Question: The output voltage of a charger is__________?

• 1. less than the battery voltage
• 2. higher than the battery voltage
• 3. the same as the battery voltage
• 4. none of the above

Question: The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is____________?

• 1. just one
• 2. always greater than one
• 3. always less than one
• 4. none of the above

Question: The storage battery generally used in electric power station is__________?

• 1. nickel-cadmium battery
• 2. zinc-carbon battery
• 3. lead-acid battery
• 4. none of the above

Question: During the charging of a lead-acid cell__________?

• 1. its voltage increases
• 2. it gives out energy
• 3. its cathode becomes dark chocolate brown in colour
• 4. specific gravity of H2SO4 decreases

Question: The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?

• 1. lead and lead peroxide
• 2. lead sulphate and lead
• 3. lead peroxide and lead
• 4. none of the above

Question: The capacity of a lead-acid cell does not depend on its___________?

• 1. temperature
• 2. rate of charge
• 3. rate of discharge
• 4. quantity of active material

Question: When a lead-acid battery is in fully charged condition, the color of its positive plate is__________?

• 1. dark grey
• 2. brown
• 3. dark brown
• 4. none of above

Question: The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?

• 1. Newton’s law
• 2. Faraday’s law of electromagnetic
• 3. Faraday’s law of electrolysis
• 4. Gauss’s law

Question: During charging the specific gravity of the electrolyte of a lead-acid battery:

• 1. increases
• 2. decreases
• 3. remains the same
• 4. becomes zero

Question: The active materials of a nickel-iron battery are___________?

• 1. nickel hydroxide
• 2. powdered iron and its oxide
• 3. 21% solution of KOH
• 4. all of the above