The apparatus consists of two pipelines emerging out from a common manifold. One pipe line contain a Venturimeter and other contains an Orifice. The pressure tapings from the Venturimeter and orifice meter are taken to differential manometer to measure pressure difference. The Venturimeter and Orificemeter are connected in parallel and any one of them can be put in operation by operating valves provided at the downstream. The flow can also be regulated by these valves. The set-up can be connected to Hydraulic Bench with flexible pipe line.
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