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  9. Q3491

RRB Junior Engineer / DMS / CMA 2019 · Question 3491 of 3719

Gun metal contains 2 percent of-

  1. ACopper
  2. BTin
  3. CNickel
  4. DZincCorrect

Answer: D. Zinc

Explanation

Explanation: Gunmetal is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc . It was used mainly for making guns and bullets . Now it is superseded by Steel. Gunmetal is used extensively for making heavy machinery parts as it can withstand high pressure and is corrosion resistant.

Source: RRB JE 2019 (CBT 2) (ME) Previous Year Paper (31 Aug 2019) — prepp.in solved-paper PDF (answer key with explanations) · reliable-secondary

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