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EEE :: Electrolysis and Storage of Batteries

Electrolysis and Storage of Batteries - section-1
  1. Which of the following cell has a reversible chemical reaction ?

    2. A.

     Lead-acid
    B.

     Mercury oxide
    C.

     Carbon-zinc
    D.

     Silver-oxide

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  2. The open circuit voltage of any storage cell depends wholly upon

    3. A.

     its chemical constituents
    B.

     on the strength of its electrolyte
    C.

     its temperature
    D.

     all above

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  3. Battery charging equipment is generally installed

    4. A.

     In well ventilated location
    B.

     In clean and dry place
    C.

     As near as practical to the battery being charged
    D.

     In location having all above features

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  4. The effect of sulphation is that the internal resistance

    5. A.

     increases
    B.

     decreases
    C.

     remains same
    D.

     none of the above

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  5. The ampere-hour efficiency of a leadacid cell is normally between

    6. A.

     20 to 30%
    B.

     40 to 50%
    C.

     60 to 70%
    D.

     90 to 95%

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  6. Satellite power requirement is provided through

    7. A.

     solar cells
    B.

     dry cells
    C.

     nickel-cadmium cells
    D.

     lead-acid batteries

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  7. Which of the following has lower sp. gravity V

    8. A.

     Dilute H₂SO₄
    B.

     Concentrated H₂SO₄
    C.

     Water
    D.

     Any of the above

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  8. Internal resistance of a cell is due to

    9. A.

     resistance of electrolyte
    B.

     electrode resistance
    C.

     surface contact resistance between electrode and electrolyte
    D.

     all above

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  9. During the charging of a lead-acid cell

    10. A.

     its voltage increases
    B.

     it gives out energy
    C.

     its cathode becomes dark chocolate brown in colour
    D.

     specific gravity of H₂SO₄ decreases

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  10. Chargmg of sulphated battery produces ____ heat.

    11. A.

     no
    B.

     very little
    C.

     less
    D.

     more

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