Ferrous sulphate
Alum
Lime
Hydrazine
✅ The correct answer is option B.
Enviornmental Engineering MCQs
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
Blood poisoning
Anaemia
Nervous system disorder
All of the above
✅ The correct answer is option D.
Which of the following is not a natural source of air pollution?
Volcanic eruptions and lightening discharges
Biological decay of vegetable matter
Photochemical oxidation of organic matter
None of these
✅ The correct answer is option D.
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?
Benzopyrene
Peroxyacyl nitrate
Carbon monoxide
Sulphur dioxide
✅ The correct answer is option C.
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
2
42
332
1050
✅ The correct answer is option B.
In a sedimentation tank, the detention period for water ranges from __________ hours.
2 to 4
8 to 12
16 to 20
24 to 32
✅ The correct answer is option A.
Lagooning process is mainly a means of the
Sludge disposal
Reduction of excessive flow in sewers
Biological treatment of wastes
None of these
✅ The correct answer is option A.
Which of the following industries discharge mercury as a pollutant?
Chloro-alkali industry
Tanneries
Beverage plant
Phosphoric acid plant
✅ The correct answer is option A.
Tolerable limit of nitrogen oxides in air is __________ ppm.
0.1
1
5
25
✅ The correct answer is option C.
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
1
5
50
500
✅ The correct answer is option B.