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- Question
Foul odour and bad taste of water is removed by treating with
Options- A. alum
- B. bleaching powder
- C. activated carbon
- D. copper sulphate.
- Correct Answer
- activated carbon
- 1. 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
- 2. Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called
Options- A. grit
- B. dust
- C. powder
- D. smoke Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. Presence of __________ hardness is responsible for the temporary hardness in water.
Options- A. carbonate
- B. calcium
- C. choride
- D. sulphate Discuss
- 7. 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
- 8. 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
- 9. Oil and grease present in an emulsified state in waste water discharged from industries can be removed by
Options- A. biological oxidation.
- B. skimming off.
- C. settling out using chemical reagents.
- D. chlorination. Discuss
- 10. Presence of soluble organics in polluted water causes
Options- A. undesirable plants growth.
- B. depletion of oxygen.
- C. fire hazards.
- D. explosion hazards. Discuss
Environmental Engineering problems
Search Results
Correct Answer: 120
Correct Answer: grit
Correct Answer: All (a), (b) & (c).
Correct Answer: 1
Correct Answer: all (a), (b) and (c).
Correct Answer: calcium
Correct Answer: electrostatic precipitator
Correct Answer: very extremely
Correct Answer: settling out using chemical reagents.
Correct Answer: depletion of oxygen.
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