Search
.Management Sciences
Category: Electrolysis and Storage of Batteries
The lead-acid cell should never be discharged beyond____________?
A. 1.8 V
B. 1.9 V
C. 2 V
D. 2.1 V
Which of the following is incorrect ?
A. A storage cell has a reversible chemical reaction
B. A lead-acid cell can be recharged
C. A carbon-zinc cell has unlimited shelf life
D. A primary cell has an irreversible chemical reaction
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
Persons preparing electrolyte should wear___________?
A. goggles or other face shield
B. rubber
C. rubber boots and gloves
D. all above safety devices
As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?
A. compactness
B. lower e.m.f.
C. small quantity of electrolyte used
D. higher internal resistance
In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?
A. one part H2O, three parts H2SO4
B. two parts H2O, two parts H2SO4
C. three parts H2O, one part H2SO4
D. all H2S04
It is noticed that durum charging___________?
A. there is a rise in voltage
B. energy is absorbed by the cell
C. specific gravity of H2SO4 is increased
D. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
E. all of the above
The specific gravity of electrolyte is measured by____________?
A. manometer
B. a mechanical gauge
C. hydrometer
D. psychrometer
Internal resistance of a cell is reduced by__________?
A. using vent plug to permit gas formed during discharge
B. increasing the plate area
C. putting plates very close together
D. all above methods
Recent Comments