Electrolysis and storage of batteries Archives - Page 3 of 10 - MCQ and Quiz for Exams

21. Negative plate of an Edison cell is made of

copper

lead

iron

silver oxide

Detailed SolutionNegative plate of an Edison cell is made of

22. In constant-current charging method, the supply voltage from discharged to fully charged condition

decreases

increases

remains constant

none of the above

Detailed SolutionIn constant-current charging method, the supply voltage from discharged to fully charged condition

23. The capacity of a lead-acid cell does not depend on its

temperature

rate of charge

rate of discharge

quantity of active material

Detailed SolutionThe capacity of a lead-acid cell does not depend on its

24. Persons preparing electrolyte should wear

goggles or other face shield

rubber

rubber boots and gloves

all above safety devices

Detailed SolutionPersons preparing electrolyte should wear

25. On the average the ampere-hour efficiency of an Edison cell is about

40%

60%

70%

80%

Detailed SolutionOn the average the ampere-hour efficiency of an Edison cell is about

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

Less than

More than

Equal to

None of the above

Detailed SolutionThe internal resistance of a lead-acid cell is that of Edison cell

27. Following will happen if the specific gravity of electrolyte becomes more than 1.23.

Loss of capacity

Loss of life

Corrosion of the grids of the plate

All above

Detailed SolutionFollowing will happen if the specific gravity of electrolyte becomes more than 1.23.

28. Undercharging

Reduces specific gravity of the electrolyte

Increases specific gravity of the electrolyte

Produces excessive gassing

Increases the temperature

Detailed SolutionUndercharging

29. Sulphated cells are indicated by

the loss of capacity of the cell

the decrease of the specific gravity

the low voltage of the cell on discharge

all above conditions

Detailed SolutionSulphated cells are indicated by

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

two

three

four

five

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

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