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Electrolysis and Storage of Batteries - Interview Questions and Answers

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66. Local action in a battery is indicated by
A. excessive gassing under load conditions
B. excessive drop in the specific gravity of electrolyte even when the cell is on open circuit
C. both (a) and (b)
D. none of the above
Explanation:
67. In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3
A. 6 parts of acid to 4 parts of water
B. 4 parts of acid to 4 parts of water
C. 4 parts of acid to 6 parts of water
D. 4 parts of acid to 8 parts of water
Explanation:
68. The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
A. just one
B. always greater than one
C. always less than one
D. none of the above.
Explanation:
69. Level of electrolyte in a cell should be _____ the level of plates
A. below
B. equal to
C. above
D. none of the above
Explanation:
70. Batteries are charged by
A. rectifiers
B. engine generator sets
C. motor generator sets
D. any one of the above methods
Explanation:
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