Discussion
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- Question
The progressive warming up of the earth's surface is mainly due to the
Options- A. automobile exhaust.
- B. blanketing effect of CO2 in the atmosphere.
- C. de-forestation.
- D. thickening of ozone layer.
- Correct Answer
- blanketing effect of CO2 in the atmosphere.
- 1. The lowest layer of atmosphere is known as the
Options- A. stratosphere
- B. troposphere
- C. ionosphere
- D. none of these Discuss
- 2. Ethanolamine is an absorbant used for the removal of __________ from air/gas.
Options- A. HF
- B. SO2
- C. H2S
- D. both (b) & (c) Discuss
- 3. Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of
Options- A. CO2
- B. SO2
- C. hydrocarbons
- D. CFC (chloro fluoro carbon) Discuss
- 4. Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
Options- A. neutralised by alkali treatment.
- B. left as such without any treatment.
- C. diluted with fresh water to reduce its acidity.
- D. none of these. Discuss
- 5. The Killer gas which caused Bhopal gas tragedy in 1984 was
Options- A. phosgene
- B. methyl iso-cynate (MIC)
- C. carbon monoxide
- D. sulphur dioxide Discuss
- 6. Color test of water is done with an instrument called
Options- A. tintometer
- B. colorimeter
- C. electro-chemical cell
- D. turbidimeter Discuss
- 7. 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
- 8. 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
- 9. The permissible color for domestic water supply is __________ ppm.
Options- A. 1
- B. 20
- C. 100
- D. 1000 Discuss
- 10. 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
Environmental Engineering problems
Search Results
Correct Answer: troposphere
Correct Answer: both (b) & (c)
Correct Answer: CFC (chloro fluoro carbon)
Correct Answer: neutralised by alkali treatment.
Correct Answer: methyl iso-cynate (MIC)
Correct Answer: tintometer
Correct Answer: Carbon monoxide
Correct Answer: composting
Correct Answer: 20
Correct Answer: 4 to 5
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