Hydraulics and Fluid Mechanics in ME
Alcohol is used in manometers because

It has low surface tension
It is clearly visible
It has low vapour pressure
It can provide longer column due to low density

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Hydraulics and Fluid Mechanics in ME
The total head of a liquid particle in motion is equal to

Pressure head + kinetic head + potential head
Pressure head - (kinetic head + potential head)
Potential head - (pressure head + kinetic head)
Kinetic head - (pressure head + potential head)

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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

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

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