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

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

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Hydraulics and Fluid Mechanics in ME
Meta-centric height is given as the distance between

The center of gravity of the body and the metacenter
The center of gravity of the body and the center of pressure
The center of gravity of the body and the center of buoyancy
Center of buoyancy and metacenter

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