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

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

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Hydraulics and Fluid Mechanics in ME
Coefficient of resistance is the ratio of

Area of jet at vena-contracta to the area of orifice
Loss of head in the orifice to the head of water available at the exit of the orifice
Actual discharge through an orifice to the theoretical discharge
Actual velocity of jet at vena-contracta to the theoretical velocity

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Hydraulics and Fluid Mechanics in ME
A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, theni) the ball will move to the frontii) the bubble will move to the frontiii) the ball will move to the reariv) the bubble will move to the rear Find out which of the above statements are correct ?

(ii) and (iii)
(iii) and (iv)
(i) and (ii)
(i) and (iv)

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