180 Important Electrolysis and Storage Batteries MCQ Question and Answer | PDF Free Download
1.For a cell to work, which of the following condition(s) become necessary ?
- ATwo electrodes of different metals should be inserted in the electrolyte, not touching each other
- BElectrolyte must chemically react with one of the electrodes
- CElectrolyte liquid or paste should be conducting
- DAll above three conditions are necessary
2.Which of the following primary cell has the lowest voltage?
- ALithium
- BZinc-chloride
- CMercury
- DCarbon-zinc
3.Which of the following primary cells has the highest voltage?
- AManganese voltage
- BCarbon-zinc
- CLithium
- DMercury
4.While preparing electrolyte for lead-acid battery
- AWater is poured into acid
- BAcid is poured into water
- CAnyone of the two can be added to other chemical
- DNone of the above
5.Which of the following battery is used for air-craft?
- ALead-acid battery
- BNickel-iron battery
- CDry cell battery
- DSilver oxide battery
6.Which of the following cell has a reversible chemical reaction?
- ALead-acid
- BMercury oxide
- CCarbon-zinc
- DSilver-oxide
7.Which of the following is incorrect?
- AA short cell has a reversible chemical reaction
- BA lead-cell can be recharged
- CA carbon-zinc cell has an irreversible chemical reaction
- DA primary cell has an irreversible chemical reaction
8.The internal resistance of a dry cell is of order of
- A0.01 to 0.04 ohm
- B0.2 to 0.5 ohm
- C2 to 5 ohm
- D10 to 30 ohm
9.Under normal charging rate, the charging current should be
- A10 % of capacity
- B28 % of capacity
- C30 % of capacity
- D40 % of capacity
10.When two batteries are connected in parallel, it should be ensure that
- AThey have same of e.m.f
- BThey have same make
- CThey have same ampere-hour capacity
- DThey have identical internal resistance
12.Petroleum is applied to the electrical connections the lead-acid battery to
- APrevent local heating
- BPrevent short circuiting
- CReduce path resistance
- DPrevent corrosion
13.When the load resistance equals the generator resistance which of the following will be maximum?
- ACurrent
- BEfficiency of the circuit
- CPower in the load resistance
- DVoltage across the load resistance
14.The common impurity in the electrolyte of a lead-acid battery is
- AChlorine
- BDust particle
- CLead crystals
- DIron
15.What is the reasonable value of the current that can be continuously drawn from a 120 ampere-hour capacity lead-acid cell?
- A2 A
- B20 A
- C40 A
- D70 A
16.In a lead acid battery the energy is stored in the form of
- ACharged iron
- BChemical energy
- CElectrostatic energy
- DElectromagnetic energy
17.Which among the following constitute the major load of an automobile battery?
- ABrake light
- BSelf-starter
- CParking light
- DSpark plug
18.Which of the following factor adversely affects the capacity of the lead acid battery?
- ATemperature of surroundings
- BSpecific gravity of electrolyte
- CRate of discharge
- DAll of the above
19.Cells are connected in parallel to
- AIncrease the efficiency
- BIncrease the current capacity
- CIncrease the voltage output
- DIncrease the internal resistance
20.The current in a chemical cell is movement of
- APositive ions
- BPositive and negative ions
- CNegative ions only
- DPositive-hole charges