31. Blast furnace produces following by reduction of iron ore
Correct answer: (B)
pig iron
32. Brass (alloy of copper and zinc) is an example of
Correct answer: (A)
substitutional solid solution
33. Brass contains
Correct answer: (A)
70% copper and 30% zinc
34. Bronze contains
Correct answer: (B)
90% copper and 10% tin
35. By severely deforming a metal in a particular direction it becomes
Correct answer: (E)
anisotropic.
36. Carbon in iron is an example of
Correct answer: (B)
interstitial solid solution
37. Carbon steel is
Correct answer: (C)
an alloy of iron and carbon with varying quantities of phosphorus and sulphur
38. Cast iron has
Correct answer: (B)
its elastic limit close to the ultimate breaking strength
39. Cast iron is characterised by minimum of following %age of carbon
Correct answer: (AXDXXXXA)
2%
40. Cemented carbide tools are not found to be suitable for cutting
Correct answer: (D)
steel