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MCQs

Total Questions : 236 | Page 21 of 24 pages
Question 201. Excessive charging a battery tends to
  1.    increase the internal resistance of the battery
  2.    bring about all above changes
  3.    produce gassing
  4.    to corrode the positive plates into lead peroxide thereby weakening them physically
 Discuss Question
Answer: Option B. -> bring about all above changes
Question 202. During the charging and discharging of a nickel-iron cell
  1.    its e.m.f. remains constant
  2.    nickel hydroxide remains unsplit
  3.    corrosive fumes are produced
  4.    water is neither formed nor absorbed
 Discuss Question
Answer: Option D. -> water is neither formed nor absorbed
Question 203. Charging a sulphated battery at high rate results in
  1.    All of the listed here
  2.    warping of plates
  3.    damage to separators, cell caps covers and battery case due to excessive temperature
  4.    boiling of electrolyte due to gassing
 Discuss Question
Answer: Option A. -> All of the listed here
Question 204. As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of
  1.    reducing time of charging
  2.    Both of the listed here
  3.    avoiding excessive gassing
  4.    increasing cell capacity
 Discuss Question
Answer: Option B. -> Both of the listed here
Question 205. During the idle period of the battery, strong electrolyte tends to change the active material of the cell into
  1.    Pb02
  2.    Pb
  3.    PbO
  4.    PbSC-4
 Discuss Question
Answer: Option D. -> PbSC-4
Question 206. Electrolyte used in an Edison cell is
  1.    kOH
  2.    NaOH
  3.    HN03
  4.    HC1
 Discuss Question
Answer: Option A. -> kOH
Question 207. Following will happen if battery charging rate is too high
  1.    temperature rise will occur
  2.    all of the listed here
  3.    bulging and buckling of plates will occur
  4.    excessive gassing will occur
 Discuss Question
Answer: Option B. -> all of the listed here
Question 208. Negative plate of an Edison cell is made of
  1.    copper
  2.    iron
  3.    silver oxide
  4.    lead
 Discuss Question
Answer: Option B. -> iron
Question 209. Life of the batteries is in the following ascending order.
  1.    Edison cell, Nickel-cadmium cell, lead-acid cell
  2.    Lead-acid cell, Nickel-cadmium cell, Edison cell
  3.    Nickel-cadmium cell, Edison cell, lead-acid cell
  4.    Lead-acid cell, Edison cell, Nickel cadmium cell
 Discuss Question
Answer: Option D. -> Lead-acid cell, Edison cell, Nickel cadmium cell
Question 210. Mercury cell has which of the following characteristics?
  1.    Comparatively longer shelf life under adverse conditions of high temperature and humidity
  2.    High power to weight ratio
  3.    All of these
  4.    Flat discharge current-voltage curve
 Discuss Question
Answer: Option C. -> All of these

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