Hydraulics and Fluid Mechanics in ME
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the Centroid, if

The area is vertical
The area is horizontal
The area is inclined
All of these

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Hydraulics and Fluid Mechanics in ME
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be

from reservoir B to reservoirs C and A
from reservoir A to reservoirs B and C
unpredictable
from reservoir C to reservoirs A and B

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be uniform when

The liquid particles at different sections have different velocities
Each liquid particle has a definite path
The liquid particles at all sections have the same velocities
The quantity of liquid flowing per second is constant

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