Category: Chemical Environmental Engineering

A. Benzopyrene
B. Peroxyacetyl nitrate
C. Carbon monoxide
D. Sulphur dioxide

A. Insufficient supply of combustion air and insufficient time for combustion
B. Poor quality of fuel and improper mixing of fuel & combustion air
C. Poor design & overloading of furnace
D. All A., B. and C.

A. 30 to 70 kV DC
B. 30 to 70 kV AC
C. 230 V AC
D. 230 V DC

A. Chlorination
B. Treating in biological oxygen pond
C. Chemical coagulation
D. None of these

A. Lagooning
B. Activated carbon adsorption
C. Biological oxidation pond
D. Chemical coagulation

A. Coagulation
B. Sterilisation
C. Disinfection
D. Sedimentation

A. Foul smell and taste
B. Iron and manganese
C. Temporary hardness
D. Permanent hardness

A. Mercury
B. Brine
C. Phosphate
D. None of these

A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
B. Appears only on sunny days
C. Is harmful for crops and trees also besides causing eye irritation & asthma
D. All A., B. & C.

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