Fluid Mechanics
The most suitable flow measuring device for the fluid flow measurement in a very large diameter pipeline is a

Kennison nozzle
Pitot tube
Weir
V-notch

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Fluid Mechanics
Steady flow occurs, when the

Conditions change steadily with time
Rate of the velocity change is constant
Conditions do not change with time at any point
Conditions are the same at the adjacent points at any instant

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