In order to maximize the service life of an ion exchange unit, Select all that are True. *Iron, manganese, or the combination of the two should not exceed 3.0 mg/L in the water applied to the resin. *Turbidity should not exceed 1 NTU. *The water should not be prechlorinated. *Turbidity should not exceed 5 NTU.

Q: Which type of hardness can be removed by Reverse Osmosis method (RO)

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Q: ________with high liquid limits have high or very high dry strength and high toughness.

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Q: Vulcanization a. Breaks long polymer chains into shorter ones b. Crosslinks polymer chains to…

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Q: 14.2 lb/in2 --------> lb/ft2

A: Given a pressure value of 14.2 in lb/in2. This has to be converted into lb/ft2.

Q: The yield strength for an alloy that has an average grain diameter of 4.4 × 10-2 mm is 133 MPa. At a…

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Q: 3 Induction hardening and flame hardening are two heat treatment methods that can be used to…

A: Option A) is correct  Induction hardening uses an electric current to very rapidly generate heat via…

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.