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MCQs

Total Questions : 71 | Page 1 of 8 pages
Question 1. Ozone is a _______ allotrope of oxygen.
  1.    Monoatomic
  2.    Diatomic
  3.    Triatomic
  4.    Polyatomic
 Discuss Question
Answer: Option C. -> Triatomic
Answer: (c).Triatomic
Question 2. Which of the following is most effective in the killing of bacteria present in water?
  1.    Nascent oxygen
  2.    Chlorine
  3.    HOBr
  4.    I2
 Discuss Question
Answer: Option A. -> Nascent oxygen
Answer: (a).Nascent oxygen
Question 3. What happens during the breakdown of ozone?
  1.    CO₂ is formed
  2.    Nascent oxygen is formed
  3.    CO₂ and Nascent oxygen is formed
  4.    Formation of oxygen and water takes place.
 Discuss Question
Answer: Option B. -> Nascent oxygen is formed
Answer: (b).Nascent oxygen is formed
Question 4. The ozone generators can convert ____ % of feed oxygen into ozone.
  1.    1
  2.    5
  3.    1-4
  4.    10
 Discuss Question
Answer: Option C. -> 1-4
Answer: (c).1-4
Question 5. The water is free from oxidizable materials. What is the dosage of ozone required?
  1.    0.01ppm
  2.    0.1-0.2ppm
  3.    0.2-0.3ppm
  4.    0.4-0.5ppm
 Discuss Question
Answer: Option C. -> 0.2-0.3ppm
Answer: (c).0.2-0.3ppm
Question 6. The normal dose of chlorine during pre chlorination is ___________
  1.    0.5-1ppm
  2.    0.1-0.2ppm
  3.    0.1-0.5ppm
  4.    1-2ppm
 Discuss Question
Answer: Option C. -> 0.1-0.5ppm
Answer: (c).0.1-0.5ppm
Question 7. The normal dose of chlorine during post chlorination is ___________
  1.    0.5-1ppm
  2.    0.1-0.2ppm
  3.    0.1-0.5ppm
  4.    1-2ppm
 Discuss Question
Answer: Option B. -> 0.1-0.2ppm
Answer: (b).0.1-0.2ppm
Question 8. _________ is the application of chlorine before filtration.
  1.    Plain chlorination
  2.    Pre chlorination
  3.    Super chlorination
  4.    Double chlorination
 Discuss Question
Answer: Option B. -> Pre chlorination
Answer: (b).Pre chlorination
Question 9. In which form of chlorination, chlorine applies to raw water supply as it enters the distribution system?
  1.    Plain chlorination
  2.    Pre chlorination
  3.    Super chlorination
  4.    Double chlorination
 Discuss Question
Answer: Option A. -> Plain chlorination
Answer: (a).Plain chlorination
Question 10. __________ is the application of chlorine at two or more points in the purification process.
  1.    Plain chlorination
  2.    Pre chlorination
  3.    Super chlorination
  4.    Double chlorination
 Discuss Question
Answer: Option D. -> Double chlorination
Answer: (d).Double chlorination

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