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.Management Sciences
Category: Electrolysis and Storage of 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
The watt-hour efficiency of a lead-acid cell varies between________?
A. 25 to 35%
B. 40 to 60%
C. 70 to 80%
D. 90 to 95%
Excessive charging a battery tends to____________?
A. produce gassing
B. increase the internal resistance of the battery
C. to corrode the positive plates into lead peroxide thereby weakening them physically
D. bring about all above changes
Five 2 V cells are connected in parallel. The output voltage is__________?
A. 1 V
B. 1.5 V
C. 1.75 V
D. 2 V
Charging a sulphated battery at high rate results in___________?
A. boiling of electrolyte due to gassing
B. warping of plates
C. damage to separators, cell caps covers and battery case due to excessive temperature
D. all above
Extent of corrosion in the underground metal work depends upon___________?
A. amount of moisture
B. type of metals
C. type of soil chemicals
D. all above factors
The substances which combine together to store electrical energy during the charge are called ________ materials
A. active
B. passive
C. inert
D. dielectric
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