Hydraulics and Fluid Mechanics in ME
A pitot tube is used to measure the

Pressure difference between two points in a pipe
Discharge through a pipe
Total pressure of liquid flowing in a pipe
Velocity of flow at the required point in a pipe

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Hydraulics and Fluid Mechanics in ME
An orifice is said to be large, if

The velocity of flow is large
The available head of liquid is less than 5 times the height of orifice
The size of orifice is large
The available head of liquid is more than 5 times the height of orifice

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