Sail E0 Webinar

MCQs

Total Questions : 335 | Page 3 of 34 pages
Question 21. What is the main objective of secondary treatment of sewage plants?
  1.    To remove the suspended particles
  2.    To remove the contaminants
  3.    To remove the BOD
  4.    To remove the organic material
 Discuss Question
Answer: Option C. -> To remove the BOD
Answer: (c).To remove the BOD
Question 22. How many common approaches are used in secondary treatment?
  1.    One
  2.    Two
  3.    Three
  4.    Four
 Discuss Question
Answer: Option C. -> Three
Answer: (c).Three
Question 23. What is the meaning of ‘Tainting’ related to marine pollution?
  1.    Unpleasant flavor of seafood
  2.    Unpleasant flavor of water
  3.    Unpleasant flavor of soil
  4.    Unpleasant flavor of air
 Discuss Question
Answer: Option A. -> Unpleasant flavor of seafood
Answer: (a).Unpleasant flavor of seafood
Question 24. When drill cutting dumped on the seabed which toxic is produced?
  1.    Toxic nitrites
  2.    Toxic fluorides
  3.    Toxic sulphides
  4.    Toxic hydrates
 Discuss Question
Answer: Option C. -> Toxic sulphides
Answer: (c).Toxic sulphides
Question 25. What happens if liquid oil contaminates a bird’s plumage?
  1.    Birds bone become week
  2.    Birds lost its memory
  3.    Birds digestive system becomes weak
  4.    Birds lost its water-repellent properties
 Discuss Question
Answer: Option D. -> Birds lost its water-repellent properties
Answer: (d).Birds lost its water-repellent properties
Question 26. What is noise?
  1.    Desirable sound
  2.    Desirable and unwanted sound
  3.    Undesirable and unwanted sound
  4.    Undesirable and wanted sound
 Discuss Question
Answer: Option C. -> Undesirable and unwanted sound
Answer: (c).Undesirable and unwanted sound
Question 27. Which pollution cause hearing loss in organisms?
  1.    Air pollution
  2.    Noise pollution
  3.    Water pollution
  4.    Soil pollution
 Discuss Question
Answer: Option B. -> Noise pollution
Answer: (b).Noise pollution
Question 28. What is the dB of a threshold of pain?
  1.    100
  2.    110
  3.    120
  4.    146
 Discuss Question
Answer: Option D. -> 146
Answer: (d).146
Question 29. What is the dB of a threshold of hearing?
  1.    0
  2.    10
  3.    50
  4.    100
 Discuss Question
Answer: Option A. -> 0
Answer: (a).0
Question 30. In which unit sound is measured?
  1.    Kilometer
  2.    Pascal
  3.    Kilogram
  4.    Decibel
 Discuss Question
Answer: Option D. -> Decibel
Answer: (d).Decibel

Latest Videos

Latest Test Papers