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EEE :: Electrolysis and Storage of Batteries

  1. Following will occur if level of electrolyte falls below plates

  2. A.

     capacity of the cell is reduced

    B.

     life of the cell is reduced

    C.

     open plates are converted to lead sulphate

    D.

     all above

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  3. In order that a hydrometer may float vertically in electrolyte its C.G. should be

  4. A.

     lowered

    B.

     raised

    C.

     undisturbed

    D.

     displaced sideways

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  5. Which of the following factors adversely affects the capacity of the leadacid battery ?

  6. A.

     Temperature of surroundings

    B.

     Specific gravity of electrolyte

    C.

     Rate of discharge

    D.

     All of the above

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  7. The current flow through electrolyte is due to the movement of

  8. A.

     ions

    B.

     holes

    C.

     electrons

    D.

     none of the above

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  9. The active materials on the positive and negative plates of a fully charged lead-acid battery are

  10. A.

     lead and lead peroxide

    B.

     lead sulphate and lead

    C.

     lead peroxide and lead

    D.

     none of the above

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  11. Cells are connected in parallel to

  12. A.

     Increase the efficiency

    B.

     Increase the current capacity

    C.

     Increase the voltage output

    D.

     Increase the internal resistance

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  13. On the average the ampere-hour efficiency of an Edison cell is about

  14. A.

     40%

    B.

     60%

    C.

     70%

    D.

     80%

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  15. On overcharging a battery

  16. A.

     It will bring about chemical change in active materials

    B.

     It will increase the capacity of the battery

    C.

     It will raise the specific gravity of the electrolyte

    D.

     None of the above will occur

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  17. Batteries are charged by

  18. A.

     rectifiers

    B.

     engine generator sets

    C.

     motor generator sets

    D.

     any one of the above methods

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  19. The active material of the positive plates of silver-zinc batteries is

  20. A.

     silver oxide

    B.

     lead oxide

    C.

     lead

    D.

     zinc powder

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