Figure Q2 shows a venturimeter which is to be fitted in a horizontal pipe of 0075m radius and to measure a flow of water which may be anything up to 0667 cubic meter per seconds The static head at the inlet for this flow is 18m above atmospheric and the static head at the throat must not be lower than 7m below atmospheric Between the inlet and the throat there is an estimated frictional loss of 10 of the difference in static head between these points Determine the minimum allowable diameter for