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MCQs

Total Questions : 236 | Page 2 of 24 pages
Question 11. Which of the following cell has a reversible chemical reaction ?
  1.    Lead-acid
  2.    Mercury oxide
  3.    Carbon-zinc
  4.    Silver-oxide
 Discuss Question
Answer: Option A. -> Lead-acid
Question 12. The open circuit voltage of any storage cell depends wholly upon
  1.    its chemical constituents
  2.    on the strength of its electrolyte
  3.    its temperature
  4.    all above
 Discuss Question
Answer: Option D. -> all above
Question 13. Battery charging equipment is generally installed
  1.    In well ventilated location
  2.    In clean and dry place
  3.    As near as practical to the battery being charged
  4.    In location having all above features
 Discuss Question
Answer: Option D. -> In location having all above features
Question 14. The ampere-hour efficiency of a leadacid cell is normally between
  1.    20 to 30%
  2.    40 to 50%
  3.    60 to 70%
  4.    90 to 95%
 Discuss Question
Answer: Option D. -> 90 to 95%
Question 15. The effect of sulphation is that the internal resistance
  1.    increases
  2.    decreases
  3.    remains same
  4.    none of the above
 Discuss Question
Answer: Option A. -> increases
Question 16. Satellite power requirement is provided through
  1.    solar cells
  2.    dry cells
  3.    nickel-cadmium cells
  4.    lead-acid batteries
 Discuss Question
Answer: Option A. -> solar cells
Question 17. Internal resistance of a cell is due to
  1.    resistance of electrolyte
  2.    electrode resistance
  3.    surface contact resistance between electrode and electrolyte
  4.    all above
 Discuss Question
Answer: Option D. -> all above
Question 18. Which of the following has lower sp. gravity V
  1.    Dilute H₂SO₄
  2.    Concentrated H₂SO₄
  3.    Water
  4.    Any of the above
 Discuss Question
Answer: Option C. -> Water
Question 19. During the charging of a lead-acid cell
  1.    its voltage increases
  2.    it gives out energy
  3.    its cathode becomes dark chocolate brown in colour
  4.    specific gravity of H₂SO₄ decreases
 Discuss Question
Answer: Option A. -> its voltage increases
Question 20. Chargmg of sulphated battery produces ____ heat.
  1.    no
  2.    very little
  3.    less
  4.    more
 Discuss Question
Answer: Option D. -> more

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