electrolysis and storage of batteries MCQs – Page 2

Practise focused electrolysis and storage of batteries questions with marked answers for exam preparation and subject revision.

electrolysis and storage of batteries Mcqs
21. If a battery is wrongly connected on charge following will happen__________?
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A. current drawing will be very small

B. current delivered by the battery will be high

C. current drawing will be nil

D. current drawing will be very high
22. Trickle charging of a storage battery helps to___________?
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A. keep it fresh and fully charged

B. maintain proper electrolyte level

C. prevent sulphation

D. increase its reserve capacity

23. 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
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A. 4 parts of acid to 4 parts of water

B. 4 parts of acid to 6 parts of water

C. 6 parts of acid to 4 parts of water

D. 4 parts of acid to 8 parts of water

24. The effect of sulphation is that the internal resistance__________?
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A. decreases

B. increases

C. none of the above

D. remains same

25. The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?
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A. Faradays law of electromagnetic

B. Faradays law of electrolysis

C. Gausss law

D. Newtons law

26. A dead storage battery can be revived by___________?
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A. a dose of H2SO4

B. none of the above

C. adding so-called battery restorer

D. adding distilled water

27. Each cell has a vent cap________?
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A. to add water to the cell if needed

B. to check the level of electrolyte

C. to allow gases out when the cell is on charge

D. to do all above functions
28. Following will happen if the specific gravity of electrolyte becomes more than 1.23
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A. All above

B. Loss of life

C. Corrosion of the grids of the plate

D. Loss of capacity

29. Excessive formation of lead sulphate on the surface of the plates happens because of___________?
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A. low level of electrolyte

B. all above

C. persistent undercharging

D. allowing a battery to stand in discharged condition for a long time

E. topping up with electrolyte

30. Cells are connected in series in order to_____________?
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A. increase the life of the cells

B. increase the voltage rating

C. none of the above

D. increase the current rating

31. In a battery cover is placed over the element and sealed to the top of the battery container. This is done____________?
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A. to reduce evaporation of water from electrolyte

B. to exclude dirt and foreign matter from the electrolyte

C. to discharge both of the above functions

D. to discharge none of the above functions

32. While preparing electrolyte for a lead-acid battery___________?
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A. water is poured into acid

B. anyone of the two can be added to other chemical

C. acid is poured into water
33. Five 2 V cells are connected in parallel. The output voltage is__________?
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A. 2 V

B. 1.75 V

C. 1 V

D. 1.5 V

34. Which of the following factors adversely affects the capacity of the leadacid battery ?
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A. Temperature of surroundings

B. Specific gravity of electrolyte

C. Rate of discharge

D. All of the above
35. On overcharging a battery____________?
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A. it will increase the capacity of the battery

B. none of the above will occur

C. it will raise the specific gravity of the electrolyte

D. it will bring about chemical change in active materials

36. The substances which combine together to store electrical energy during the charge are called ________ materials
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A. active

B. passive

C. inert

D. dielectric

37. On the average the ampere-hour efficiency of an Edison cell is about__________?
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A. 70%

B. 40%

C. 80%

D. 60%

38. The internal resistance of a lead-acid cell is that of Edison cell____________?
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A. equal to

B. less than

C. more than

D. none of the above

39. The capacity of a battery is expressed in terms of____________?
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A. voltage rating

B. current rating

C. none of the above

D. ampere-hour rating
40. When the load resistance equals the generator resistance which of the following will be maximum __________?
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A. Efficiency of the circuit

B. Power in the load resistance

C. Current

D. Voltage across the load resistance