Discussion
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- Question
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (? g)/litre.
Options- A. 2
- B. 42
- C. 332
- D. 1050
- Correct Answer
- 42
- 1. __________ is the process of killing organism in water.
Options- A. Coagulation
- B. Sterilisation
- C. Disinfection
- D. Sedimentation Discuss
- 2. During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Options- A. filtration
- B. digestion
- C. sedimentation
- D. both (b) and (c) Discuss
- 3. __________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
Options- A. Calcium
- B. Fluorine
- C. Phosphorous
- D. Sulphur Discuss
- 4. Sulphur dioxide present in the industrial chimney exhaust gases causes
Options- A. respiratory & lung disease.
- B. reduction in plant's productivity owing to acid rain.
- C. corrosion of building materials.
- D. all (a), (b) and (c). Discuss
- 5. Hydrogen ion concentration in distilled water is
Options- A. 10-7
- B. 7 x 10-7
- C. 107
- D. 7 x 107 Discuss
- 6. The maximum CO2 is emitted into the atmosphere by
Options- A. combustion
- B. urea
- C. biomass burning
- D. trees Discuss
- 7. Pick out the wrong statement.
Options- A. A slight haze at the top of chimney indicates good combustion in the furnace.
- B. A bag filter incurs very small pressure drop and is very efficient for removal of sub-micronic dust particles from flue gases at very high temperature.
- C. Electrostatic precipitator is the most efficient dust collection equipment for removal of sub-micronic dust particles present in flue gas.
- D. none of these. Discuss
- 8. Brown spots in fabrics will be caused by washing with water containing large amount of .
Options- A. iron
- B. zinc
- C. iodine
- D. bromine Discuss
- 9. Removal of __________ results from the disinfection of water.
Options- A. turbidity
- B. odour
- C. hardness
- D. bacteria Discuss
- 10. There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
Options- A. 0.05
- B. 1
- C. 6.5
- D. 15 Discuss
Environmental Engineering problems
Search Results
Correct Answer: Disinfection
Correct Answer: both (b) and (c)
Correct Answer: Fluorine
Correct Answer: all (a), (b) and (c).
Correct Answer: 10-7
Correct Answer: combustion
Correct Answer: A bag filter incurs very small pressure drop and is very efficient for removal of sub-micronic dust particles from flue gases at very high temperature.
Correct Answer: iron
Correct Answer: bacteria
Correct Answer: 6.5
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