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Chemical Engineering :: Chemical Process

  1. Portland cement consists mainly of

  2. A.

     CaO & SiO₂

    B.

     SiO₂ & Al2O₃

    C.

     CaO & Al2O₃

    D.

     CaO & FE₂O₃


  3. Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have

  4. A.

     High electrical insulation properties

    B.

     Sharp melting points

    C.

     Low co-efficient of thermal expansion

    D.

     Compressive strength much greater than their tensile strengths


  5. The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.

  6. A.

     800

    B.

     1600

    C.

     4000

    D.

     8500


  7. Electrodeposition of metals i.e. electroplating is never done on

  8. A.

     Metals

    B.

     Alloys

    C.

     Refractories

    D.

     Non-metals


  9. Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

  10. A.

     Reduce its viscosity

    B.

     Increase its viscosity

    C.

     Reduce the variation in its viscosity with temperature

    D.

     Increase the variation in its viscosity with temperature


  11. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as

  12. A.

     Bakelite

    B.

     Neoprene

    C.

     Teflon

    D.

     Nylon-66


  13. Lindane is

  14. A.

     Not a fumigant

    B.

     BHC (Benzene Hexa Chloride) containing 99% γ-isomer

    C.

     A by-product of BHC manufacture

    D.

     Both B and C


  15. Litharge is

  16. A.

     Lead oxide

    B.

     Zinc oxide

    C.

     Zinc sulphide

    D.

     Cellulosic photographic material


  17. Lithopaneis

  18. A.

     Explosive

    B.

     White lead

    C.

     Filter aid

    D.

     ZnS (white pigment)


  19. Which of the following is an yellow pigment?

  20. A.

     Titanium dioxide

    B.

     Ferrous sulphate

    C.

     Lead chromates

    D.

     Zinc sulphides