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MCQs 1: When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in___________?

charged state discharged state both (A) and (B) active state
Answer Explanation

MCQs 2: Negative plate of an Edison cell is made of__________?

copper lead iron silver oxide
Answer Explanation

MCQs 3: The specific gravity of electrolyte is measured by____________?

manometer a mechanical gauge hydrometer psychrometer
Answer Explanation

MCQs 4: The internal resistance of a lead-acid cell is that of Edison cell____________?

less than more than equal to none of the above
Answer Explanation

MCQs 5: Electrolyte used in an Edison cell is___________?

NaOH KOH HC1 HN03
Answer Explanation

MCQs 6: Life of the Edison cell is at least_____________?

five years seven years eight years ten years
Answer Explanation

MCQs 7: On the average the ampere-hour efficiency of an Edison cell is about__________?

40% 60% 70% 80%
Answer Explanation

MCQs 8: The e.m.f. of an Edison cell, when fully charged, is nearly______________?

1.4 V 1 V 0.9 V 0.8 V
Answer Explanation

MCQs 9: The internal resistance of an alkali cell is nearly _________ times that of the lead-acid cell

two three four five
Answer Explanation

MCQs 10: The capacity of a lead-acid cell depends on

rate of discharge temperature density of electrolyte quantity of active materials all above
Answer Explanation

MCQs 11: The ampere-hour efficiency of a lead acid cell is normally between_________?

20 to 30% 40 to 50% 60 to 70% 90 to 95%
Answer Explanation

MCQs 12: When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance

dull reddish bright milky
Answer Explanation

MCQs 13: The active material of the positive plates of silver-zinc batteries is_________?

silver oxide lead oxide lead zinc powder
Answer Explanation

MCQs 14: The average charging voltage for alkali cell is about__________?

1 V 1.2 V 1.7 V 2.1 V
Answer Explanation

MCQs 15: The watt-hour efficiency of a lead-acid cell varies between________?

25 to 35% 40 to 60% 70 to 80% 90 to 95%
Answer Explanation

MCQs 16: Trickle charging of a storage battery helps to___________?

maintain proper electrolyte level increase its reserve capacity prevent sulphation keep it fresh and fully charged
Answer Explanation

MCQs 17: It is noticed that durum charging___________?

there is a rise in voltage energy is absorbed by the cell specific gravity of H2SO4 is increased the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb) all of the above
Answer Explanation

MCQs 18: As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?

compactness lower e.m.f. small quantity of electrolyte used higher internal resistance
Answer Explanation

MCQs 19: In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?

one part H2O, three parts H2SO4 two parts H2O, two parts H2SO4 three parts H2O, one part H2SO4 all H2S04
Answer Explanation

MCQs 20: It is noticed that during discharging the following does not happen___________?

both anode and cathode become PbS04 specific gravity of H2SO4 decreases voltage of the cell decreases the cell absorbs energy
Answer Explanation

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