Nitric acid
Sulphuric acid
Chloralkali
Iron & steel
✅ The correct answer is option B.
Enviornmental Engineering MCQs
World environment day is observed every year on the 5th of
June
December
July
September
✅ The correct answer is option A.
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.
5
500
1000
2000
✅ The correct answer is option A.
The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the
Catalytic conversion
Green house effect
Global warming
Both B and C
✅ The correct answer is option D.
Reingleman chart No. 2 corresponds to __________ percent black smoke.
10
20
40
80
✅ The correct answer is option C.
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes
Cancer
Silicosis
Respiratory disease (e.g., asthma)
Reduced crop yield
✅ The correct answer is option A.
Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.
10 to 20
100 to 200
1500 to 2500
4000 to 5000
✅ The correct answer is option B.
Reinglemann chart is used for the measurement of the
Combustibles present in automobile exhaust
Smoke density from a chimey
Exhaust gas density
Flue gas temperature
✅ The correct answer is option B.
Green house effect is accentuated by
Deforestation
Rapid industrialisation
Increased transportation activity
All of the above
✅ The correct answer is option D.
Scale formation in boiler is controlled by
Preheating of feed water
Reduction in hardness, silica & alumina in feed water
Keeping the pH value of feed water just below 7
Eliminating H₂S in feed water
✅ The correct answer is option B.