Hydraulics and Fluid Mechanics in ME
The hydraulic grade line is

never above the energy grade line
All of these
always above the centre line of pipe
always sloping downward in the direction of flow

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Hydraulics and Fluid Mechanics in ME
A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

cannot be predicted from the given data
zero
one-half its value when cylinder was full
one-fourth its value when cylinder was full

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