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MCQs

Total Questions : 236 | Page 9 of 24 pages
Question 81. When the lead-acid cell is fully charged, the electrolyte assumes _____ appearance
  1.    dull
  2.    reddish
  3.    bright
  4.    milky
 Discuss Question
Answer: Option D. -> milky
Question 82. The charge required to liberate one gram equivalent of any substance is known as ______ constant
  1.    Time
  2.    Faraday’s
  3.    Boltzman
  4.    none of the above
 Discuss Question
Answer: Option B. -> Faraday’s
Question 83. Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as______materials.
  1.    passive
  2.    active
  3.    redundant
  4.    inert
 Discuss Question
Answer: Option B. -> active
Question 84. In ______ system the charging current is intermittently controlled at either a maximum or minimum value
  1.    two rate charge control
  2.    trickle charge
  3.    floating charge
  4.    an equalizing charge
 Discuss Question
Answer: Option A. -> two rate charge control
Question 85. Cells are connected in series in order to
  1.    increase the voltage rating
  2.    increase the current rating
  3.    increase the life of the cells
  4.    none of the above
 Discuss Question
Answer: Option A. -> increase the voltage rating
Question 86. Under normal charging rate, the charging current should be
  1.    10% of capacity
  2.    20% of capacity
  3.    30% of capacity
  4.    40% of capacity
 Discuss Question
Answer: Option A. -> 10% of capacity
Question 87. When the load resistance equals the generator resistance which of the following will be maximum ?
  1.    Current
  2.    Efficiency of the circuit
  3.    Power in the load resistance
  4.    Voltage across the load resistance
 Discuss Question
Answer: Option C. -> Power in the load resistance
Question 88. If a battery is wrongly connected on charge following will happen
  1.    current delivered by the battery will be high
  2.    current drawing will be nil
  3.    current drawing will be very small
  4.    current drawing will be very high
 Discuss Question
Answer: Option D. -> current drawing will be very high
Question 89. The specific gravity of electrolyte is measured by
  1.    manometer
  2.    a mechanical gauge
  3.    hydrometer
  4.    psychrometer
 Discuss Question
Answer: Option C. -> hydrometer
Question 90. A constant-voltage generator has
  1.    minimum efficiency
  2.    minimum current capacity
  3.    low internal resistance
  4.    high internal resistance
 Discuss Question
Answer: Option C. -> low internal resistance

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