Best Answer: Venturies and Orifice plates are widely used in industries to measure the flow rate of gases and liquids. The working principle is simple and flow is measured using the differential pressure principle.Even for a wind to blow, there has to be a low pressure and a high pressure.eport Abuse. Venturi meters are used to measure the speed of a fluid's flow through a pipe. I don't know about in cars, but I think an important industrial application would be to monitor the flow rates of chemicals through the pipes of a chemical plant.