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.Management Sciences
Category: Electrolysis and Storage of Batteries
The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?
A. lead and lead peroxide
B. lead sulphate and lead
C. lead peroxide and lead
D. none of the above
Sulphated cells are indicated by____________?
A. the loss of capacity of the cell
B. the decrease of the specific gravity
C. the low voltage of the cell on discharge
D. all above conditions
For a cell to work, which of the following condition(s) become necessary ___________?
A. Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other
B. Electrolyte must chemically react with one of the electrodes
C. Electrolyte liquid or paste should be conducting
D. All above three conditions are necessary
During the idle period of the battery, strong electrolyte tends to change the active material of the cell into____________?
A. Pb02
B. PbSC-4
C. PbO
D. Pb
It is noticed that during discharging the following does not happen___________?
A. both anode and cathode become PbS04
B. specific gravity of H2SO4 decreases
C. voltage of the cell decreases
D. the cell absorbs energy
The storage battery generally used in electric power station is__________?
A. nickel-cadmium battery
B. zinc-carbon battery
C. lead-acid battery
D. none of the above
Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials
A. passive
B. active
C. redundant
D. inert
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
The capacity of a lead-acid cell is measured in_____________?
A. amperes
B. ampere-hours
C. watts
D. watt-hours
The output voltage of a charger is__________?
A. less than the battery voltage
B. higher than the battery voltage
C. the same as the battery voltage
D. none of the above
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