Electrolysis and Storage of Batteries

11. As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of

1. reducing time of charging
2. increasing cell capacity
3. both (a) and (b)
4. avoiding excessive gassing

View answer

12. Batteries are charged by

1. rectifiers
2. engine generator sets
3. motor generator sets
4. any one of the above methods

View answer

13. Battery charging equipment is generally installed

1. in well ventilated location
2. in clean and dry place
3. as near as practical to the battery being charged
4. in location having all above features

View answer

14. Battery container should be acid resistance, therefore it is made up of

1. glass
2. plastic
3. wood
4. all above

View answer

15. Capacity of a battery.is expressed in

1. Ah
2. Vh
3. Wh
4. kWh

View answer

16. Capacity of dry cells is

1. more when it is supplying current for intermittent periods
2. more when it is supplying current for continuous periods
3. unaffected by the type of discharge
4. none of the above

View answer

17. Cell short circuit results in

1. low sp. gravity electrolyte
2. abnormal high temperature
3. reduced gassing on charge
4. all above

View answer

18. Cells are connected in parallel to

1. increase the efficiency
2. increase the current capacity
3. increase the voltage output
4. increase the internal resistance

View answer

19. Cells are connected in series in order to

1. increase the voltage rating
2. increase the current rating
3. increase the life of the cells
4. none of the above

View answer

20. Charging a sulphated battery at high rate results in

1. boiling of electrolyte due to gassing
2. warping of plates
3. damage to separators, cell caps covers and battery case due to excessive temperature
4. all above

View answer