276) The discharge in an open channel corresponding to critical depth is

277) The pressure of liquid at throat in a venturimeter is __________ than that at inlet.

278) A fluid whose viscosity changes with the rate of deformation or shear strain is known as non-newtonian fluid.

279) When the flow in an open channel is gradually varied, the flow is said to be

280) When the Mach number is equal to unity, the flow is called sonic flow.