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Electrolysis and Storage of Batteries - Interview Questions and Answers

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21. Trickle charging of a storage battery helps to
A. maintain proper electrolyte level
B. increase its reserve capacity
C. prevent sulphation
D. keep it fresh and fully charged
Explanation:
22. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
A. compactness
B. lower e.m.f.
C. small quantity of electrolyte used
D. higher internal resistance
Explanation:
23. The active materials of a nickel-iron battery are
A. nickel hydroxide
B. powdered iron and its oxide
C. 21% solution of KOH
D. all of the above
Explanation:
24. Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as______materials.
A. passive
B. active
C. redundant
D. inert
Explanation:
25. When the lead-acid cell is fully charged, the electrolyte assumes _____ appearance
A. dull
B. reddish
C. bright
D. milky
Explanation:
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