Which of the Following Is NOT Associated with the Production

question 86

Multiple Choice

Which of the following is NOT associated with the production of iron from iron ore in blast furnaces?

• A)Iron ore, coke, and limestone are used.
• B)Solid by-products collect on top of molten iron, which is removed from the bottom of the reaction vessel.
• C)Molten iron crystallizes at its melting point of 1538C in a bcc structure but then undergoes a phase transition at around 1390C to an fcc structure.
• D)Limestone (CaCO₃) decomposes to form lime (Ca
• O), which can react with silica impurities (SiO₂) in the iron ore.
• E)The carbon content is reduced by heating the impure molten iron in a second furnace to temperatures above 1600C.

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Definitions:

Diseconomies of Scale

An economic concept where an increase in production leads to a rise in average costs per unit due to inefficiencies.

Economies of Scale

Cost advantages that a business can achieve by increasing the scale of production, leading to lower average costs per unit due to spread fixed costs and operational efficiencies.

Cycle Inventory

The portion of inventory that a company rotates in and out of stock as part of its normal business operations, reflecting the frequency of production and ordering cycles.

Objective Lenses

The lenses on a microscope closest to the specimen, responsible for magnifying the image.