Ozone
Photochemical smog
Sulphur dioxide
All of the above
✅ The correct answer is option C.
Enviornmental Engineering MCQs
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.
105
135
160
185
✅ The correct answer is option B.
Presence of soluble organics in polluted water causes
Undesirable plants growth
Depletion of oxygen
Fire hazards
Explosion hazards
✅ The correct answer is option B.
Noise level inside a jet air liner in normal flight is about __________ decibels.
80
100
125
145
✅ The correct answer is option B.
Solid content in most of the domestic sewage is about __________ percent.
0.001
0.1
5
10
✅ The correct answer is option B.
Presence of __________ bacteria in water causes disease like typhoid.
Aerobic
Pathogenic
Anaerobic
Non-pathogenic
✅ The correct answer is option B.
Workers working in __________ industry are most prone to white lung cancer.
Coal mining
Limestone mining
Textile
Asbestos
✅ The correct answer is option C.
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
50
500
1000
3000 (i.e. 0.3%)
✅ The correct answer is option D.
The maximum CO₂ is emitted into the atmosphere by
Combustion
Urea
Biomass burning
Trees
✅ The correct answer is option A.
Average human body contains about __________ percent water by weight.
20
40
70
85
✅ The correct answer is option C.