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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The pressure at a point in a fluid will not be same in all the directions when the fluid is

inviscous and moving
viscous
viscous and moving.
moving

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Hydraulics and Fluid Mechanics in ME
In reaction turbine, draft tube is used

To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
For safety of turbine
To transport water downstream without eddies
To increase flow rate

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Hydraulics and Fluid Mechanics in ME
The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to

Archimedes’ principle
Bernoulli’s theorem
Buoyancy
Equilibrium of a floating body

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Hydraulics and Fluid Mechanics in ME
The shear stress between the two liquid layers is __________ proportional to the distance between two layers.

Inversely
Both A and B
None of these
Directly

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Hydraulics and Fluid Mechanics in ME
The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

Decreases
Increases
Remain same
None of these

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Hydraulics and Fluid Mechanics in ME
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)

(W/p) × (a/A)
(p/W) × (A/a)
(p/W) × (a/A)
(W/p) × (A/a)

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