41. Carbon percentage in medium carbon steel is around
42. Addition of nickel to copper improves its
43. __________ is not a case hardening process.
44. Gunmetal and bronze are not corroded by the action of
45. Glass lined vessels are not used for handling/storing
46. Pick the odd man out of the following.
47. For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
48. Percentage of silver in German silver is
49. Sulphuric acid pickling tanks are lined with
50. __________ iron is produced, when molten pig iron is chilled suddenly.
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