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MCQs

Total Questions : 112 | Page 1 of 12 pages
Question 1. The thickness of the layers of filter sand of zeolite softener is ____________
  1.    20cm
  2.    30cm
  3.    40cm
  4.    100cm
 Discuss Question
Answer: Option D. -> 100cm
Answer: (d).100cm
Question 2. What concentration of iron and manganese will cause unpleasant taste and odor of water?
  1.    1ppm
  2.    2ppm
  3.    3ppm
  4.    >3ppm
 Discuss Question
Answer: Option D. -> >3ppm
Answer: (d).>3ppm
Question 3. Iron and Manganese are generally present in water supplies as ____________
  1.    Suspension
  2.    Solution
  3.    Colloidal particles
  4.    Either suspension or solution
 Discuss Question
Answer: Option D. -> Either suspension or solution
Answer: (d).Either suspension or solution
Question 4. Which of the following is a disadvantage of the zeolite process?
  1.    No sludge is formed
  2.    The process is almost automatic
  3.    Suspended impurities get deposited around the zeolite particles
  4.    Zero hardness can be occurred
 Discuss Question
Answer: Option C. -> Suspended impurities get deposited around the zeolite particles
Answer: (c).Suspended impurities get deposited around the zeolite particles
Question 5. The zeolite process is unsuitable for water containing iron and manganese.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 6. What happens when water contains 8-20 ppm of fluoride concentration?
  1.    Blue baby disease
  2.    Crippling fluorosis
  3.    Dental fluorosis
  4.    Mottling of teeth
 Discuss Question
Answer: Option B. -> Crippling fluorosis
Answer: (b).Crippling fluorosis
Question 7. Which of the following is not used for defluoridation?
  1.    Calcium phosphate
  2.    Copper sulfate
  3.    Alum
  4.    Bone charcoal
 Discuss Question
Answer: Option B. -> Copper sulfate
Answer: (b).Copper sulfate
Question 8. One cubic metre of bone can treat how much quantity of water containing 3.5 ppm of fluoride?
  1.    10m³
  2.    100m³
  3.    1000m³
  4.    10000m³
 Discuss Question
Answer: Option B. -> 100m³
Answer: (b).100m³
Question 9. At which temperature, the bone is calcinated during defluoridation with calcium phosphate?
  1.    100-200°C
  2.    200-300°C
  3.    400-600°C
  4.    500-800°C
 Discuss Question
Answer: Option C. -> 400-600°C
Answer: (c).400-600°C
Question 10. The process of reducing the fluoride content from water is called _____
  1.    Chlorination
  2.    Fluoridation
  3.    Defluoridation
  4.    Flocculation
 Discuss Question
Answer: Option C. -> Defluoridation
Answer: (c).Defluoridation

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