A. Aluminium sulphate
B. Ferrous sulphate
C. Hydrated lime
D. Chloramine
A. Respiratory ailments (e.g. bronchitis)
B. Skin diseases (e.g. dermatitis)
C. Silicosis
D. Blurred vision
A. Ozone and iodine
B. Chlorine or its compounds
C. Ultraviolet light for irradiation of water
D. All A., B. & C.
A. Dental cavities
B. Scale formation
C. Water-borne disease
D. Corrosion
A. Turbidity
B. Color (Hazen)
C. Total solids
D. All A., B. & C.
A. Preheating of feed water
B. Reduction in hardness, silica & alumina in feed water
C. Keeg the pH value of feed water just below 7
D. Eliminating H2S in feed water
A. Biological oxygen treatment
B. Coagulation and filtration
C. Adsorption in ion exchange materials
D. None of these