180 Important Electrolysis and Storage Batteries MCQ Question and Answer | PDF Free Download
1.Over charging ____________
- AProduces excessive gassing
- BLoosens the active materials
- CIncreases the temperature resulting in bulking of plates
- DAll above
2.Undercharging _____________
- AReduces specific gravity of the electrolyte
- BIncreases specific gravity of the electrolyte
- CProduces excessive gassing
- DIncreases the temperature
3.Internal short circuits are caused by
- ABreakdown of one or more separators
- B Excess accumulation of sediment at the bottom of the cell
- CBoth (a) and (b)
- DNone of the above
4.The effect of sulphation is that the internal resistance
- AIncreases
- BDecreases
- CRemain same
- DNone of the above
5.The substances which combine together to store electrical energy during the charge are called __________ materials
- AActive
- BPassive
- CInert
- DDielectric
6.In a lead-acid cell, lead is called as
- APositive active material
- BNegative active material
- CPassive materials
- DNone of the above
7.The lead-acid cell should never be discharged beyond
- A1.8 V
- B1.9 V
- C2 V
- D2.1V
8.On overcharging a battery
- AIt will bring about chemical change in active materials
- BIt will increase the capacity of the battery
- CIt will raise the specific gravity of the electrolyte
- DNone of the above will occur
9.Each cell has a vent cap
- AAllow gases out when the cell is on charge
- BTo add water to the cell if needed
- CTo check the level of electrolyte
- DTo do all above functions
10.Following will occur if level of electrolyte falls below plates
- ACapacity of the cell is reduced
- BLife of the cell is reduced
- COpen plates are converted to lead sulphate
- DAll above
11.In constant-voltage charging method, the charging current from discharged to fully charged condition
- ADecreases
- BIncreases
- CRemains constant
- DNone of the above
12.48 Ampere-hour capacity would deliver a current of
- A48 Amperes for 1 hour
- B24 Amperes for 2 hours
- C8 Amperes for 6 hours
- D6 Amperes for 8 hours
13.In constant-current charging method, the supply voltage from discharged to fully charged condition
- ADecreases
- BIncreases
- CRemains constant
- DNone of the above
14.Battery charging equipment is generally installed
- AIn well ventilated location
- BIn clean and dry place
- CAs near as practical to the battery being charged
- DIn location having all above features
15.Following will happen if the specific gravity of electrolyte becomes more than 1.23
- ALoss of capacity
- BLoss of life
- CCorrosion of the grids of the plate
- DAll above
16.Batteries are charged by
- ARectifiers
- BEngine generators sets
- CMotor generators set
- DAny one of the above methods
17.Cell short circuits results in
- ALow sp. Gravity electrolyte
- BAbnormal high temperature
- CReduced gassing on charge
- DAll above
18.Internal resistance of a cell is reduced by
- AUsing vent plug to permit gas formed during discharge
- BIncreasing the plate area
- CPutting plates very close together
- DAll above methods
19.Battery container should be acid resistance, therefore it is made up of
- AGlass
- BPlastic
- CWood
- DAll above
20.Sulphated cells are indicated by
- AThe loss of the capacity of the cell
- BThe decrease of the specific gravity
- CThe low voltage of the cell on discharge
- DAll above conditions