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MCQs

Total Questions : 66 | Page 1 of 7 pages
Question 1. The chemical composition of wastewater naturally reflects the origin from which it came.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 2. ______ tend to resist conventional methods of wastewater treatment.
  1.    Suspended solids
  2.    Nutrients
  3.    Refractory organics
  4.    Priority pollutants
 Discuss Question
Answer: Option C. -> Refractory organics
Answer: (c).Refractory organics
Question 3. Which of the following related to the aerobic organic matter is true?
  1.    Essential nutrients for growth
  2.    Development of sludge deposits
  3.    Growth of undesirable aquatic life
  4.    Development of septic conditions
 Discuss Question
Answer: Option D. -> Development of septic conditions
Answer: (d).Development of septic conditions
Question 4. The quality of the fish habitat begins to increase when the dissolved oxygen concentration drops below 4 or 5 mg L-1.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 5. The world’s available fresh water supply is about _______ percent of that total water supply.
  1.    10
  2.    4
  3.    3
  4.    7
 Discuss Question
Answer: Option C. -> 3
Answer: (c).3
Question 6. During which of the following conditions, the deoxygenation is equal to reoxygenation?
  1.    Stream exposed to atmosphere
  2.    Increased volume
  3.    Greener vegetation
  4.    High temperature
 Discuss Question
Answer: Option A. -> Stream exposed to atmosphere
Answer: (a).Stream exposed to atmosphere
Question 7. In the concept of self purification of natural streams, complete the following phrase.
Solution to pollution is _________
  1.    Control
  2.    Dilution
  3.    Reuse
  4.    Recycle
 Discuss Question
Answer: Option B. -> Dilution
Answer: (b).Dilution
Question 8. What is the minimum amount of DO required for the life survival of aquatic animals?
  1.    10 mg/l
  2.    5 mg/l
  3.    2 mg/l
  4.    1 mg/l
 Discuss Question
Answer: Option C. -> 2 mg/l
Answer: (c).2 mg/l
Question 9. Which one of the following is the basic indicator of river health?
  1.    BOD
  2.    COD
  3.    DO
  4.    ThOD
 Discuss Question
Answer: Option C. -> DO
Answer: (c).DO
Question 10. Oxygen demanding wastes improves DO.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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