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Chemical Engineering :: Chemical Process

  1. 'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

  2. A.

     Final rolling out of paper

    B.

     Cutting of fibres

    C.

     Hydration of fibres

    D.

     Fibrillation of fibre


  3. Coke used for the production of calcium carbide should have

  4. A.

     Low ash content

    B.

     Low ignition temperature

    C.

     High electrical resistivity

    D.

     All of the above


  5. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

  6. A.

     Diamine and the ring

    B.

     Dibasic acid and the ring

    C.

     Diamine and the dibasic acid

    D.

     None of these


  7. Nylon-6 is manufactured from

  8. A.

     Caprolactum

    B.

     Hexamethylene diamine and adipic acid

    C.

     Hexamethylene diamine and maleic anhydride

    D.

     Hexamethylene diamine and sebacic acid


  9. Oil is a/an

  10. A.

     Mixture of glycerides

    B.

     Mixture of glycerides of fatty acids

    C.

     Solid at normal temperature

    D.

     Ester of alcohols other than glycerine


  11. Saponification value/number of an oil or fat is a measure of its

  12. A.

     Fatty acid content

    B.

     Degree of unsaturation of the fatty acids present in it

    C.

     Average molecular weight

    D.

     Insoluble fatty acid content


  13. High acid value of an oil or fat is an indication of

  14. A.

     Storage under improper conditions

    B.

     Absence of unsaturation

    C.

     Its smaller molecular weight

    D.

     None of these


  15. Oleum produces fumes of

  16. A.

     SO₂

    B.

     H₂SO₄

    C.

     SO₃

    D.

     SO₂ + H₂SO₄


  17. Dry ice (solidified CO₂) is used for the

  18. A.

     Storage & shipment of frozen foods and ice-creams

    B.

     Liquefaction of permanent gases

    C.

     Liquefaction of natural gas

    D.

     None of these


  19. Which one of the following is not an elastomer?

  20. A.

     Polyisoperene

    B.

     Neoprene

    C.

     Nitrile-butadiene

    D.

     None of these