Q1: Basic open hearth furnace (BOF) is not used for producing __________ steel.

ANS:C - high alloy

Basic open hearth furnaces (BOF) are not typically used for producing high alloy steel. Basic open hearth furnaces, also known as basic oxygen furnaces (BOF), are primarily used for producing carbon and low-alloy steels. These furnaces are well-suited for refining molten iron into steel by blowing oxygen through the molten metal, which oxidizes impurities and helps control the composition and properties of the steel. High-alloy steels, on the other hand, typically require more precise control over composition and metallurgical processes than what is provided by basic open hearth furnaces. Instead, high-alloy steels are commonly produced using electric arc furnaces (EAF) or other specialized processes that offer greater flexibility and control over alloying elements and processing parameters. Therefore, basic open hearth furnaces are not typically used for producing high-alloy steels.