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MCQs

Total Questions : 236 | Page 3 of 24 pages
Question 21. It is noticed that durum charging
  1.    there is a rise in voltage
  2.    energy is absorbed by the cell
  3.    specific gravity of H₂SO₄ is increased
  4.    the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)
  5.    all of the above
 Discuss Question
Answer: Option E. -> all of the above
Question 22. The internal resistance of a lead-acid cell is that of Edison cell
  1.    Less than
  2.    More than
  3.    Equal to
  4.    None of the above
 Discuss Question
Answer: Option A. -> Less than
Question 23. The internal resistance of an alkali cell is nearly _____ times that of the lead-acid cell.
  1.    two
  2.    three
  3.    four
  4.    five
 Discuss Question
Answer: Option D. -> five
Question 24. Level of electrolyte in a cell should be _____ the level of plates
  1.    below
  2.    equal to
  3.    above
  4.    none of the above
 Discuss Question
Answer: Option C. -> above
Question 25. Which of the following battery is used for aircraft ?
  1.    Lead-acid battery
  2.    Nickel-iron battery
  3.    Dry cell battery
  4.    Silver oxide battery
 Discuss Question
Answer: Option B. -> Nickel-iron battery
Question 26. For a cell to work, which of the following condition(s) become necessary ?
  1.    Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other
  2.    Electrolyte must chemically react with one of the electrodes
  3.    Electrolyte liquid or paste should be conducting
  4.    All above three conditions are necessary
 Discuss Question
Answer: Option D. -> All above three conditions are necessary
Question 27. Internal resistance of a cell is reduced by
  1.    using vent plug to permit gas formed during discharge
  2.    increasing the plate area
  3.    putting plates very close together
  4.    all above methods
 Discuss Question
Answer: Option D. -> all above methods
Question 28. The capacity of a lead-acid cell depends on
  1.    Rate of discharge
  2.    Temperature
  3.    Density of electrolyte
  4.    All above
 Discuss Question
Answer: Option D. -> All above
Question 29. Trickle charging of a storage battery helps to
  1.    maintain proper electrolyte level
  2.    increase its reserve capacity
  3.    prevent sulphation
  4.    keep it fresh and fully charged
 Discuss Question
Answer: Option D. -> keep it fresh and fully charged
Question 30. Short circuiting of a cell may be caused
  1.    buckling of plates
  2.    faulty separators
  3.    lead particles forming circuit between positive and negative plates
  4.    excessive accumulation of sediment
  5.    any one of above
 Discuss Question
Answer: Option E. -> any one of above

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