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Chemical Engineering :: Chemical Engineering Basics-2

  1. __________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

  2. A.

     Packed

    B.

     Bubble

    C.

     Spray

    D.

     Tray


  3. Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?

  4. A.

     Wood's metal

    B.

     Babbit metal

    C.

     Monel metal

    D.

     Duralumin


  5. Adhesives

  6. A.

     Can't be used in the form of pressure sensitive tapes

    B.

     Can't join two dissimilar metals

    C.

     Cure instantaneously after application on a surface

    D.

     None of these


  7. The most commonly used material for sewers for carrying sewage in the normal situation is

  8. A.

     Asbestos cement

    B.

     Stainiess steel

    C.

     Stoneware

    D.

     Cast iron


  9. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.

  10. A.

     Percentage elongation

    B.

     Brinell hardness

    C.

     Tensile strength

    D.

     All of the above


  11. Ageing of steel refers to the

  12. A.

     Degradation of steel by corrosion

    B.

     Failure of steel structure by overstress-ing

    C.

     Return of sharp yield point in temper rolled low carbon sheet after a period of time

    D.

     Decarburisation of steel by overheating


  13. The main reducing agent in iron blast furnace is

  14. A.

     Carbon dioxide

    B.

     Carbon monoxide

    C.

     Oxygen

    D.

     Air


  15. Main constituent of bone ash is

  16. A.

     Ammonium phosphate

    B.

     Calcium phosphate

    C.

     Animal charcoal

    D.

     Ammonium sulphate


  17. pH value of rain water in India ranges from

  18. A.

     5.5 to 7.5

    B.

     8 to 9.5

    C.

     3.5 to 5

    D.

     9.5 to 10.5


  19. Slight displacement of a floating body in liquid makes it to oscillate about its

  20. A.

     Centre of pressure

    B.

     Centre of gravity

    C.

     Metacentre

    D.

     Centre of pressure