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EEE :: Electrolysis and Storage of Batteries

  1. Capacity of a battery.is expressed in

  2. A.

     Ah

    B.

     Vh

    C.

     Wh

    D.

     kWh


  3. Which of the following primary cells has the lowest voltage ?

  4. A.

     Lithium

    B.

     Zinc-chloride

    C.

     Mercury

    D.

     Carbon-zinc


  5. In a lead-acid battery the energy is stored in the form of

  6. A.

     charged ions

    B.

     chemical energy

    C.

     electrostatic energy

    D.

     electromagnetic energy


  7. When a lead-acid battery is in fully charged condition, the color of its positive plate is

  8. A.

     dark grey

    B.

     brown

    C.

     dark brown

    D.

     none of above


  9. Undercharging

  10. A.

     Reduces specific gravity of the electrolyte

    B.

     Increases specific gravity of the electrolyte

    C.

     Produces excessive gassing

    D.

     Increases the temperature


  11. All the electrical connections between the battery and vehicle should be by

  12. A.

     thin aluminium wires

    B.

     thin copper wires

    C.

     rigid cables

    D.

     flexible cables


  13. Hydrogen evolved during charging produces explosive mixture when it is more than

  14. A.

     2%

    B.

     4%

    C.

     6%

    D.

     8%


  15. It is noticed that during discharging the following does not happen

  16. A.

     both anode and cathode become PbS04

    B.

     specific gravity of H?SO? decreases

    C.

     voltage of the cell decreases

    D.

     the cell absorbs energy


  17. The capacity of a battery is expressed in terms of

  18. A.

     current rating

    B.

     voltage rating

    C.

     ampere-hour rating

    D.

     none of the above


  19. The e.m.f. of an Edison cell, when fully charged, is nearly

  20. A.

     1.4 V

    B.

     1 V

    C.

     0.9 V

    D.

     0.8 V