SO₂
H₂S
CO
Hydrocarbons
✅ The correct answer is option D.
Enviornmental Engineering MCQs
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.
Reduce SO₂ content in
Catalytically convert SO₂ to SO₃ in
Increase the dew point of
None of these
✅ The correct answer is option A.
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
Of clotting of blood
Of jamming of respiratory tract
It forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen
It forms CO₂ by combining with oxygen present in the blood
✅ The correct answer is option C.
Smog is
Nothing but black smoke
A combination of smoke and fog
A liquid particle resulting from vapor condensation
A solid particle e.g. flyash
✅ The correct answer is option B.
World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in
Arizona (U.S.A.)
Chernobyl (undivided U.S.S.R.)
Pensylvania (U.S.A.)
Moscow (U.S.S.R.)
✅ The correct answer is option B.
Nitrogen oxides (NOx) is not produced in the __________ industry.
Nitric acid making
Nitrogenous fertiliser
Detergent
Any of these
✅ The correct answer is option C.
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
CO
SO₂
NOx
CFC (chloro fluoro carbons)
✅ The correct answer is option A.
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
25
50
80
120
✅ The correct answer is option C.
For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
10000
5
500
1000
✅ The correct answer is option B.
Which of the following plants does not emit appreciable amount of SO₂ in atmosphere?
Thermal power plant
Petroleum refinery
Nitric acid plant
Sulphuric acid plant
✅ The correct answer is option C.