Chemical Environmental Engineering

A. Hydrocarbons
B. NOx
C. SO2
D. CO

A. Diameter
B. Inlet gas velocity
C. Overall height
D. All A., B. & C.

A. Pipe vibrations
B. Cavitation
C. Boundary layer separation
D. Fluctuation in liquid flow

A. With greater number of blades
B. Of increased diameter
C. Both A. & B.
D. Neither A. nor B.

A. CO, CO2 & SO2
B. H2S, NO & SO3
C. CO2, H2S & NO2
D. SO3, NO2 & CO2

A. Oxidation
B. Imhoff tank
C. Lagoon
D. Skimming tank

A. Biological oxygen pond
B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
C. Lagoons
D. Filtration

A. Bronchitis
B. Silicosis
C. Pneumoconiosis
D. None of these

A. Grit
B. Dust
C. Powder
D. Smoke

A. By chemical coagulation
B. In sedimentation tanks equipped with mechanical scrapper
C. In vacuum filter
D. In clarifiers