180 Important Electrolysis and Storage Batteries MCQ Question and Answer | PDF Free Download
1.?The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity?.The above statement is associated with
- ANewton?s law
- BFaraday?s law of electromagnetic induction
- CFaraday?s law of electrolysis
- DGauss?s law
2.The charge required to liberate one-gram equivalent of any substance is known as ________ constant
- ATime
- BFaraday?s
- CBoltzmann
- DFaraday?s and Boltzmann
3.The capacity of a cell is measured in
- AAmperes
- BAmpere - hour
- CWatts
- DWatt ? hours
4.Active materials of a lead acid cell are
- ASpongy lead
- BLead peroxide
- CDilute sulfuric acid
- DAll of the above
5.Sulphation in a lead-acid battery occurs due to
- AHeavy charging
- BFast charging
- CTrickle charging
- DIncomplete charging
6.The capacity of lead-acid cell does not depend on its
- ATemperature
- BRate of charge
- CRate of discharge
- DQuantity of active materials
7.During charging the specific gravity of the electrolyte of a lead-acid battery
- AIncreases
- BDecreases
- CRemains the same
- DBecomes zero
8.The active materials on the positive and negative plates of a fully charged lead-acid battery are
- ALead and lead peroxide
- BLead sulphate and lead
- CLead peroxide and lead
- DNone of the above
9.When a lead-acid battery is in fully charged condition, the colour of its positive plate is
- ADark grey
- BBrown
- CDark brown
- DNone of the above
10.The active materials of nickel-iron battery are
- ANickel hydroxide
- BPowered iron and its oxide
- C21 % solution of KOH
- DAll of the above
11.The value of specific Gravity of acid when a lead-acid battery is fully charged is
- A1.1
- B1.15
- C1.25
- D1.285
12.The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
- AJust one
- BAlways greater than one
- CAlways less than one
- DNone of the above
13.The best indication about the state of charge on a lead-acid battery is given by
- AOutput voltage
- BTemperature of electrolyte
- CSpecific gravity of electrolytes
- DNone of the above
14.The storage battery generally used in electric power station is
- ANickel cadmium battery
- BZinc-carbon battery
- CLead-acid battery
- DNone of the above
15.The output voltage of a charger is
- ALess than the battery voltage
- BHigher than the battery voltage
- CThe same as the battery voltage
- DNone of the above
16.Cells are connected in series in order to
- AIncrease the voltage rating
- BIncrease the current rating
- CIncrease the life of the cells
- DNone of the above
17.Five 2 V cells are connected in parallel. The output voltage is
- A1 V
- B1.5 V
- C1.75 V
- D2 V
18.The capacity of a battery is expressed in terms of
- ACurrent rating
- BVoltage rating
- CAmpere-hour rating
- DNone of the above
19.During the charging and discharging of a nickel-iron cell
- ACorrosive fumes are produced
- BWater is neither formed nor absorbed
- CNickel hydroxide remains upsplits
- DIts e.m.f remains constant
20.As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
- AReducing time charging
- BIncreasing cell capacity
- CBoth (a0 and (b)
- DAvoiding excessive gassing