Environmental Engineering problems
- 1. Which of the following is the most lethal water pollutant?
Options- A. Phenol and cynide
- B. Chlorine
- C. Alkalis
- D. Suspended solids Discuss
Correct Answer: Phenol and cynide
- 2. 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. Discuss
Correct Answer: mufflers (silencers).
- 3. 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
Correct Answer: detritus tank
- 4. Arsenic pollutant is not generated in____industries.
Options- A. tanneries
- B. glass & ceramic
- C. beverages
- D. any of these. Discuss
Correct Answer: beverages
- 5. 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
Correct Answer: causes asphyxia.
- 6. 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
Correct Answer: Global warming is detrimental for increase in food productivity and may cause flood and cyclone.
- 7. Smog is not formed due to the presence of __________ in the atmosphere.
Options- A. SO2
- B. NOx
- C. CO2
- D. any of these Discuss
Correct Answer: CO2
- 8. TLV of lead for public sewer/waste water is about __________ ppm.
Options- A. 1
- B. 25
- C. 150
- D. 650 Discuss
Correct Answer: 1
- 9. The upper layer of atmosphere is called the
Options- A. stratosphere
- B. troposphere
- C. ionosphere
- D. none of these Discuss
Correct Answer: stratosphere
- 10. Presence of nitrates in water in excess of 50 ppm causes
Options- A. mathenoglobenemia
- B. gastroentetitis
- C. asphyxiation
- D. tooth decay Discuss
Correct Answer: mathenoglobenemia
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