31. Lead lined equipments & vessels are suitable for handling
32. 'Semi steel' is
33. Carbon supply in pack carburising process is in the form of
34. Thermoplastic resins are those polymers, which
35. Most common stainless steel type 316, which is highly resistant to corrosion contains
36. Spark plugs are made of
37. Which of the following commercial metals is most abundantly found in India?
38. Maximum carbon content in cast iron is __________ percent.
39. Out of the following, copper vessels are the most suitable for the storage of
40. Stainless steel contains
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