Discussion
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- Question
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.
- Correct Answer
- Automobiles exhaust.
- 1. 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
- 2. 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
- 3. Presence of __________ bacteria in water causes disease like typhoid.
Options- A. aerobic
- B. pathogenic
- C. anaerobic
- D. non-pathogenic Discuss
- 4. In sewage treatment, its sedimentation is speeded up by commonly adding
Options- A. hydrochloric acid.
- B. lime.
- C. copper sulphate.
- D. sodium sulphate. Discuss
- 5. 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
- 6. 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
- 7. Beyond what concentration of H2S in air, acute danger to human life exists?
Options- A. 50 ppm
- B. 100 ppm
- C. 300 ppm
- D. 700 ppm Discuss
- 8. Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
Options- A. low amount of excess combustion air
- B. large quantity of excess combustion air
- C. hydrocarbon fuel
- D. pulverised coal as fuel Discuss
- 9. CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
Options- A. 102
- B. 105
- C. 109
- D. 1015 Discuss
- 10. Insufficient washing of sand grains in a rapid sand filter causes
Options- A. air binding
- B. shrinkage of filtering media
- C. mud balls
- D. expansion of filtering media Discuss
Environmental Engineering problems
Search Results
Correct Answer: bronchitis
Correct Answer: Automobile exhaust.
Correct Answer: pathogenic
Correct Answer: lime.
Correct Answer: all (a), (b) and (c).
Correct Answer: Filling in steel crates and shooting it off out of earth's gravity.
Correct Answer: 700 ppm
Correct Answer: low amount of excess combustion air
Correct Answer: 105
Correct Answer: mud balls
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