Chemical Engineering - Environmental Engineering

36.
Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.
coal ash
potassium cyanide
ortho-xylene
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
__________ can not control the noise pollution.
Use of silencers
Green house gases
Vibration damping
Tree plantation
Answer: Option
Explanation:
No answer description is available. Let's discuss.

38.
Ozone level is generally found to be depleted in India in the month of
February
July
April
December
Answer: Option
Explanation:
No answer description is available. Let's discuss.

39.
Noise level during normal conversation among men is about __________ decibles.
10
45
90
115
Answer: Option
Explanation:
No answer description is available. Let's discuss.

40.
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate' ?
Dust & mists
Smoke & fumes
Photochemical smog & soot
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.