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MCQs

Total Questions : 236 | Page 7 of 24 pages
Question 61. Electrolyte used in an Edison cell is
  1.    NaOH
  2.    kOH
  3.    HC1
  4.    HN03
 Discuss Question
Answer: Option B. -> kOH
Question 62. Life of the batteries is in the following ascending order.
  1.    Lead-acid cell, Edison cell, Nickel cadmium cell
  2.    Lead-acid cell, Nickel-cadmium cell, Edison cell
  3.    Edison cell, Nickel-cadmium cell, lead-acid cell
  4.    Nickel-cadmium cell, Edison cell, lead-acid cell
 Discuss Question
Answer: Option A. -> Lead-acid cell, Edison cell, Nickel cadmium cell
Question 63. Mercury cell has which of the following characteristics?
  1.    Flat discharge current-voltage curve
  2.    High power to weight ratio
  3.    Comparatively longer shelf life under adverse conditions of high temperature and humidity
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 64. Following will happen if battery charging rate is too high
  1.    excessive gassing will occur
  2.    temperature rise will occur
  3.    bulging and buckling of plates will occur
  4.    all above will occur
 Discuss Question
Answer: Option D. -> all above will occur
Question 65. Negative plate of an Edison cell is made of
  1.    copper
  2.    lead
  3.    iron
  4.    silver oxide
 Discuss Question
Answer: Option C. -> iron
Question 66. The body of Edison cell is made of
  1.    bakelite
  2.    rubber
  3.    nickel plated steel
  4.    aluminium
 Discuss Question
Answer: Option C. -> nickel plated steel
Question 67. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
  1.    compactness
  2.    lower e.m.f.
  3.    small quantity of electrolyte used
  4.    higher internal resistance
 Discuss Question
Answer: Option D. -> higher internal resistance
Question 68. Dry cell is modification of
  1.    Deniell cell
  2.    Leclanche cell
  3.    Lead-acid cell
  4.    Edison cell
 Discuss Question
Answer: Option B. -> Leclanche cell
Question 69. The active materials of a nickel-iron battery are
  1.    nickel hydroxide
  2.    powdered iron and its oxide
  3.    21% solution of kOH
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 70. In alkaline cell the electrolyte is
  1.    dilute sulphuric acid
  2.    concentrated sulphuric acid
  3.    NaOH
  4.    kOH
 Discuss Question
Answer: Option D. -> kOH

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