In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?

A. meta center should be above e.g.
B. center of buoyancy and e.g. must lie on same vertical plane
C. a righting couple should be formed
D. all of the above
E. none of the above

A. one dimensional flow
B. uniform flow
C. steady flow
D. turbulent flow
E. streamline flow

A. when its meatcentric height is zero
B. when the metancentre is above e.g
C. when its e.g. is below it’s center of buoyancy
D. metacentre has nothing to do with position of e.g. for determining stability
E. none of the above