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MCQs

Total Questions : 236 | Page 22 of 24 pages
Question 211. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
  1.    lower e.m.f.
  2.    compactness
  3.    small quantity of electrolyte used
  4.    higher internal resistance
 Discuss Question
Answer: Option D. -> higher internal resistance
Question 212. The active materials of a nickel-iron battery are
  1.    21% solution of kOH
  2.    powdered iron and its oxide
  3.    nickel hydroxide
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 213. The body of Edison cell is made of
  1.    rubber
  2.    aluminium
  3.    bakelite
  4.    nickel plated steel
 Discuss Question
Answer: Option D. -> nickel plated steel
Question 214. Dry cell is modification of
  1.    Deniell cell
  2.    Leclanche cell
  3.    Edison cell
  4.    Lead-acid cell
 Discuss Question
Answer: Option B. -> Leclanche cell
Question 215. In alkaline cell the electrolyte is
  1.    kOH
  2.    NaOH
  3.    concentrated sulphuric acid
  4.    dilute sulphuric acid
 Discuss Question
Answer: Option A. -> kOH
Question 216. The active materials on the positive and negative plates of a fully charged lead-acid battery are
  1.    None of these
  2.    lead sulphate and lead
  3.    lead peroxide and lead
  4.    lead and lead peroxide
 Discuss Question
Answer: Option C. -> lead peroxide and lead
Question 217. Following will occur if level of electrolyte falls below plates
  1.    capacity of the cell is reduced
  2.    all of these
  3.    life of the cell is reduced
  4.    open plates are converted to lead sulphate
 Discuss Question
Answer: Option B. -> all of these
Question 218. The current flow through electrolyte is due to the movement of
  1.    holes
  2.    ions
  3.    electrons
  4.    None of these
 Discuss Question
Answer: Option B. -> ions
Question 219. In order that a hydrometer may float vertically in electrolyte its C.G. should be
  1.    raised
  2.    undisturbed
  3.    displaced sideways
  4.    lowered
 Discuss Question
Answer: Option D. -> lowered
Question 220. Which of the following factors adversely affects the capacity of the leadacid battery ?
  1.    All of these
  2.    Rate of discharge
  3.    Specific gravity of electrolyte
  4.    Temperature of surroundings
 Discuss Question
Answer: Option A. -> All of these

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