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Chemical Engineering :: Materials and Construction

  1. Babbit metals used for making bearings are

  2. A.
    tin or lead based alloys.
    B.
    short of antifrictional properties.
    C.
    having homogenous microstructure.
    D.
    yellow metals.

  3. Pipes for bi-cycle frames are made of __________ steel.

  4. A.
    hot rolled
    B.
    chrome carbon
    C.
    cold rolled
    D.
    stainless

  5. Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ?

  6. A.
    Silicone rubber, teflon, procelain and wood.
    B.
    Nickel, monel, stainless steel and graphite.
    C.
    Aluminium, copper, high silicon iron.
    D.
    Brass, cast iron, mild steel and tin.

  7. Interchain forces are the weakest in case of

  8. A.
    plastics
    B.
    fibres
    C.
    elastomers
    D.
    both rubber & elastomers

  9. __________ possesses viscoelastic properties.

  10. A.
    Cork
    B.
    Glass
    C.
    Graphite
    D.
    Rubber

  11. Steel tower used for the storage of oleum

  12. A.
    is lined with lead.
    B.
    need not be lined.
    C.
    is lined with rubber.
    D.
    is lined with acid-proof bricks.

  13. Plastics are

  14. A.
    used in very high temperature applications.
    B.
    non-biodegradable.
    C.
    not suitable for drainage pipe manufacture.
    D.
    all (a), (b) & (c).

  15. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of

  16. A.
    rubber lined mild steel
    B.
    lead lined mild steel
    C.
    aluminium
    D.
    cast iron

  17. Wood is corroded by

  18. A.
    hydrochloric acid
    B.
    SO2 (dry or wet)
    C.
    chlorine (dry or wet)
    D.
    all (a), (b) and (c)

  19. Brass is an alloy of

  20. A.
    nickel and tin
    B.
    copper and zinc
    C.
    tin and lead
    D.
    copper, nickel and zinc