31. Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its
32. Maximum permissible sulphur content in steel is __________ percent.
33. Carbon content in steel is __________ percent.
34. Carbon content in plain carbon steel is __________ percent.
35. Constantan used in thermocouples is an alloy of
36. __________ does not contain tin as an alloying material.
37. Which of the following finds the least commercial use?
38. Pick out the wrong statement.
39. A hardened steel essentially contains
40. Diamagnetic materials are magnetised
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