Hydraulics and Fluid Mechanics in ME
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be

from reservoir B to reservoirs C and A
from reservoir A to reservoirs B and C
unpredictable
from reservoir C to reservoirs A and B

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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 ?

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

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Hydraulics and Fluid Mechanics in ME
Cavitation will begin when

the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
pressure becomes more than critical pressure
pressure is increased
flow is increased

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Hydraulics and Fluid Mechanics in ME
The depth of centre of pressure (h) for a vertically immersed surface from the liquid surface is given by (where IG = Moment of inertia of the immersed surface about horizontal axis through its centre of gravity, A = Area of immersed surface, and x = Depth of centre of gravity of the immersed surface from the liquid surface)

(IG/x̅) - Ax̅
(IG/Ax̅) - x̅
(IG/Ax̅) + x̅
(Ax̅/IG) + x̅

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