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MCQs

Total Questions : 112 | Page 11 of 12 pages
Question 101. Micro strainers are used to remove color in water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 102. Identify the incorrect statement regarding aeration process.
  1.    It removes taste and odor
  2.    It increases the dissolved oxygen content of water
  3.    It increases the carbon dioxide content of water
  4.    It is used for mixing chemicals with water
 Discuss Question
Answer: Option C. -> It increases the carbon dioxide content of water
Answer: (c).It increases the carbon dioxide content of water
Question 103. Which of the following statement is wrong regarding hard water?
  1.    It causes more consumption of soap in laundry work
  2.    It causes difficulties in the manufacturing process
  3.    It increases the taste of food
  4.    It causes the formation of scales on the boilers
 Discuss Question
Answer: Option C. -> It increases the taste of food
Answer: (c).It increases the taste of food
Question 104. Which chemical is used for removing the permanent hardness of Calcium chloride?
  1.    Lime
  2.    Chlorine
  3.    Soda
  4.    Both lime and soda
 Discuss Question
Answer: Option B. -> Chlorine
Answer: (b).Chlorine
Question 105. The temperature at which the softening of water takes place by lime soda process is ____________
  1.    10°-21°C
  2.    20°-30°C
  3.    39°-45°C
  4.    90°C
 Discuss Question
Answer: Option A. -> 10°-21°C
Answer: (a).10°-21°C
Question 106. The time required for the mixing of lime and soda in lime soda process is _____________
  1.    10min
  2.    20min
  3.    40min
  4.    80 min
 Discuss Question
Answer: Option C. -> 40min
Answer: (c).40min
Question 107. The permanent hardness can be removed by adding lime and soda.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 108. Softening chemicals, lime and soda do not depend on ____________
  1.    Free carbon dioxide present
  2.    Non carbonate hardness
  3.    Total magnesium
  4.    Carbonate hardness
 Discuss Question
Answer: Option D. -> Carbonate hardness
Answer: (d).Carbonate hardness
Question 109. The minimum reaction time allowed in the recarbonation basin is ____________
  1.    5minutes
  2.    10minutes
  3.    15minutes
  4.    20minutes
 Discuss Question
Answer: Option D. -> 20minutes
Answer: (d).20minutes
Question 110. Which filter is normally used in the lime soda treatment plant?
  1.    Slow sand filter
  2.    Rapid sand filter
  3.    Dual media filter
  4.    Mixed media filter
 Discuss Question
Answer: Option B. -> Rapid sand filter
Answer: (b).Rapid sand filter

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