Q4: Multiple Choice Question (MCQ) (25 Mark) 1. contains up to 4-5% carbon, with small amounts of other impurities like sulfur, magnesium, phosphorus, and manganese A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 2. D. Steel is used for porch railings, fencing, farm implements, nails, barbed wire, chains, modern household furniture, ornaments and decorations. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron D. Steel 3. (carbon content up to 0.30 percent. A. Low-carbon steel B. Medium-Carbon Steel C. High-Carbon Steel 4. is an iron alloy with very low carbon content (less than 0.08%). A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 5. D. Steel is used for the manufacture of drills, taps, dies, springs, and other machine tools and hand tools. A.Low-carbon steel B. Wrought iron C.High-Carbon Steel D.Cast iron E.Medium-Carbon Steel 6. -- (Carbon Content Ranging From .50% To .90%) A. Low-carbon steel B. Medium-Carbon Steel C. High-Carbon Steel 7. is used for water pipes, machine tool castings, transmission housing, engine blocks, pistons and stove castings. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 8. D. Steel has a Brinell hardness number of 150 to 220 (no alloys) and 300 to 600 (alloyed) A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 9. D. Steel is used to make nails, rivets, gears, structural steel, desks, hoods, fenders, chisels and hammers. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron D. Steel 10. (Carbon Content Ranging From .30% To .50%) A. Low-carbon steel B. Medium-Carbon Steel C. High-Carbon Steel 11. A. Wrought iron 12. is used for Aerospace, turbine blades and jet, rocket engines and nuclear reactors. A.Stainless Steel B.High-Carbon Steel C.Cast iron D.Super alloys is made alloy of iron, carbon, and silicon. Total carbon content is between 1.7 -4.5%. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron has Brinell hardness number of 105 13. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 14. D. Steel D. Steel D. Steel is one of the ferrous metals that carbon content is from 0.03 to 1.7 percent. A. Pig Iron (Iron Ore) B. Wrought iron C. Cast iron 15. is used for general machining and forging of parts that require surface hardness and strength. A.Low-carbon steel B. Wrought iron 16. C.High-Carbon Steel D.Cast iron E.Medium-Carbon Steel 5 cannot be hardened by usual heat treatment methods and are non-magnetic. A. Austenite B. Ferrite C. Cementite D. Pearlite