Discussion
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- Question
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.
- Correct Answer
- Refrigerators.
- 1. 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
- 2. The permissible color for domestic water supply is __________ ppm.
Options- A. 1
- B. 20
- C. 100
- D. 1000 Discuss
- 3. The biological decomposition of organic substances in wastes controlled conditions is called
Options- A. incineration
- B. biological oxidation
- C. composting
- D. none of these Discuss
- 4. Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Options- A. Benzopyrene
- B. Peroxyacyl nitrate
- C. Carbon monoxide
- D. Sulphur dioxide Discuss
- 5. Color test of water is done with an instrument called
Options- A. tintometer
- B. colorimeter
- C. electro-chemical cell
- D. turbidimeter Discuss
- 6. Global warming may result in
Options- A. flood
- B. cyclone
- C. decrease in food productivity
- D. all (a), (b) and (c) Discuss
- 7. 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
- 8. Which of the following is the most lethal water pollutant?
Options- A. Phenol and cynide
- B. Chlorine
- C. Alkalis
- D. Suspended solids Discuss
- 9. 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
- 10. 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
Environmental Engineering problems
Search Results
Correct Answer: 4 to 5
Correct Answer: 20
Correct Answer: composting
Correct Answer: Carbon monoxide
Correct Answer: tintometer
Correct Answer: all (a), (b) and (c)
Correct Answer: Limestone powder or alkalised alumina
Correct Answer: Phenol and cynide
Correct Answer: mufflers (silencers).
Correct Answer: detritus tank
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