Hydraulics and Fluid Mechanics in ME
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

π w ω² r²/2g
π w ω² r³/4g
π w ω² r²/4g
π w ω² r⁴/4g

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Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Loss of head and velocity of flow in both the pipes is same
Length of both the pipes is same
Diameter of both the pipes is same
Loss of head and discharge of both the pipes is same

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