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

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

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Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

Gravitational force is equal to the up-thrust of the liquid
Gravitational force is more than the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid
None of these

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Hydraulics and Fluid Mechanics in ME
When an ideal fluid flows past a sphere

total drag is zero
lowest pressure intensity occurs at rear stagnation point
highest intensity of pressure occurs around the circumference at right angles to flow
lowest pressure intensity occurs at front stagnation point

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