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Hydraulics and Fluid Mechanics in ME

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

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

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Hydraulics and Fluid Mechanics in ME
The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is _______ of the jet velocity,

Three-fourth
One-fourth
One-half
Double

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Hydraulics and Fluid Mechanics in ME
The body will float if the force of buoyancy is ___ the weight of the liquid displaced.

Less than
More than
Equal to
None of the listed here

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Hydraulics and Fluid Mechanics in ME
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

[(Vr - v) v]/ Vr
[2(Vr - v) v]/ Vr²
[(Vr + v) v]/ Vr
[2(Vr + v) v]/ Vr²

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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
Pascal’s law
D-Alembert’s principle
Archimedes’s principle

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Hydraulics and Fluid Mechanics in ME
An impulse turbine is used for

High discharge
High head of water
Medium head of water
Low head of water

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