ELECTROLYSIS AND STORAGE BATTERIES QUIZ

Each cell has a vent cap

to allow gases out when the cell is on charge

to check the level of electrolyte

to add water to the cell if needed

all of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

In order that a hydrometer may float vertically in electrolyte its C.G. should be

displaced sideways

raised

lowered

undisturbed

TRUE ANSWER : ?
YOUR ANSWER : ?

The common impurity in the electrolyte of lead-acid battery is

lead crystals

chlorine

iron

dust particles

TRUE ANSWER : ?
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During the idle period of the battery, strong electrolyte tends to change the active material of the cell into

PbO

Pb

PbSC-4

Pb02

TRUE ANSWER : ?
YOUR ANSWER : ?

On the average the ampere-hour efficiency of an Edison cell is about

0.7

0.6

0.8

0.4

TRUE ANSWER : ?
YOUR ANSWER : ?

The storage battery generally used in electric power station is

nickel-cadmium battery

none of the listed here

zinc-carbon battery

lead-acid battery

TRUE ANSWER : ?
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Excessive formation of lead sulphate on the surface of the plates happens because of

persistent undercharging

allowing a battery to stand in discharged condition for a long time

low level of electrolyte

all of the listed here

TRUE ANSWER : ?
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Internal short circuits are caused by

excess accumulation of sediment at the bottom of the cell

both of the options given here

none of the listed here

breakdown of one or more separators

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The effect of sulphation is that the internal resistance

remains same

none of the listed here

increases

decreases

TRUE ANSWER : ?
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Capacity of dry cells is

more when it is supplying current for continuous periods

None of these

unaffected by the type of discharge

more when it is supplying current for intermittent periods

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