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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

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  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

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  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

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  7. Steel is welded using the __________ flame.

  8. A.

     Carburising

    B.

     Neutral

    C.

     Oxidising

    D.

     All of the above

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  9. Reduction reaction involves the

  10. A.

     Loss of electrons

    B.

     Increase in oxidation number

    C.

     Gain of electrons

    D.

     Addition of oxygen

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  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

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  13. Nitriding of a steel part does not increase its

  14. A.

     Grain size

    B.

     Fatigue limit

    C.

     Surface hardness

    D.

     Wear resistance

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

  16. A.

     Molybdenum

    B.

     Chromium

    C.

     Vanadium

    D.

     Silicon

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  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

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

  20. A.

     Iron

    B.

     Copper

    C.

     Rubber

    D.

     Nickel

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