(a) Differentiate between broad crested weir and narrow crested weir.…

Question

(a) Differentiate between broad crested weir and narrow crested weir. Find the condition for maximum discharge over a broad - crested weir.

(b) A $30\text{ cm}$ dia pipe supplies water steadily to a turbine at $1.8\text{ bar}$. The water leaves the turbine on exit side through a $60\text{ cm}$ pipe with a pressure of $0.25\text{ bar}$. A vertical distance of $1.5\text{ m}$ separate the centre of pipes at sections where measurements of pressure have been made. Calculate the power delivered to the turbine from water if $0.25\text{ m}^3\text{/s}$ of water passes through the arrangement. Neglect friction losses.