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MCQs

Total Questions : 236 | Page 18 of 24 pages
Question 171. Each cell has a vent cap
  1.    to allow gases out when the cell is on charge
  2.    all of the listed here
  3.    to check the level of electrolyte
  4.    to add water to the cell if needed
 Discuss Question
Answer: Option C. -> to check the level of electrolyte
Question 172. The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
  1.    none of the listed here
  2.    just one
  3.    always greater than one
  4.    always less than one
 Discuss Question
Answer: Option C. -> always greater than one
Question 173. During charging the specific gravity of the electrolyte of a lead-acid battery
  1.    increases
  2.    none of the listed here
  3.    decreases
  4.    remains the same
 Discuss Question
Answer: Option A. -> increases
Question 174. Electrolyte used in a lead-acid cell is
  1.    only H₂SO₄
  2.    dilute H₂SO₄
  3.    only water
  4.    NaOH
 Discuss Question
Answer: Option B. -> dilute H₂SO₄
Question 175. When the specific gravity of the electrolyte of a lead-acid cell is reduced to 1.1 to 1.15 the cell is in
  1.    charged state
  2.    active state
  3.    discharged state
  4.    none of the listed here
 Discuss Question
Answer: Option C. -> discharged state
Question 176. The best indication about the state of charge on a lead-acid battery is given by
  1.    none of the listed here
  2.    output voltage
  3.    temperature of electrolyte
  4.    specific gravity of electrolyte
 Discuss Question
Answer: Option D. -> specific gravity of electrolyte
Question 177. The watt-hour efficiency of a lead-acid cell varies between
  1.    70 to 80%
  2.    40 to 60%
  3.    90 to 95%
  4.    25 to 35%
 Discuss Question
Answer: Option A. -> 70 to 80%
Question 178. The ampere-hour efficiency of a leadacid cell is normally between
  1.    80 to 85%
  2.    70 to 75%
  3.    20 to 35%
  4.    90 to 95%
 Discuss Question
Answer: Option D. -> 90 to 95%
Question 179. Battery charging equipment is generally installed
  1.    All of the listed here
  2.    In well ventilated location
  3.    In clean and dry place
  4.    As near as practical to the battery being charged
 Discuss Question
Answer: Option A. -> All of the listed here
Question 180. Which of the following cell has a reversible chemical reaction ?
  1.    Lead-acid
  2.    Carbon-zinc
  3.    Silver-oxide
  4.    Mercury oxide
 Discuss Question
Answer: Option A. -> Lead-acid

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