Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-PowerMCQ-Illumination

Multiple Choice Question (MCQ) of Battery page-5


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41. The capacity of storage battery is expressed as

A) ampere hour it can deliver
B) the number of cells it contains
C) time for which it can be used
D) the number of recharges it can take.

Ans : (A)

42. Open circuit voltage of a fully charged lead acid cell is

A) 2.5 V
B) 2.0 V
C) 1.9 V
D) 2.7 V.

Ans : (D)

43. Common impurity in battery electrolyte is

A) iron
B) dust
C) lead sulphate
D) sodium chloride.

Ans : (A)

44. The indication of the state of charge of a battery is best given by

A) level of electrolyte
B) colour of electrolyte
C) temperature of electrolyte
D) specific gravity of electrolyte.

Ans : (D)

45. Which of the following statement is not correct?

A) Leclanche cell is used in experiments, where constant supply of current is not needed.
B) Dry cell is a primary cell
C) After charging, a primary cell can be again put to use
D) A primary cell is an electrochemical cell.

Ans : (C)

46. The current in a chemical cell is a movement of

A) positive hole charges
B) positive ions only
C) negative ions only
D) positive and negative ions.

Ans : (D)

47. Which of the following is false?

A) A primary cell has an irreversible chemical reaction
B) A storage cell has an reversible chemical reaction
C) A lead acid cell can be recharged
D) A carbon zinc cell has unlimited shelf life.

Ans : (D)

48. A constant voltage source has

A) minimum current capacity
B) minimum efficiency
C) high internal resistance
D) low internal resistance.

Ans : (D)

49. For a voltage source when internal resistance is equal to-load resistance, RL, which of the following is maximum?

A) Efficiency of the circuit
B) Current
C) Voltage across RL
D) Power in RL.

Ans : (D)

50. A lead acid battery discharges at the rate of 8 A for 10 hours. How many coulombs of charge must be put back into the battery to restore the original charge assuming 50 % efficiency?

A) 1.44 × 105 C
B) 8.88 × 105 C
C) 5.76 × 105 C
D) 2.38 × 105 C.

Ans : (C)


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