Batteries are charged by_____________?
A. rectifiers
B. engine generator sets
C. motor generator sets
D. any one of the above methods
Electrolysis and Storage of Batteries
In constant-current charging method, the supply voltage from discharged to fully charged condition____________?
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
Following will happen if the specific gravity of electrolyte becomes more than 1.23
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
Following will occur if level of electrolyte falls below plates____________?
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
On overcharging a battery____________?
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
In constant voltage charging method, the charging current from discharged to fully charged condition_____________?
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
Each cell has a vent cap________?
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
In a lead-acid cell, lead is called as____________?
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
The effect of sulphation is that the internal resistance__________?
The effect of sulphation is that the internal resistance__________?
A. increases
B. decreases
C. remains same
D. none of the above
The lead-acid cell should never be discharged beyond____________?
The lead-acid cell should never be discharged beyond____________?
A. 1.8 V
B. 1.9 V
C. 2 V
D. 2.1 V