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Chemical Engineering :: Materials and Construction

  1. Dies for wire drawing are generally made of

  2. A.
    mild steel
    B.
    stainless steel
    C.
    carbides
    D.
    high carbon steel

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  3. Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of

  4. A.
    brass
    B.
    copper
    C.
    high carbon steel
    D.
    aluminium

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  5. Which of the following contains maximum percentage of carbon ?

  6. A.
    Boiler plate steel
    B.
    Rail steel
    C.
    Saws for cutting steel
    D.
    Railway spring steel

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  7. Tempering of steel is done to make it

  8. A.
    brittle
    B.
    hard
    C.
    rollable
    D.
    soft

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  9. Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its

  10. A.
    high strength to weight ratio.
    B.
    low temperature strength properties.
    C.
    its ability to be cast, rolled, forged & stamped.
    D.
    high strength and corrosion & oxidation-resistance at elevated temperature.

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  11. Babbit metal used for making bearings should have

  12. A.
    high-co-efficient of friction between journal and bearing.
    B.
    ability to retain lubricant on its surface.
    C.
    low co-efficient of friction between journal and bearing.
    D.
    both(b) & (c).

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  13. Vessels made of __________ can be used to store dry chlorine.

  14. A.
    thermoplastic materials
    B.
    nickel
    C.
    steel or iron
    D.
    none of these

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  15. For spinning viscose rayon, the extrusion spinnerettes are made of

  16. A.
    platinum or gold alloys
    B.
    high carbon steel
    C.
    aluminium
    D.
    nickel

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  17. Alpha iron is stable __________ °C.

  18. A.
    above 1403
    B.
    upto 910
    C.
    above 1800
    D.
    between 910 & 1403

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