Q27 : A rectangular sedimentation tank use to treat 1.5 ML/d of raw water. Assume the detention time 4h ,L/B= 3 and the depth of tank 2m. The horizontal velocity is: Select one: а. 4.8 m/h b. 1.48 m/h С. 2.5 m/h d. 0.48 m/h

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.