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MCQs

Total Questions : 112 | Page 6 of 12 pages
Question 51. Activated carbon can be applied to raw water ______ treatment process.
  1.    During
  2.    Ahead of
  3.    Before
  4.    After
 Discuss Question
Answer: Option B. -> Ahead of
Answer: (b).Ahead of
Question 52. What is the dose of copper sulfate required for the treatment of water?
  1.    0.3-0.6ppm
  2.    2-6ppm
  3.    4-8ppm
  4.    10-20ppm
 Discuss Question
Answer: Option A. -> 0.3-0.6ppm
Answer: (a).0.3-0.6ppm
Question 53. There are protozoa present in the water. Its name is Dinobryen. What is the dose of copper sulfate required to kill it?
  1.    0.02ppm
  2.    0.3ppm
  3.    0.5ppm
  4.    0.8ppm
 Discuss Question
Answer: Option B. -> 0.3ppm
Answer: (b).0.3ppm
Question 54. The fluoride concentration for prevention of dental caries is ____________
  1.    1mg/l
  2.    2mg/l
  3.    3mg/l
  4.    4mg/l
 Discuss Question
Answer: Option A. -> 1mg/l
Answer: (a).1mg/l
Question 55. The dose of activated carbon in powdered form is controlled by ____________
  1.    Chromatography
  2.    Distillation
  3.    Threshold odor test
  4.    MPN test
 Discuss Question
Answer: Option C. -> Threshold odor test
Answer: (c).Threshold odor test
Question 56. In which process, the fluoride content of water is raised?
  1.    Chlorination
  2.    Fluoridation
  3.    Defluoridation
  4.    Flocculation
 Discuss Question
Answer: Option B. -> Fluoridation
Answer: (b).Fluoridation
Question 57. Fluorides in solution form are preferred over powdered form for fluoridation.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 58. Which of the following is the pure compound?
  1.    Sodium fluoride
  2.    Sodium silico fluoride
  3.    Hydrofluosilicic acid
  4.    Sodium fluro carbonate
 Discuss Question
Answer: Option A. -> Sodium fluoride
Answer: (a).Sodium fluoride
Question 59. As far as safer handling is considered, which of the following is used for fluoridation?
  1.    Sodium fluoride
  2.    Sodium silico fluoride
  3.    Hydrofluosilicic acid
  4.    Sodium fluro carbonate
 Discuss Question
Answer: Option C. -> Hydrofluosilicic acid
Answer: (c).Hydrofluosilicic acid
Question 60. Which of the following is not used as a fluoride compound?
  1.    Sodium fluoride
  2.    Sodium silico fluoride
  3.    Hydrofluosilicic acid
  4.    Sodium fluro carbonate
 Discuss Question
Answer: Option D. -> Sodium fluro carbonate
Answer: (d).Sodium fluro carbonate

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