DieselShip's Online Content Library

Q7. The flow rate of lubricating oil to an engine is measured using a vertical venturi meter.

The venturi meter has an inlet diameter of 150 mm and the throat, which is 200 mm above the inlet, has a diameter of 100 mm.

A differential pressure gauge connected to the inlet and throat gives a reading of 5 kN/m².

The venturi has a coefficient of discharge of 0. 95 and the relative density of the oil is 0.8².

Calculate EACH of the following:

(a) the net increase in kinetic energy for 1 kg of oil; (8)

(b) the velocity of the oil at the venturi meter inlet; (5)

(c) the mass flow rate of oil in tonne per hour. (3)