180 Important Electrolysis and Storage Batteries MCQ Question and Answer | PDF Free Download
1.The efficiency of a nickel-iron cell is less as compared to a lead-acid cell due to its
- ACompactness
- BLower e.m.f
- CSmaller quantity of electrolyte used
- DHigher internal resistance
2.Trickle charging of a storage battery helps to
- AMaintain proper electrolyte level
- BIncrease its reserve capacity
- CPrevent sulphation
- DKeep it fresh and fully charged
3.Those substance of the cell which take active parts in chemical combination and hence produce electricity during charging and discharging are known as _________ materials
- APassive
- BActive
- CRedundant
- DInert
4.The ampere-hour efficiency of a lead-acid cell is normally between
- A20 to 30 %
- B40 to 50 %
- C60 to 70 %
- D90 to 95 %
5.The watt-hour efficiency of a lead-acid cell varies between
- A25 to 35 %
- B40 to 60 %
- C70 to 80 %
- D90 to 95 %
6.The capacity of a lead acid cell measured in
- AAmperes
- BAmperes-hours
- CWatts
- DWatt-hours
7.When the lead acid cell is fully charged the electrolytes assumes _________ appearance
- ADull
- BReddish
- CBright
- DMilky
8.The EMF of an Edison cell, when fully charged is nearly
- A1.4 V
- B1 V
- C0.9 V
- D0.8 V
9.The internal resistance of an alkali cell is nearly ___________ times that of the lead-acid cell
- ATwo
- BThree
- CFour
- DFive
10.The average charging voltage for alkali cell is about
- A1 V
- B1.2 V
- C1.7 V
- D2.1 V
11.On the average, the ampere-hour efficiency of an Edison cell is about
- A40 %
- B60 %
- C70 %
- D80 %
12.The active material of the positive plates of silver-zinc batteries is
- ASilver oxide
- BLead oxide
- CLead
- DZinc powder
13.Lead-acid cell has a life of nearly ________ charges and discharges
- A500
- B700
- C1000
- D1250
14.Life of the Edison cell is at least
- AFive years
- BSeven years
- CEight years
- DTen years
15.The internal resistance of a lead-acid cell is ___________ that of Edison cell
- ALess than
- BMore than
- CEqual to
- DNone of the above
16.Negative plate of an Edison cell is made of
- ACopper
- BLead
- CIron
- DSilver oxide
17.The open circuit voltage of any storage cell depends on
- AIts chemical constituents
- BOn the strength of its electrolyte
- CIts temperature
- DAll above
18.The specific gravity of electrolyte is measured by
- AManometer
- BA mechanical gauge
- CHydrometer
- DPsychomotor
19.When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell in
- ACharged state
- BDischarged state
- CBoth (a) and (b)
- DActive state
20.In __________ system the charging current is intermittently controlled at either a maximum or minimum value
- ATwo rate charge control
- BTrickle charge
- CFloating charge
- DAn equalizing charge