Electrical Engineering MCQs

Page No. 208

Cells are connected in series in order to_____________?


aincrease the voltage rating

✓


bincrease the current rating

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c increase the life of the cells

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d none of the above

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


aoutput voltage

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b temperature of electrolyte

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cspecific gravity of electrolyte

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dnone of the above

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The output voltage of a charger is__________?


a less than the battery voltage

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b higher than the battery voltage

✓


cthe same as the battery voltage

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d none of the above

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


ajust one

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balways greater than one

✓


calways less than one

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dnone of the above

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The storage battery generally used in electric power station is__________?


anickel-cadmium battery

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bzinc-carbon battery

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clead-acid battery

✓


d none of the above

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View Answer lead-acid battery

During the charging of a lead-acid cell__________?


aits voltage increases

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bit gives out energy

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c its cathode becomes dark chocolate brown in colour

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dspecific gravity of H2SO4 decreases

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View Answer its voltage increases

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


alead and lead peroxide

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blead sulphate and lead

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c lead peroxide and lead

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dnone of the above

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


atemperature

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brate of charge

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crate of discharge

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dquantity of active material

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View Answer rate of charge

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


atime

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bFaraday’s

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cBoltzman

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dAll of the above

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View Answer Faraday’s

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


adark grey

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bbrown

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cdark brown

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dnone of above

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View Answer dark brown

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