A 15 cm diameter pipe carries a flow of 70 litres per second of an oil (sp.gr = 0.75). At a section %3D 12 cm above the datum, there is vacuum of 2 cm of mercury. If the kinetic energy correction factor for this section is 1.1 the total head at the section of oil is:

A suspended gate that’s able to pivot from the top seperates two liquids. There is a stopper that prevents the gate opening anti-clockwise. The gate has a height of 0.5m. The liquid on the right is three times as dense as the liquid on the left. The liquid on the left has a depth of 0.3m. 1) What is the minimum depth of liquid on the right for the gate to open. 2) Comment on the ability to solve this question if the liquid on the left was 0.5m (filled to the top)

A 25-mm-diameter pipe 35m long is used to convey oil. The oil has a density of 880kg/m³ and a kinematic viscosity of 0.25×10*m³/s. The discharge in the pipe is Q=24x10*m³/min. Given that the pipe is placed horizontally and there are no any minor losses. Determine the pressure drop between the entrance and exit of pipe.