Electrical Engineering MCQs

Page No. 205

Lead-acid cell has a life of nearly charges and discharges______________?


a500

✖


b700

✖


c1000

✖


d1250

✓


View Answer 1250

Over charging______________?


aproduces excessive gassing

✖


b loosens the active material

✖


cincreases the temperature resulting in buckling of plates

✖


dall above

✓


View Answer all above

The open circuit voltage of any storage cell depends wholly upon___________?


aits chemical constituents

✖


bon the strength of its electrolyte

✖


cits temperature

✖


dall above

✓


View Answer all above

Electrolyte used in a lead-acid cell is__________?


aNaOH

✖


bonlyH2S04

✖


conly water

✖


ddilute H2SO4

✓


View Answer dilute H2SO4

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


acharged state

✖


bdischarged state

✓


cboth (A) and (B)

✖


dactive state

✖


View Answer discharged state

Negative plate of an Edison cell is made of__________?


acopper

✖


b lead

✖


ciron

✓


dsilver oxide

✖


View Answer iron

The specific gravity of electrolyte is measured by____________?


amanometer

✖


ba mechanical gauge

✖


chydrometer

✓


dpsychrometer

✖


View Answer hydrometer

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


aless than

✓


bmore than

✖


cequal to

✖


dnone of the above

✖


View Answer less than

Electrolyte used in an Edison cell is___________?


aNaOH

✖


bKOH

✓


cHC1

✖


d HN03

✖


View Answer KOH

Life of the Edison cell is at least_____________?


afive years

✓


bseven years

✖


ceight year

✖


dten years

✖


View Answer five years

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