Curioustab
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Home
»
Chemical Engineering
»
Environmental Engineering
Which of the following is not a natural source of air pollution?
Volcanic eruptions and lightening discharges.
Biological decay of vegetable matter.
Photochemical oxidation of organic matter.
None of these.
Correct Answer:
None of these.
← Previous Question
Next Question→
More Questions from
Environmental Engineering
The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
Disinfection of water is done to remove
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
Photochemical smog is formed from automobile exhaust
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m2/hr.
Pick out the wrong statement.
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.
Water filtration rate in a slow sand filter ranges from __________ litres/m2/hr.
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.
Discussion & Comments
No comments yet. Be the first to comment!
Name:
Comment:
Post Comment
Join Discussion
Discussion & Comments