Hydrogen sulphide
Mercury
Cadmium
Asbestos
✅ The correct answer is option C.
Chemical Engineering MCQs
Main pollutants released from iron & steel industry is
CO, CO₂ & SO₂
H₂S, NO & SO₃
CO₂, H₂S & NO₂
SO₃, NO₂ & CO₂
✅ The correct answer is option A.
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is
Inversely proportional to viscosity of gas
Proportional to the viscosity & density of the gas
Proportional to the pressure of the gas
Both B and C
✅ The correct answer is option D.
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
Asphyxiation (suffocation)
Shortness of breath
Tuberculosis
All of the above
✅ The correct answer is option D.
The common pollutant generated in chlor-alkali industry and battery manufacture is
Mercury
Brine
Phosphate
None of these
✅ The correct answer is option A.
Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
1-Feb
5-Oct
15-20
25-30
✅ The correct answer is option B.
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
Ozone and iodine
Chlorine or its compounds
Ultraviolet light for irradiation of water
All of the above
✅ The correct answer is option D.
Inhalation of silica dust causes a disease called
Bronchitis
Silicosis
Pneumoconiosis
None of these
✅ The correct answer is option B.
Removal of __________ is accomplished by aeration of water.
Dissolved gases
Suspended solids
Dissolved solids
None of these
✅ The correct answer is option A.
The lowest layer of atmosphere is known as the
Stratosphere
Troposphere
Ionosphere
None of these
✅ The correct answer is option B.