Discussion
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- Question
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.
Options- A. 75
- B. 95
- C. 120
- D. 140
- Correct Answer
- 95
- 1. Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.
Options- A. 20
- B. 60
- C. 90
- D. 120 Discuss
- 2. Industrial workers working in leather tanning & manufacturing units are prone to suffer from
Options- A. respirtory ailments (e.g. bronchitis).
- B. skin diseases (e.g. dermatities).
- C. silicosis.
- D. blurred vision. Discuss
- 3. World's worst radioactive pollution was caused by nuclear reactor disaster which occured in
Options- A. Arizona (U.S.A.)
- B. Chernobyl (undivided U.S.S.R.)
- C. Pensylvania (U.S.A.)
- D. Moscow (U.S.S.R.) Discuss
- 4. Dissolved oxygen content in river water is around __________ ppm.
Options- A. 5
- B. 100
- C. 250
- D. 500 Discuss
- 5. Water effluent generated in printing industry is decolourised by
Options- A. ion exchange technique.
- B. reverse osmosis.
- C. electrolytic decomposition.
- D. adsorption. Discuss
- 6. Nitrogen oxides (NOx) is not produced in the __________ industry.
Options- A. nitric acid making
- B. nitrogenous fertiliser
- C. detergent
- D. any of these Discuss
- 7. Peroxyacyl nitrate (PAN), a pollutant is found in the
Options- A. automobile exhaust.
- B. flue gas of coal based power plant.
- C. exhaust of nitric acid plant.
- D. exhaust of sulphuric acid plant. Discuss
- 8. Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds __________ percent (by volume).
Options- A. 1
- B. 3
- C. 7
- D. 20 Discuss
- 9. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
Options- A. coal ash
- B. potassium cyanide
- C. ortho-xylene
- D. none of these Discuss
- 10. Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
Options- A. 1-2
- B. 5-10
- C. 15-20
- D. 25-30 Discuss
Environmental Engineering problems
Search Results
Correct Answer: 90
Correct Answer: skin diseases (e.g. dermatities).
Correct Answer: Chernobyl (undivided U.S.S.R.)
Correct Answer: 5
Correct Answer: electrolytic decomposition.
Correct Answer: detergent
Correct Answer: automobile exhaust.
Correct Answer: 20
Correct Answer: potassium cyanide
Correct Answer: 5-10
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