Curioustab

Home » Chemical Engineering » Environmental Engineering

Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

75
95
120
140

Correct Answer: 95

← Previous Question Next Question→

More Questions from Environmental Engineering

Nitrogen oxides (NOx) is not produced in the __________ industry.
Peroxyacyl nitrate (PAN), a pollutant is found in the
Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds __________ percent (by volume).
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.
Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
Presence of bacteria in potable (drinking) water causes
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
Ozone level is generally found to be depleted in India in the month of
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion