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Railways PYQCBT 1 2016

RRB NTPC · Question 26

Galvanization, a process to prevent rusting, involves use of _______ coating to steel or iron. A. Nickel B. Magnesium C. Copper D. Zinc

  1. A

  2. B

  3. C

  4. D

Show answer & explanation

Answer: (D) D

Explanation

Galvanisation coats iron or steel with a layer of zinc. Zinc is more reactive, so it corrodes first and protects the iron even if the coating is scratched.