Pipe Flow, Pumps and Flow Measurement - Fluid Mechanics and Mechanical Operations - Chemical Engineering Previous Year Questions

The pressure differential across a venturimeter, inclined at 45° to the vertical (as shown in the figure) is measured with the help of a manometer to estimate the flowrate of a fluid flowing through it. If the density of the flowing fluid is ρ and the density of the manometer fluid is ρm, the velocity of the fluid at the throat can be obtained from the expression

The volumetric flow rate (in L/s) of water at the discharge is

Under fully turbulent flow conditions, the frictional pressure drop across a packed bed varies with the superficial velocity (V) of the fluid as

A storage vessel exposed to atmosphere (absolute pressure = 10.3 m of water) has a diameter of 3 m and is initially filled with water to a height of 2 m. The pump draws water from the vessel and is located at an elevation of 5 m above the bottom of the vessel. The frictional head loss in the suction pipe is 2 m of water. If the vapour pressure of the liquid at the temperature of operation is 3 m of water, then the available NPSH is

In Hagen-Poiseuille flow through a cylindrical tube, the radial profile of shear stress is

In an orifice meter, if the pressure drop across the orifice is overestimated by 5%, then the PERCENTAGE error in the measured flow rate is

A liquid is flowing through the following piping network. The length of pipe sections P, Q, R and S shown in the schematic are equal. The diameters of the sections P and R are equal and the diameter of the section Q is twice that of S. The flow is steady and laminar. Neglecting curvature and entrance effects, the ratio of the volumetric flow rate in the pipe section Q to that in S is

The local velocity of a fluid along a streamline can be measured by

For a Newtonian fluid flowing in a circular pipe under steady state conditions in fully developed laminar flow, the Fanning friction factor is