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EEE :: Electrolysis and Storage of Batteries

Electrolysis and Storage of Batteries - section-1
  1. It is noticed that durum charging

    2. A.

     there is a rise in voltage
    B.

     energy is absorbed by the cell
    C.

     specific gravity of H₂SO₄ is increased
    D.

     the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
    E.

     all of the above

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  2. The internal resistance of a lead-acid cell is that of Edison cell

    3. A.

     Less than
    B.

     More than
    C.

     Equal to
    D.

     None of the above

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  3. The internal resistance of an alkali cell is nearly _____ times that of the lead-acid cell.

    4. A.

     two
    B.

     three
    C.

     four
    D.

     five

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  4. Level of electrolyte in a cell should be _____ the level of plates

    5. A.

     below
    B.

     equal to
    C.

     above
    D.

     none of the above

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  5. Which of the following battery is used for aircraft ?

    6. A.

     Lead-acid battery
    B.

     Nickel-iron battery
    C.

     Dry cell battery
    D.

     Silver oxide battery

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  6. For a cell to work, which of the following condition(s) become necessary ?

    7. A.

     Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other
    B.

     Electrolyte must chemically react with one of the electrodes
    C.

     Electrolyte liquid or paste should be conducting
    D.

     All above three conditions are necessary

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  7. Internal resistance of a cell is reduced by

    8. A.

     using vent plug to permit gas formed during discharge
    B.

     increasing the plate area
    C.

     putting plates very close together
    D.

     all above methods

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  8. Short circuiting of a cell may be caused

    9. A.

     buckling of plates
    B.

     faulty separators
    C.

     lead particles forming circuit between positive and negative plates
    D.

     excessive accumulation of sediment
    E.

     any one of above

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  9. The capacity of a lead-acid cell depends on

    10. A.

     Rate of discharge
    B.

     Temperature
    C.

     Density of electrolyte
    D.

     All above

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  10. Trickle charging of a storage battery helps to

    11. A.

     maintain proper electrolyte level
    B.

     increase its reserve capacity
    C.

     prevent sulphation
    D.

     keep it fresh and fully charged

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