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- Question
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)
- Correct Answer
- both (b) and (c)
- 1. Ozone is
Options- A. a primary pollutant.
- B. a secondary pollutant.
- C. impervious to ultra-violet rays.
- D. both (b) and (c) Discuss
- 2. Noise pollution level in a chemical plant is expressed in
Options- A. roentgen
- B. decibel
- C. hertz
- D. none of these Discuss
- 3. The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about __________ decibels.
Options- A. 60
- B. 90
- C. 105
- D. 120 Discuss
- 4. In a sedimentation tank, the detention period for water ranges from __________ hours.
Options- A. 2 to 4
- B. 8 to 12
- C. 16 to 20
- D. 24 to 32 Discuss
- 5. For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
Options- A. 10000
- B. 5
- C. 500
- D. 1000 Discuss
- 6. 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
- 7. 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
- 8. In water treatment plant, zeolite process is used to remove the __________ of water.
Options- A. acidity
- B. alkalinity
- C. hardness
- D. iron & zinc Discuss
- 9. 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
- 10. 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
Environmental Engineering problems
Search Results
Correct Answer: both (b) and (c)
Correct Answer: decibel
Correct Answer: 90
Correct Answer: 2 to 4
Correct Answer: 5
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.
Correct Answer: 90
Correct Answer: hardness
Correct Answer: methyl iso-cynate (MIC)
Correct Answer: neutralised by alkali treatment.
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