Discussion
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- Question
In sewage treatment, its sedimentation is speeded up by commonly adding
Options- A. hydrochloric acid.
- B. lime.
- C. copper sulphate.
- D. sodium sulphate.
- Correct Answer
- lime.
- 1. Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
Options- A. poor visibility due to sky darkening.
- B. irritation in eyes.
- C. respiratory trouble.
- D. all (a), (b) and (c). Discuss
- 2. Which of the following is a secondary air pollutant?
Options- A. Photochemical smog
- B. Sulphur dioxide
- C. Nitrogen dioxide
- D. Dust particles Discuss
- 3. Fresh domestic sewage is __________ in color.
Options- A. grey
- B. dark brown
- C. red
- D. black Discuss
- 4. There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
Options- A. 0.05
- B. 1
- C. 6.5
- D. 15 Discuss
- 5. Removal of __________ results from the disinfection of water.
Options- A. turbidity
- B. odour
- C. hardness
- D. bacteria Discuss
- 6. Presence of __________ bacteria in water causes disease like typhoid.
Options- A. aerobic
- B. pathogenic
- C. anaerobic
- D. non-pathogenic Discuss
- 7. Which of the following is a manmade source of air pollution?
Options- A. Automobile exhaust.
- B. Forest fire.
- C. Bacterial action in soil and swamp areas
- D. All (a), (b) and (c). Discuss
- 8. TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes
Options- A. skin disorder
- B. bronchitis
- C. bone disease
- D. cancer Discuss
- 9. Which of the following sources is responsible for maximum air pollution?
Options- A. Industrial chimney exhaust.
- B. Forest fire.
- C. Automobiles exhaust.
- D. Photochemical oxidation of organic matter. Discuss
- 10. Which of the following is not a practical method of low level radioactive waste disposal?
Options- A. Dilution with inert material.
- B. Discharging to atmosphere through tall stacks after dilution.
- C. Disposing off in rivers & oceans.
- D. Filling in steel crates and shooting it off out of earth's gravity. Discuss
Environmental Engineering problems
Search Results
Correct Answer: all (a), (b) and (c).
Correct Answer: Photochemical smog
Correct Answer: grey
Correct Answer: 6.5
Correct Answer: bacteria
Correct Answer: pathogenic
Correct Answer: Automobile exhaust.
Correct Answer: bronchitis
Correct Answer: Automobiles exhaust.
Correct Answer: Filling in steel crates and shooting it off out of earth's gravity.
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