Electrical Engineering MCQs

Page No. 202

Sulphated cells are indicated by____________?


athe loss of capacity of the cell


bthe decrease of the specific gravity


cthe low voltage of the cell on discharge


dall above conditions


View Answer all above conditions

Internal resistance of a cell is reduced by__________?


ausing vent plug to permit gas formed during discharge


b increasing the plate area


cputting plates very close together


dall above methods


View Answer all above methods

Battery container should be acid resistance, therefore it is made up of___________?


aGlass


bplastic


cwood


dall above


View Answer all above

Following will happen if battery charging rate is too high______________?


a excessive gassing will occur


b temperature rise will occur


cbulging and buckling of plates will occur


dall above will occur


View Answer all above will occur

During discharge, the active material of both the positive and negative plates is changed to___________?


aPb


b Pb02


cPbO


d PbS04


View Answer PbS04

Persons preparing electrolyte should wear___________?


agoggles or other face shield


brubber


crubber boots and gloves


dall above safety devices



The current flow through electrolyte is due to the movement of____________?


aions


bholes


celectrons


dnone of the above


View Answer ions

If a battery is wrongly connected on charge following will happen__________?


acurrent delivered by the battery will be high


bcurrent drawing will be nil


ccurrent drawing will be very small


dcurrent drawing will be very high



Life of the batteries is in the following ascending order____________?


aLead-acid cell, Edison cell, Nickel cadmium cell


bLead-acid cell, Nickel-cadmium cell, Edison cell


cEdison cell, Nickel-cadmium cell, lead-acid cell


dNickel-cadmium cell, Edison cell, lead-acid cell



Shelf life of a small dry cell is___________?


aequal to that of large dry cell


bless than that of large dry cell


cmore than that of large dry cell


dnone of the above



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