Electrolysis and storage of batteries

1. Capacity of a battery.is expressed in

Ah
Vh
Wh
kWh

Detailed SolutionCapacity of a battery.is expressed in

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

dark grey
brown
dark brown
none of above

Detailed SolutionWhen a lead-acid battery is in fully charged condition, the color of its positive plate is

3. Batteries are charged by

rectifiers
engine generator sets
motor generator sets
any one of the above methods

Detailed SolutionBatteries are charged by

4. Battery container should be acid resistance, therefore it is made up of

glass
plastic
wood
all above

Detailed SolutionBattery container should be acid resistance, therefore it is made up of

5. If a battery is wrongly connected on charge following will happen

current delivered by the battery will be high
current drawing will be nil
current drawing will be very small
current drawing will be very high

Detailed SolutionIf a battery is wrongly connected on charge following will happen

6. When the lead-acid cell is fully charged, the electrolyte assumes _____ appearance

dull
reddish
bright
milky

Detailed SolutionWhen the lead-acid cell is fully charged, the electrolyte assumes _____ appearance

7. Mercury cell has which of the following characteristics?

Flat discharge current-voltage curve
High power to weight ratio
Comparatively longer shelf life under adverse conditions of high temperature and humidity
All of the above

Detailed SolutionMercury cell has which of the following characteristics?

8. Life of the batteries is in the following ascending order.

Lead-acid cell, Edison cell, Nickel cadmium cell
Lead-acid cell, Nickel-cadmium cell, Edison cell
Edison cell, Nickel-cadmium cell, lead-acid cell
Nickel-cadmium cell, Edison cell, lead-acid cell

Detailed SolutionLife of the batteries is in the following ascending order.

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

lowered
raised
undisturbed
displaced sideways

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

10. Over charging

produces excessive gassing
loosens the active material
increases the temperature resulting in buckling of plates
all above

Detailed SolutionOver charging

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