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Chemical Engineering :: Chemical Engineering Basics-2

  1. The speed of sound will be maximum in

  2. A.

     Vacuum

    B.

     Metal

    C.

     Air

    D.

     Water


  3. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.

  4. A.

     Evaporative capacity

    B.

     Evaporation efficiency

    C.

     Thermal efficiency

    D.

     Steam load


  5. Two stroke engine compared to a four stroke engine has

  6. A.

     Higher efficiency

    B.

     Less fuel consumption

    C.

     Higher power to weight ratio

    D.

     Lower initial cost


  7. Steel is welded using the __________ flame.

  8. A.

     Carburising

    B.

     Neutral

    C.

     Oxidising

    D.

     All of the above


  9. Reduction reaction involves the

  10. A.

     Loss of electrons

    B.

     Increase in oxidation number

    C.

     Gain of electrons

    D.

     Addition of oxygen


  11. For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

  12. A.

     Increases

    B.

     Decreases

    C.

     Remains constant

    D.

     Increases to a maximum before decreasing


  13. Nitriding of a steel part does not increase its

  14. A.

     Grain size

    B.

     Fatigue limit

    C.

     Surface hardness

    D.

     Wear resistance


  15. Nickel and __________ are the alloying element added in steel to increase its toughness.

  16. A.

     Molybdenum

    B.

     Chromium

    C.

     Vanadium

    D.

     Silicon


  17. The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong

  18. A.

     Base and strong acid

    B.

     Base and weak acid

    C.

     Acid and weak base

    D.

     None of these


  19. __________ has a negative co-efficient of linear expansion.

  20. A.

     Iron

    B.

     Copper

    C.

     Rubber

    D.

     Nickel