Electrolysis and Storage Batteries MCQs

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It is not desirable to leave a lead storage battery in a discharged state for a long time mainly because

  • A. electrolyte will attack the container
  • B. plates will become sulphated
  • C. electrolyte will become weak
  • D. acid will evaporate
  • Correct Answer: Option B

The internal resistance of a discharged battery compared with a charged one

  • A. is more
  • B. is less
  • C. remains the same
  • D. is negative
  • Correct Answer: Option C

To keep the terminals of a lead acid storage battery free from corrosion, it is advisable to

  • A. clean the terminals frequently
  • B. charge for the battery at frequent intervals
  • C. keep the electrolyte level low
  • D. apply petroleum jelly
  • Correct Answer: Option D

The ampere hour capacity of battery depends on

  • A. the thickness of the plates
  • B. the area of the plates
  • C. the strength of the electrolytes
  • D. the distance between the plates
  • Correct Answer: Option B

When the electrolyte of a storage battery is low it is usually proper to

  • A. add a special weak acid solution
  • B. top up with distilled water
  • C. charge the battery for a short time before adding an electrolyte
  • D. drain battery completely and fill it with fresh electrolyte
  • Correct Answer: Option B

Electrolyte of a strong battery is formed by adding

  • A. water to hydrochloric acid
  • B. sulphuric acid to water
  • C. hydrochloric acid to water
  • D. water to sulphuric acid
  • Correct Answer: Option B

Other types of accumulators besides the lead acid type are

  • A. alkaline batteries only
  • B. alkaline and solar batteries
  • C. alkaline and dry batteries
  • D. nickel-cadmium batteries
  • Correct Answer: Option D

The lead acid accumulator should be recharged when the specific gravity of the electrolyte is about

  • A. 1.15
  • B. 1.80
  • C. 1.25
  • D. 1.35
  • Correct Answer: Option A

The condition of a secondary cell can be determined by

  • A. its terminal voltage
  • B. the color of the electrolyte
  • C. the level of the electrolyte
  • D. the terminal voltage and strength of the electrolyte
  • Correct Answer: Option C

Gassing occurs in the process of

  • A. charging an accumulator
  • B. charging a dry cell
  • C. discharging an accumulator
  • D. discharging a dry cell
  • Correct Answer: Option A