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.Management Sciences
Category: Electrolysis and Storage of Batteries
The effect of sulphation is that the internal resistance__________?
A. increases
B. decreases
C. remains same
D. none of the above
The capacity of a lead-acid cell depends on
A. rate of discharge
B. temperature
C. density of electrolyte
D. quantity of active materials
E. all above
When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in___________?
A. charged state
B. discharged state
C. both (A) and (B)
D. active state
As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?
A. reducing time of charging
B. increasing cell capacity
C. both (A) and (B)
D. avoiding excessive gassing
During discharge, the active material of both the positive and negative plates is changed to___________?
A. Pb
B. Pb02
C. PbO
D. PbS04
Satellite power requirement is provided through________?
A. solar cells
B. dry cells
C. nickel-cadmium cells
D. lead-acid batteries
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
Cells are connected in parallel to__________?
A. increase the efficiency
B. increase the current capacity
C. increase the voltage output
D. increase the internal resistance
While preparing electrolyte for a lead-acid battery___________?
A. water is poured into acid
B. acid is poured into water
C. anyone of the two can be added to other chemical
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