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- Question
High noise levels produced during operation of fans and compressors can be reduced by using
Options- A. mufflers (silencers).
- B. accoustical absorbent.
- C. lagging of noisy duct.
- D. none of these.
- Correct Answer
- mufflers (silencers).
- 1. Which of the following is the most lethal water pollutant?
Options- A. Phenol and cynide
- B. Chlorine
- C. Alkalis
- D. Suspended solids Discuss
- 2. Which of the following is an adsorbant used for the removal of SO2 from gas/air?
Options- A. Bog iron
- B. Limestone powder or alkalised alumina
- C. Silica gel
- D. Active carbon Discuss
- 3. Global warming may result in
Options- A. flood
- B. cyclone
- C. decrease in food productivity
- D. all (a), (b) and (c) Discuss
- 4. Which of the following is not a source of ozone emission in the atmosphere?
Options- A. Refrigerators.
- B. Xerox machines.
- C. Dermatological photo-therapy equipments.
- D. High voltage electrical equipments. Discuss
- 5. In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks.
Options- A. 1 to 2
- B. 4 to 5
- C. 9 to 10
- D. 15 to 20 Discuss
- 6. Fine grit present in sewage is removed in the __________ during sewage treatment.
Options- A. grit chamber
- B. detritus tank
- C. trickling filter
- D. skimming tank. Discuss
- 7. Arsenic pollutant is not generated in____industries.
Options- A. tanneries
- B. glass & ceramic
- C. beverages
- D. any of these. Discuss
- 8. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)
Options- A. acts as a green house gas thereby raising earth's temperature.
- B. causes asphyxia.
- C. causes increase in sea level.
- D. inhances the green house effect. Discuss
- 9. Pick out the correct statement.
Options- A. Deforestation helps in controlling the green house effect.
- B. Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
- C. Lightening discharges are natural source of production of SO2 & H2S pollutant.
- D. Sulhur dioxide causes death by asphyxiation. Discuss
- 10. Smog is not formed due to the presence of __________ in the atmosphere.
Options- A. SO2
- B. NOx
- C. CO2
- D. any of these Discuss
Environmental Engineering problems
Search Results
Correct Answer: Phenol and cynide
Correct Answer: Limestone powder or alkalised alumina
Correct Answer: all (a), (b) and (c)
Correct Answer: Refrigerators.
Correct Answer: 4 to 5
Correct Answer: detritus tank
Correct Answer: beverages
Correct Answer: causes asphyxia.
Correct Answer: Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
Correct Answer: CO2
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