Fluid Mechanics
Very small pressure difference (< 5 mm water coloumn) can be most conveniently measured by a/an __________ manometer.

U-tube water
U-tube mercury
Inclined tube mercury
Inclined tube water

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Fluid Mechanics
A differential pressure cell is used for

Measuring the difference of the impact & the static pressure
Measuring small pressure difference in liquids
Remote recording of pressure difference
Measuring small pressure difference in gases

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