Discussion
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- Question
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
Options- A. 1
- B. 4
- C. 8
- D. 12
- Correct Answer
- 4
- 1. 'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
Options- A. Dust & mists
- B. Smoke & fumes
- C. Photochemical smog & soot
- D. None of these Discuss
- 2. Presence of bacteria in potable (drinking) water causes
Options- A. turbidity
- B. disease
- C. bad odour
- D. bad taste & colour Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. Ozone level is generally found to be depleted in India in the month of
Options- A. February
- B. July
- C. April
- D. December Discuss
- 7. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
Options- A. fading of dyes on textiles.
- B. corrosion, tarnishing & soiling of metals.
- C. reduced strength of textiles.
- D. all (a), (b) and (c). Discuss
- 8. Dose of chlorine for disinfection of water is about __________ mg/litre of water.
Options- A. 0.01
- B. 0.1
- C. 0.3
- D. 1 Discuss
- 9. What are the methods of treatment & disposal of radioactive wastes?
Options- A. Evaporation & chemical precipitation.
- B. Biological methods & adsorption in ion exchange materials.
- C. Fixing into a solid mass with cement and sinking deep in the sea.
- D. All (a), (b) & (c). Discuss
- 10. Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called
Options- A. grit
- B. dust
- C. powder
- D. smoke Discuss
Environmental Engineering problems
Search Results
Correct Answer: None of these
Correct Answer: disease
Correct Answer: 5-10
Correct Answer: potassium cyanide
Correct Answer: 20
Correct Answer: December
Correct Answer: all (a), (b) and (c).
Correct Answer: 1
Correct Answer: All (a), (b) & (c).
Correct Answer: grit
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