339) The centre of pressure acts __________ the centre of gravity of immersed surface.

340) A flow through an expanding tube at constant rate is called

341) When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.

342) The velocity of flow is same at all points in the cross-section of a channel.

343) The length of a liquid stream while flowing over a weir __________ at the ends of the sill.