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  • Manufacturing Industries - II
  • Which of the following is used to harden the steel during...
Multiple choice

Which of the following is used to harden the steel during manufacturing?

  1. Iron ore

  2. Coking coal

  3. Limestone

  4. Manganese

  5. Nickel

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. Some quantities of manganese, are also required to harden the steel.

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