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MCQs 1: Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials

passive active redundant inert
Answer Explanation

MCQs 2: During the charging and discharging of a nickel-iron cell____________?

corrosive fumes are produced water is neither formed nor absorbed nickel hydroxide remains unsplit its e.m.f. remains constant
Answer Explanation

MCQs 3: A dead storage battery can be revived by___________?

adding distilled water adding so-called battery restorer a dose of H2SO4 none of the above
Answer Explanation

MCQs 4: Five 2 V cells are connected in parallel. The output voltage is__________?

1 V 1.5 V 1.75 V 2 V
Answer Explanation

MCQs 5: As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?

reducing time of charging increasing cell capacity both (A) and (B) avoiding excessive gassing
Answer Explanation

MCQs 6: The capacity of a battery is expressed in terms of____________?

current rating voltage rating ampere-hour rating none of the above
Answer Explanation

MCQs 7: Cells are connected in series in order to_____________?

increase the voltage rating increase the current rating increase the life of the cells none of the above
Answer Explanation

MCQs 8: The best indication about the state of charge on a lead-acid battery is given by____________?

output voltage temperature of electrolyte specific gravity of electrolyte none of the above
Answer Explanation

MCQs 9: The output voltage of a charger is__________?

less than the battery voltage higher than the battery voltage the same as the battery voltage none of the above
Answer Explanation

MCQs 10: The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is____________?

just one always greater than one always less than one none of the above
Answer Explanation

MCQs 11: The storage battery generally used in electric power station is__________?

nickel-cadmium battery zinc-carbon battery lead-acid battery none of the above
Answer Explanation

MCQs 12: During the charging of a lead-acid cell__________?

its voltage increases it gives out energy its cathode becomes dark chocolate brown in colour specific gravity of H2SO4 decreases
Answer Explanation

MCQs 13: The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?

lead and lead peroxide lead sulphate and lead lead peroxide and lead none of the above
Answer Explanation

MCQs 14: The capacity of a lead-acid cell does not depend on its___________?

temperature rate of charge rate of discharge quantity of active material
Answer Explanation

MCQs 15: The charge required to liberate one gram equivalent of any substance is known as _________ constant

time Faraday’s Boltzman
Answer Explanation

MCQs 16: When a lead-acid battery is in fully charged condition, the color of its positive plate is__________?

dark grey brown dark brown none of above
Answer Explanation

MCQs 17: The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?

Newton’s law Faraday’s law of electromagnetic Faraday’s law of electrolysis Gauss’s law
Answer Explanation

MCQs 18: During charging the specific gravity of the electrolyte of a lead-acid battery

increases decreases remains the same becomes zero
Answer Explanation

MCQs 19: The active materials of a nickel-iron battery are___________?

nickel hydroxide powdered iron and its oxide 21% solution of KOH all of the above
Answer Explanation

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