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- Question
The commonest form of iron & manganese found in ground water as pollutant is in the form of their
Options- A. carbonates
- B. bi-carbonates
- C. chlorides
- D. sulphides
- Correct Answer
- bi-carbonates
- 1. 'Pneumoconiosis' is a disease caused by the inhalation of __________ dust.
Options- A. coal
- B. uranium ore
- C. iron ore
- D. lime Discuss
- 2. Iron & manganese present as pollutant in water can not be removed by
Options- A. ion exchange process.
- B. oxidation followed by settling & filtration.
- C. lime soda process or manganese zeolite process.
- D. chlorination. Discuss
- 3. Tri-sodium phosphate is used in boiler water treatment to reduce
Options- A. turbidity
- B. caustic embrittlement
- C. suspended silica
- D. dissolved oxygen Discuss
- 4. 80% less than 200 mesh size particles are called
Options- A. smoke
- B. powder
- C. grit
- D. aggregates Discuss
- 5. In water chemical treatment plant, use of chloramines ensures
Options- A. disinfection.
- B. taste & odour control.
- C. weed control in reservoirs.
- D. removal of permanent hardness. Discuss
- 6. Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
Options- A. 120
- B. 140
- C. 170
- D. 200 Discuss
- 7. TLV of mercury in potable (drinking) water is about __________ ppm.
Options- A. 0.001
- B. 0.1
- C. 1
- D. 5 Discuss
- 8. Smoke is produced due to
Options- A. insufficient supply of combustion air and insufficient time for combustion.
- B. poor quality of fuel and improper mixing of fuel & combustion air.
- C. poor design & overloading of furnace.
- D. all (a), (b) and (c). Discuss
- 9. Main pollutants released from iron & steel industry is
Options- A. CO, CO2 & SO2.
- B. H2S, NO & SO3.
- C. CO2, H2S & NO2.
- D. SO3, NO2 & CO2. Discuss
- 10. Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?
Options- A. Dust catcher (gravity type)
- B. Cyclone separator
- C. Bag filter
- D. Hollow wet scrubber Discuss
Environmental Engineering problems
Search Results
Correct Answer: coal
Correct Answer: chlorination.
Correct Answer: caustic embrittlement
Correct Answer: powder
Correct Answer: disinfection.
Correct Answer: 170
Correct Answer: 0.001
Correct Answer: all (a), (b) and (c).
Correct Answer: CO, CO2 & SO2.
Correct Answer: Dust catcher (gravity type)
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