Environmental Engineering problems
- 1. Ozone level is generally found to be depleted in India in the month of
Options- A. February
- B. July
- C. April
- D. December Discuss
Correct Answer: December
- 2. 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
Correct Answer: all (a), (b) and (c).
- 3. 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
Correct Answer: 1
- 4. 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
Correct Answer: All (a), (b) & (c).
- 5. Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called
Options- A. grit
- B. dust
- C. powder
- D. smoke Discuss
Correct Answer: grit
- 6. 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
Correct Answer: 120
- 7. 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
Correct Answer: activated carbon
- 8. Presence of __________ hardness is responsible for the temporary hardness in water.
Options- A. carbonate
- B. calcium
- C. choride
- D. sulphate Discuss
Correct Answer: calcium
- 9. Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the
Options- A. gravity settling chamber
- B. cyclone separator
- C. electrostatic precipitator
- D. bag filter Discuss
Correct Answer: electrostatic precipitator
- 10. Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
Options- A. moderately
- B. highly
- C. extremely
- D. very extremely Discuss
Correct Answer: very extremely
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