180 Important Electrolysis and Storage Batteries MCQ Question and Answer | PDF Free Download
1.In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3
- A6 parts of acid to 4 parts of water
- B4 parts of acid to 4 parts of water
- C4 parts of acid to 6 parts of water
- D4 parts of acid to 8 parts of water
2.Capacity of dry cells is
- AMore when it is supplying current for intermittent periods
- BMore when it is supplying current for continuous periods
- CUnaffected by the type of discharge
- DNone of the above
3.Local action in a battery is indicated by
- AExcessive gassing under load conditions
- BExcessive drop in the specific gravity of electrolyte even when the cell is an open circuit
- CBoth (a) and (b)
- DNone of the above
4.Following will happen if battery charging rate is too high
- AExcessive gassing will occur
- BTemperature rises will occur
- CBulging and bucking of plates will occurs
- DAll above will occur
5.Internal resistance of a cell is due to
- AResistance of electrolyte
- BElectrode resistance
- CSurface contact resistance between electrode and electrolyte
- DAll above
6.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
7.In order that a hydrometer may float vertically in electrolyte its C.G. should be
- ALowered
- BRaised
- CUndisturbed
- DDisplaced sideways
8.If a lead-acid cell is discharged below 1.8 V the following will happen.
- ACapacity of cell will reduce
- BSulphation of plates will occur
- CInternal resistance will increase
- DAll above will occur
9.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
10.Persons preparing electrolyte should wear
- AGoggles or other face shield
- BRubber
- CRubber boots and gloves
- DAll above safety devices
11.Excessive charging a battery tends to
- AProduce gassing
- BIncrease the internal resistance of the battery
- CTo corrode the positive plates into lead peroxide thereby weakening them physically
- DBring about all above changes
12.Shelf life 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
13.The current flow through electrolyte is due to the movement of
- AIons
- BHoles
- CElectrons
- DNone of the above
14.Level of electrolyte in a cell should be ___________ the level of plates
- ABelow
- BEqual to
- CAbove
- DNone of the above
15.Proper charging rate of a battery in ampere is about __________ of its ampere-hour capacity
- A1/8
- B1/6
- C1/4
- D1/2
16.__________ of electrolyte indicates the state of charge of the battery
- AColour
- BMass
- CViscosity
- DSpecific gravity
17.The following indicates that the battery on charge has attained full charge
- AColour of electrode
- BGassing
- CSpecific gravity
- DAll above
18.If the e.m.f of a cell is 2 V, internal resistance 0.2 ohm and external resistance 0.8 ohm then the current delivered will be
- A0.5 A
- B1 A
- C1.5 A
- D2 A
19.Dry cell is modification of
- ADeniell cell
- BLeclanche cell
- CLead-acid cell
- DEdison cell