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- Question
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
- Correct Answer
- 700 ppm
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. Presence of __________ bacteria in water causes disease like typhoid.
Options- A. aerobic
- B. pathogenic
- C. anaerobic
- D. non-pathogenic Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. Out of the following, TLV of __________ is maximum (about 500 ppm).
Options- A. carbon dioxide
- B. toluene
- C. carbon disulphide
- D. acetaldehyde Discuss
- 10. Reingleman chart is used for the evaluation of __________ pollution.
Options- A. air
- B. water
- C. noise
- D. radioactive Discuss
Environmental Engineering problems
Search Results
Correct Answer: Filling in steel crates and shooting it off out of earth's gravity.
Correct Answer: Automobiles exhaust.
Correct Answer: bronchitis
Correct Answer: Automobile exhaust.
Correct Answer: pathogenic
Correct Answer: low amount of excess combustion air
Correct Answer: 105
Correct Answer: mud balls
Correct Answer: carbon dioxide
Correct Answer: air
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