The ampere-hour efficiency of a lead acid cell is normally between_________? A. 20 to 30% B. 40 to 50% C. 60 to 70%D. 90 to 95%

When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance A. dull B. reddish C. brightD. milky

The active material of the positive plates of silver-zinc batteries is_________? A. silver oxide B. lead oxide C. lead D. zinc powder

The average charging voltage for alkali cell is about__________? A. 1 V B. 1.2 VC. 1.7 V D. 2.1 V

The watt-hour efficiency of a lead-acid cell varies between________? A. 25 to 35% B. 40 to 60%C. 70 to 80% D. 90 to 95%

Trickle charging of a storage battery helps to___________? A. maintain proper electrolyte level B. increase its reserve capacity C. prevent sulphationD. keep it fresh and fully charged

It is noticed that durum charging___________? A. there is a rise in voltage B. energy is absorbed by the cell C. specific gravity of H2SO4 is increased D. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey…

As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________? A. compactness B. lower e.m.f. C. small quantity of electrolyte usedD. higher internal resistance

In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________? A. one part H2O, three parts H2SO4 B. two parts H2O, two parts H2SO4C. three parts H2O, one part H2SO4 D. all H2S04

It is noticed that during discharging the following does not happen___________? A. both anode and cathode become PbS04 B. specific gravity of H2SO4 decreases C. voltage of the cell decreases D. the cell absorbs energy