Discussion
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- Question
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
- Correct Answer
- 1
- 1. 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
- 2. Ozone level is generally found to be depleted in India in the month of
Options- A. February
- B. July
- C. April
- D. December Discuss
- 3. 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 Discuss
- 4. '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
- 5. Presence of bacteria in potable (drinking) water causes
Options- A. turbidity
- B. disease
- C. bad odour
- D. bad taste & colour Discuss
- 6. 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
- 7. Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called
Options- A. grit
- B. dust
- C. powder
- D. smoke Discuss
- 8. Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
Options- A. 90
- B. 120
- C. 150
- D. 180 Discuss
- 9. Foul odour and bad taste of water is removed by treating with
Options- A. alum
- B. bleaching powder
- C. activated carbon
- D. copper sulphate. Discuss
- 10. Presence of __________ hardness is responsible for the temporary hardness in water.
Options- A. carbonate
- B. calcium
- C. choride
- D. sulphate Discuss
Environmental Engineering problems
Search Results
Correct Answer: all (a), (b) and (c).
Correct Answer: December
Correct Answer: 4
Correct Answer: None of these
Correct Answer: disease
Correct Answer: All (a), (b) & (c).
Correct Answer: grit
Correct Answer: 120
Correct Answer: activated carbon
Correct Answer: calcium
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