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- Question
Average human body contains about __________ percent water by weight.
Options- A. 20
- B. 40
- C. 70
- D. 85
- Correct Answer
- 70
- 1. 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
- 2. 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
- 3. Inhalation of silica dust by human being causes
Options- A. asphyxiation
- B. shortness of breath
- C. tuberculosis
- D. both(b) & (c) Discuss
- 4. '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. Discuss
- 5. 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
- 6. Growth of __________ is promoted by the presence of manganese in water.
Options- A. files
- B. algae
- C. micro-organisms
- D. mosquitoes Discuss
- 7. Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.
Options- A. 105
- B. 135
- C. 160
- D. 185 Discuss
- 8. Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
Options- A. fire hazards.
- B. explosion hazards.
- C. persistent foam.
- D. depletion of dissolved oxygen. Discuss
- 9. If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
Options- A. 50
- B. 500
- C. 1000
- D. 3000 (i.e. 0.3%) Discuss
- 10. Pick out the wrong statement.
Options- A. The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere.
- B. Stratosphere is rich in ozone and is located just above the troposphere.
- C. Troposphere is a turbulent dusty zone containing much of water vapor and clouds.
- D. The earth's atmosphere is an envelope of gases extending upto a height of about 200 kms. Discuss
Environmental Engineering problems
Search Results
Correct Answer: ozone
Correct Answer: a combination of smoke and fog.
Correct Answer: both(b) & (c)
Correct Answer: automobiles exhaust.
Correct Answer: Electrostatic precipitator
Correct Answer: micro-organisms
Correct Answer: 135
Correct Answer: persistent foam.
Correct Answer: 3000 (i.e. 0.3%)
Correct Answer: The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere.
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