A centrifugal pump having an internal and external diameter of impeller 150 mm and 450 mm, respectively, is running at 1,000 rpm. It has a constant velocity of flow of 5 m/sec and discharges through the pump is 0.04 m3/sec. The diameters of suction and delivery pipes are 100 and 80 mm, respectively and suction and delivery heads are 8 and 20 m of water, respectively. If outlet vane angle is 300 and power required to drive the pump is 18 kW.

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Asphalt Binders and Mixtures

Asphalt binders are subsidiary products procured during the refining process of petroleum while manufacturing gasoline, diesel, and similar petroleum products. Asphalt binders are obtained from the residue that remains after the distillation of petroleum, this residue is further subjected to steam distillation and oxidation to remove the traces of gas oil present in the residue. Certain additives or modifiers are also added to asphalt binders to alter them to suit different applications.