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EEE :: Electrolysis and Storage of Batteries

  1. When the lead-acid cell is fully charged, the electrolyte assumes _____ appearance

  2. A.

     dull

    B.

     reddish

    C.

     bright

    D.

     milky


  3. In ______ system the charging current is intermittently controlled at either a maximum or minimum value

  4. A.

     two rate charge control

    B.

     trickle charge

    C.

     floating charge

    D.

     an equalizing charge


  5. The charge required to liberate one gram equivalent of any substance is known as ______ constant

  6. A.

     Time

    B.

     Faraday’s

    C.

     Boltzman

    D.

     none of the above


  7. Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as______materials.

  8. A.

     passive

    B.

     active

    C.

     redundant

    D.

     inert


  9. Cells are connected in series in order to

  10. A.

     increase the voltage rating

    B.

     increase the current rating

    C.

     increase the life of the cells

    D.

     none of the above


  11. Under normal charging rate, the charging current should be

  12. A.

     10% of capacity

    B.

     20% of capacity

    C.

     30% of capacity

    D.

     40% of capacity


  13. When the load resistance equals the generator resistance which of the following will be maximum ?

  14. A.

     Current

    B.

     Efficiency of the circuit

    C.

     Power in the load resistance

    D.

     Voltage across the load resistance


  15. If a battery is wrongly connected on charge following will happen

  16. A.

     current delivered by the battery will be high

    B.

     current drawing will be nil

    C.

     current drawing will be very small

    D.

     current drawing will be very high


  17. A constant-voltage generator has

  18. A.

     minimum efficiency

    B.

     minimum current capacity

    C.

     low internal resistance

    D.

     high internal resistance


  19. The specific gravity of electrolyte is measured by

  20. A.

     manometer

    B.

     a mechanical gauge

    C.

     hydrometer

    D.

     psychrometer