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- Question
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
Options- A. industrial chimney exhaust.
- B. automobiles exhaust.
- C. photochemical reaction in polluted atmosphere.
- D. burning of domestic fuel.
- Correct Answer
- automobiles exhaust.
- 1. Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas?
Options- A. Packed scrubber
- B. Gravity settling chamber
- C. Electrostatic precipitator
- D. Hydrocyclone Discuss
- 2. Which of the following plants does not emit appreciable amount of SO2 in atmosphere?
Options- A. Thermal power plant
- B. Petroleum refinery
- C. Nitric acid plant
- D. Sulphuric acid plant Discuss
- 3. Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
Options- A. CO2
- B. H2
- C. SO3
- D. N2 Discuss
- 4. A man exposed to excessive noise level in the working environment may suffer from
Options- A. hearing loss
- B. rupture of ear drum
- C. nervousness & fatigue
- D. all (a), (b) & (c) Discuss
- 5. White smoke coming out of the chimney of a furnace indicates the use of
Options- A. low excess air.
- B. very high excess air.
- C. gaseous fuel in the furnace.
- D. liquid fuel in the furnace. Discuss
- 6. Inhalation of silica dust by human being causes
Options- A. asphyxiation
- B. shortness of breath
- C. tuberculosis
- D. both(b) & (c) Discuss
- 7. Smog is
Options- A. nothing but black smoke.
- B. a combination of smoke and fog.
- C. a liquid particle resulting from vapor condensation.
- D. a solid particle e.g. flyash. Discuss
- 8. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
Options- A. hydrogen
- B. carbon dioxide
- C. ozone
- D. none of these Discuss
- 9. Average human body contains about __________ percent water by weight.
Options- A. 20
- B. 40
- C. 70
- D. 85 Discuss
- 10. Growth of __________ is promoted by the presence of manganese in water.
Options- A. files
- B. algae
- C. micro-organisms
- D. mosquitoes Discuss
Environmental Engineering problems
Search Results
Correct Answer: Electrostatic precipitator
Correct Answer: Nitric acid plant
Correct Answer: SO3
Correct Answer: all (a), (b) & (c)
Correct Answer: very high excess air.
Correct Answer: both(b) & (c)
Correct Answer: a combination of smoke and fog.
Correct Answer: ozone
Correct Answer: 70
Correct Answer: micro-organisms
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