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SSC CPO 2019 PYQ — Question 75

SSC CPO Tier I - 12th March 2019 - Shift 2 • General Awareness • Q75

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Which element is used to make the coils used in water heaters?

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Correct answer: C

Explanation

The correct answer is option 3 i.e. Nichrome

  • Most resistance wire heating elements use nichrome 80/20 (80% Nickel, 20% Chromium) wire. 
  • Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.