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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
The coefficient of discharge for an external mouthpiece depends upon

Pressure of liquid
Area of mouthpiece
Length of mouthpiece
Velocity of liquid

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Hydraulics and Fluid Mechanics in ME
With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

Remain unchanged
Decrease
Increase
Depend upon the characteristics of liquid

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Hydraulics and Fluid Mechanics in ME
A hydraulic accumulator normally consists of

A cylinder and a ram
Two coaxial rams and two cylinders
Two cylinders, two rams and a storage device
A cylinder, a piston, storage tank and control valve

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Hydraulics and Fluid Mechanics in ME
For a body floating in a liquid the normal pressure exerted by the liquid acts at

bottom surface of the body
all points on the surface of the body
metacentre
e.g. of the body

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Hydraulics and Fluid Mechanics in ME
Axial flow pump is started with its delivery valve

Irrespective of any position
Kept fully closed
Kept fully open
Kept 50% open

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

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

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