287) When the Mach number is more than 6, the flow is called

288) The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.

289) The separation of flow occurs when the hydrodynamic boundary layer thickness is reduced to zero.

290) If the depth of water in an open channel is less than the critical depth, the flow is called

291) A nozzle placed at the end of a water pipe line discharges water at a