The active materials on the positive and negative plates of a fully charged lead-acid battery are None of these lead and lead peroxide lead peroxide and lead lead sulphate and lead TRUE ANSWER : ? YOUR ANSWER : ?
Excessive formation of lead sulphate on the surface of the plates happens because of allowing a battery to stand in discharged condition for a long time all of the listed here persistent undercharging low level of electrolyte TRUE ANSWER : ? YOUR ANSWER : ?
Hydrogen evolved during charging produces explosive mixture when it is more than 10 % 8 % 5 % 6 % TRUE ANSWER : ? YOUR ANSWER : ?
The body of Edison cell is made of aluminium rubber nickel plated steel bakelite TRUE ANSWER : ? YOUR ANSWER : ?
Local action in a battery is indicated by excessive drop in the specific gravity of electrolyte even when the cell is on open circuit both of the listed here none of the listed here excessive gassing under load conditions TRUE ANSWER : ? YOUR ANSWER : ?
In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3 4 parts of acid to 6 parts of water 6 parts of acid to 4 parts of water 4 parts of acid to 4 parts of water 4 parts of acid to 8 parts of water TRUE ANSWER : ? YOUR ANSWER : ?
Life of the batteries is in the following ascending order. Lead-acid cell, Edison cell, Nickel cadmium cell Nickel-cadmium cell, Edison cell, lead-acid cell Lead-acid cell, Nickel-cadmium cell, Edison cell Edison cell, Nickel-cadmium cell, lead-acid cell TRUE ANSWER : ? YOUR ANSWER : ?
The effect of sulphation is that the internal resistance decreases increases none of the listed here remains same TRUE ANSWER : ? YOUR ANSWER : ?
Sulphated cells are indicated by the low voltage of the cell on discharge the decrease of the specific gravity the loss of capacity of the cell all of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in active state none of the listed here discharged state charged state TRUE ANSWER : ? YOUR ANSWER : ?