<div style='margin-bottom: 20px;'> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How do ferrous metals differ from non-ferrous metals in terms of their base element?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Ferrous metals are primarily made of iron, while non-ferrous metals do not contain iron.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the primary purpose of identifying and understanding the properties of engineering materials?</h2> <p style="font-weight: normal; font-size: 1.2rem;">To select the suitable material for the desired end product or articles.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What role does carbon play in the properties of steel?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Carbon increases the hardness and strength of steel.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">Why is pig iron significant in the production of other ferrous metals?</h2> <p style="font-weight: normal; font-size: 1.2rem;">It acts as the raw material for the production of other ferrous metals such as cast iron and steel.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What distinguishes high carbon steel from low and medium carbon steel?</h2> <p style="font-weight: normal; font-size: 1.2rem;">High carbon steel has the highest brittleness and strength due to its higher carbon content.</p> </div> </div>