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MCQs

Total Questions : 236 | Page 20 of 24 pages
Question 191. Which of the following primary cells has the highest voltage ?
  1.    Mercury
  2.    Manganese-alkaline
  3.    Carbon-zinc
  4.    Lithium
 Discuss Question
Answer: Option D. -> Lithium
Question 192. Petroleum jelly is applied to the electrical connections to the lead-acid battery
  1.    reduce path resistance
  2.    prevent local heating
  3.    prevent corrosion
  4.    prevent short-circuiting
 Discuss Question
Answer: Option C. -> prevent corrosion
Question 193. _______ of electrolyte indicates the state of charge of the battery
  1.    mass
  2.    specific gravity
  3.    viscosity
  4.    colour
 Discuss Question
Answer: Option B. -> specific gravity
Question 194. The capacity of a lead-acid cell does not depend on its
  1.    temperature
  2.    quantity of active material
  3.    rate of charge
  4.    rate of discharge
 Discuss Question
Answer: Option C. -> rate of charge
Question 195. Five 2 V cells are connected in parallel. The output voltage is
  1.    2 V
  2.    1.5 V
  3.    15 V
  4.    10 V
 Discuss Question
Answer: Option A. -> 2 V
Question 196. Batteries are charged by
  1.    rectifiers
  2.    motor generator sets
  3.    engine generator sets
  4.    any one of the listed here
 Discuss Question
Answer: Option D. -> any one of the listed here
Question 197. The active material of the positive plates of silver-zinc batteries is
  1.    lead oxide
  2.    zinc powder
  3.    silver oxide
  4.    lead
 Discuss Question
Answer: Option C. -> silver oxide
Question 198. On the average the ampere-hour efficiency of an Edison cell is about
  1.    0.7
  2.    0.4
  3.    0.6
  4.    0.8
 Discuss Question
Answer: Option D. -> 0.8
Question 199. Cells are connected in parallel to
  1.    Increase the voltage output
  2.    Increase the current capacity
  3.    Increase the efficiency
  4.    Increase the internal resistance
 Discuss Question
Answer: Option B. -> Increase the current capacity
Question 200. On overcharging a battery
  1.    It will raise the specific gravity of the electrolyte
  2.    It will bring about chemical change in active materials
  3.    It will increase the capacity of the battery
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these

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