Which one of the following is NOT a synthetic material of bearing?

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 3
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  1. Plastic
  2. Nylon
  3. Brass
  4. Teflon

Answer (Detailed Solution Below)

Option 3 : Brass
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Explanation:

  • Synthetic fibers are man-made fibers, most of them are prepared from raw material petroleum called petrochemicals.
  • All fabrics are obtained from fibers, while fibers are obtained from artificial or man-made sources. 
  • They consist of a small unit or a polymer which is made from many repeating units known as monomers.
  • They include nylon, acrylics, polyurethane, and polypropylene. Millions of tons of these fibers are produced all over the world each year.
  • They can be distinguished by looking at a cross-section. Some of the synthetic fibers are rayon, nylon, polyester, etc. This fiber finds its applications in household articles like ropes, buckets, furniture, etc.
  • Among the above options, Brass comes in the category of metal.
  • Therefore, brass is not a synthetic material 
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