Electrical Engineering MCQs

Page No. 208

Cells are connected in series in order to_____________?


aincrease the voltage rating


bincrease the current rating


c increase the life of the cells


d none of the above



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


aoutput voltage


b temperature of electrolyte


cspecific gravity of electrolyte


dnone of the above



The output voltage of a charger is__________?


a less than the battery voltage


b higher than the battery voltage


cthe same as the battery voltage


d none of the above



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


ajust one


balways greater than one


calways less than one


dnone of the above



The storage battery generally used in electric power station is__________?


anickel-cadmium battery


bzinc-carbon battery


clead-acid battery


d none of the above


View Answer lead-acid battery

During the charging of a lead-acid cell__________?


aits voltage increases


bit gives out energy


c its cathode becomes dark chocolate brown in colour


dspecific gravity of H2SO4 decreases


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


blead sulphate and lead


c lead peroxide and lead


dnone of the above



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


atemperature


brate of charge


crate of discharge


dquantity of active material


View Answer rate of charge

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


atime


bFaraday’s


cBoltzman


dAll of the above


View Answer Faraday’s

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


adark grey


bbrown


cdark brown


dnone of above


View Answer dark brown

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