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Electrical Engineering

Electrolysis And Storage Of Batteries MCQs

Practice Electrolysis And Storage Of Batteries MCQs for competitive exams.

Electrolysis And Storage Of Batteries MCQs

Practice questions from this topic.

The e.m.f. of an Edison cell, when fully charged, is nearly

  1. A. 1.4 V
  2. B. 1 V
  3. C. 0.9 V
  4. D. 0.8 V
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The capacity of a battery is expressed in terms of

  1. A. current rating
  2. B. voltage rating
  3. C. ampere-hour rating
  4. D. none of the above
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It is noticed that during discharging the following does not happen

  1. A. Both anode and cathode become PbSO 4
  2. B. Specific gravity of H 2 SO 4 decreases
  3. C. Voltage of the cell decreases
  4. D. The cell absorbs energy
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Hydrogen evolved during charging produces explosive mixture when it is more than

  1. A. 2%
  2. B. 4%
  3. C. 6%
  4. D. 8%
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All the electrical connections between the battery and vehicle should be by

  1. A. thin aluminium wires
  2. B. thin copper wires
  3. C. rigid cables
  4. D. flexible cables
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Undercharging

  1. A. Reduces specific gravity of the electrolyte
  2. B. Increases specific gravity of the electrolyte
  3. C. Produces excessive gassing
  4. D. Increases the temperature
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When a lead-acid battery is in fully charged condition, the color of its positive plate is

  1. A. dark grey
  2. B. brown
  3. C. dark brown
  4. D. none of above
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In a lead-acid battery the energy is stored in the form of

  1. A. charged ions
  2. B. chemical energy
  3. C. electrostatic energy
  4. D. electromagnetic energy
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Which of the following primary cells has the lowest voltage ?

  1. A. Lithium
  2. B. Zinc-chloride
  3. C. Mercury
  4. D. Carbon-zinc
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Capacity of a battery.is expressed in

  1. A. Ah
  2. B. Vh
  3. C. Wh
  4. D. kWh
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Local action in a battery is indicated by

  1. A. excessive gassing under load conditions
  2. B. excessive drop in the specific gravity of electrolyte even when the cell is on open circuit
  3. C. both (A) and (B) D. none of the above
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Specific gravity of electrolyte in Edison cell is

  1. A. 0.8
  2. B. 0.95
  3. C. 1.1
  4. D. 1.21
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