Hiried Electrolysis and Storage of Batteries Multiple choice Questions and Answers pdf

51. In a lead-acid cell, lead is called as
(a) positive active material
(b) negative active material
(c)     passive material
(d) none of the above
Ans: b

52. The lead-acid cell should never be discharged beyond
(a) 1.8 V
(b) 1.9 V
(c) 2 V
(d) 2.1 V
Ans: a

53. On overcharging a battery
(a)     it will bring about chemical change in active materials
(b)     it will increase the capacity of the battery
(c) it will raise the specific gravity of the electrolyte
(d) none of the above will occur
Ans: d

54. Each cell has a vent cap
(a)     to allow gases out when the cell is on charge
(b)     to add water to the cell if needed
(c) to check the level of electrolyte
(d) to do all above functions
Ans: d

55. Following will occur if level of electrolyte falls below plates
(a) capacity of the cell is reduced
(b) life of the cell is reduced
(c) open plates are converted to lead sulphate
(d) all above
Ans: d

56. In constant voltage charging method, the charging current from discharged to fully charged condition
(a)     decreases
(b)     increases
(c) remains constant
(d) none of the above
Ans: a

57. 48 ampere-hour capacity would deliver a current of
(a)     48 amperes for 1 hour
(b)     24 amperes for 2 hours
(c) 8 amperes for 6 hours
(d) 6 amperes for 8 hours
Ans: d

58. In constant-current charging method, the supply voltage from discharged to
fully charged condition
(a)     decreases
(b)     increases
(c) remains constant
(d) none of the above
Ans: b

59. Battery charging equipment is generally installed
(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
Ans: d

60. Following will happen if the specific gravity of electrolyte becomes more than 1.23.
(a)     Loss of capacity
(b)     Loss of life
(c) Corrosion of the grids of the plate
(d) All above
Ans: d

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