Environmental Engineering problems
- 1. Noise pollution level in a chemical plant is expressed in
Options- A. roentgen
- B. decibel
- C. hertz
- D. none of these Discuss
Correct Answer: decibel
- 2. Ozone is
Options- A. a primary pollutant.
- B. a secondary pollutant.
- C. impervious to ultra-violet rays.
- D. both (b) and (c) Discuss
Correct Answer: both (b) and (c)
- 3. The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
Options- A. catalytic conversion
- B. green house effect
- C. global warming
- D. both (b) and (c) Discuss
Correct Answer: both (b) and (c)
- 4. Pick out the wrong statement
Options- A. Low ozone layer thickness in polar regions is due to cold climatic conditions
- B. Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine.
- C. Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine.
- D. Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing minamate disease. Discuss
Correct Answer: Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine.
- 5. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ ?g/m3.(?g-microgram)
Options- A. 10
- B. 90
- C. 800
- D. 750 Discuss
Correct Answer: 90
- 6. In water treatment plant, zeolite process is used to remove the __________ of water.
Options- A. acidity
- B. alkalinity
- C. hardness
- D. iron & zinc Discuss
Correct Answer: hardness
- 7. 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
Correct Answer: methyl iso-cynate (MIC)
- 8. 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
Correct Answer: neutralised by alkali treatment.
- 9. 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
Correct Answer: CFC (chloro fluoro carbon)
- 10. Ethanolamine is an absorbant used for the removal of __________ from air/gas.
Options- A. HF
- B. SO2
- C. H2S
- D. both (b) & (c) Discuss
Correct Answer: both (b) & (c)
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