A convergent-divergent mouthpiece is fitted into the vertical side of a tank containing water. Assumming that there are no losses in the convergent part of the mouthpiece, and that the losses in the...

A convergent-divergent mouthpiece is fitted into the vertical side of a tank containing water. Assumming that there are no losses in the convergent part of the mouthpiece, and that the losses in the divergent part are equivalent to 0.2 times the velocity head at exit and that the maximum absolute pressure head at the throat is 2.44 m of water for a barometric pressure of 760 mm of mercury, determine the throat and exit diameters of the mouthpiece when the discharge is 4.25 lit./sec. for a head of 1.52 metres.