Electrolysis and storage of batteries

[amp_mcq option1=”Lithium” option2=”Zinc-chloride” option3=”Mercury” option4=”Carbon-zinc” correct=”option4″]

Detailed SolutionWhich of the following primary cells has the lowest voltage ?

[amp_mcq option1=”Rate of discharge” option2=”Temperature” option3=”Density of electrolyte” option4=”All above” correct=”option4″]

Detailed SolutionThe capacity of a lead-acid cell depends on

[amp_mcq option1=”breakdown of one or more separators” option2=”excess accumulation of sediment at the bottom of the cell” option3=”both (A) and (B)” option4=”none of the above” correct=”option3″]

Detailed SolutionInternal short circuits are caused by

[amp_mcq option1=”produce gassing” option2=”increase the internal resistance of the battery” option3=”to corrode the positive plates into lead peroxide thereby weakening them physically” option4=”bring about all above changes” correct=”option4″]

Detailed SolutionExcessive charging a battery tends to

[amp_mcq option1=”using vent plug to permit gas formed during discharge” option2=”increasing the plate area” option3=”putting plates very close together” option4=”all above methods” correct=”option4″]

Detailed SolutionInternal resistance of a cell is reduced by

[amp_mcq option1=”colour of electrode” option2=”gassing” option3=”specific gravity” option4=”all above” correct=”option4″]

Detailed SolutionThe following indicate that battery on charge has attained full charge

[amp_mcq option1=”Pb” option2=”PbO2″ option3=”PbO” option4=”PbSO4″ correct=”option4″]

Detailed SolutionDuring discharge, the active material of both the positive and negative plates is changed to

[amp_mcq option1=”two rate charge control” option2=”trickle charge” option3=”floating charge” option4=”an equalizing charge” correct=”option1″]

Detailed SolutionIn ______ system the charging current is intermittently controlled at either a maximum or minimum value

[amp_mcq option1=”increases” option2=”decreases” option3=”remains same” option4=”none of the above” correct=”option1″]

Detailed SolutionThe effect of sulphation is that the internal resistance

[amp_mcq option1=”decreases” option2=”increases” option3=”remains constant” option4=”none of the above” correct=”option1″]

Detailed SolutionIn constant voltage charging method, the charging current from discharged to fully charged condition