During the charging of a lead-acid cell specific gravity of H₂SO₄ decreases its cathode becomes dark chocolate brown in colour it gives out energy its voltage increases TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following has lower sp. gravity V All of the listed here Dilute H₂SO₄ Concentrated H₂SO₄ Water TRUE ANSWER : ? YOUR ANSWER : ?
In alkaline cell the electrolyte is concentrated sulphuric acid kOH dilute sulphuric acid NaOH TRUE ANSWER : ? YOUR ANSWER : ?
Mercury cell has which of the following characteristics? All of these Flat discharge current-voltage curve High power to weight ratio Comparatively longer shelf life under adverse conditions of high temperature and humidity TRUE ANSWER : ? YOUR ANSWER : ?
For a cell to work, which of the following condition(s) become necessary ? Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other All of the listed here Electrolyte must chemically react with one of the electrodes Electrolyte liquid or paste should be conducting TRUE ANSWER : ? YOUR ANSWER : ?
Local action in a battery is indicated by excessive gassing under load conditions excessive drop in the specific gravity of electrolyte even when the cell is on open circuit none of the listed here both of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is incorrect? A storage cell has a reversible chemical reaction A primary cell has an irreversible chemical reaction A lead-acid cell can be recharged A carbon-zinc cell has unlimited shelf life TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is always less than one none of the listed here just one always greater than one TRUE ANSWER : ? YOUR ANSWER : ?
The specific gravity of electrolyte is measured by hydrometer a mechanical gauge psychrometer manometer TRUE ANSWER : ? YOUR ANSWER : ?
Each cell has a vent cap to allow gases out when the cell is on charge all of the listed here to add water to the cell if needed to check the level of electrolyte TRUE ANSWER : ? YOUR ANSWER : ?