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Chemical Engineering :: Materials and Construction

  1. Acetaldehyde is shipped in __________ drums.

  2. A.
    cast iron
    B.
    steel
    C.
    aluminium
    D.
    either (b) & (c)

  3. Monel metal is an alloy of

  4. A.
    molybdenum and nickel.
    B.
    nickel and copper.
    C.
    molybdenum and aluminium.
    D.
    molybdenum and zinc.

  5. German silver is an alloy of copper, nickel and

  6. A.
    zinc
    B.
    silver
    C.
    tin
    D.
    lead

  7. The presence of impurities in iron

  8. A.
    increases its melting point.
    B.
    does not affect its melting point.
    C.
    decreases its melting point.
    D.
    makes it malleable.

  9. Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?

  10. A.
    Silicon steel
    B.
    Chromium steel
    C.
    Molybdenum steel
    D.
    None of these

  11. Visco-elastic behaviour of materials which is time dependent is common in

  12. A.
    plastics
    B.
    crystalline solid
    C.
    non-crystalline solids
    D.
    non-crystalline organic polymer

  13. Which of the following is not an alloy of copper ?

  14. A.
    Muntz metal
    B.
    Admirability gun metal
    C.
    German silver
    D.
    Pewter metal

  15. Which of the following is the most prone to atmospheric corrosion ?

  16. A.
    Silver
    B.
    Iron
    C.
    Tin
    D.
    Copper

  17. As the impurities are oxidised, the melting point of iron

  18. A.
    decreases.
    B.
    remains unchanged.
    C.
    increases.
    D.
    may increase or decrease ; unpredictable.

  19. In a plate type heat exchanger, heat transfer plates are never made of

  20. A.
    stainless steel
    B.
    cast iron
    C.
    titanium
    D.
    hastealloy C