × breadth
1/4 × (depth + breadth)

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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

0.4
0.8
0.5
0.6

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Hydraulics and Fluid Mechanics in ME
Re-entrant or Borda's mouthpiece is an __________ mouthpiece.

External
Both A and B
None of these
Internal

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Hydraulics and Fluid Mechanics in ME
To avoid an interruption in the flow of a siphon, an air vessel is provided

At the summit
At the outlet
At the inlet
At any point between inlet and outlet

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