Which of the following is the most widely used disinfectant in water treatment ?

Related Mcqs:

1. The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?

   A. Chlorine B. Alkalis C. Benzene hexachloride D. Alkyl benzene sulphonate (ABS)...

2. Which is the most widely used coagulant for the treatment of turbid water ?

   A. Alum (aluminium sulphate) B. Lime C. Ferric chloride D. Sodium aluminate...

3. During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

   A. Filtration B. Digestion C. Sedimentation D. Both B. and C....

4. In water treatment plant, zeolite process is used to remove the _____________ of water?

   A. Acidity B. Alkalinity C. Hardness D. Iron & zinc...

5. The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?

   A. Decreases B. Increases C. Remain constant D. May increase or decrease; depends on the chemical characteristics of polluted water...

6. The most commonly used chemical coagulant in water treatment is________________?

   A. Ferrous sulphate B. Alum C. Lime D. Hydrazine...

7. In water treatment, alum [Al2(SO4)3] is used for the process of __________________?

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

8. Tri-sodium phosphate is used in boiler water treatment to reduce____________________?

   A. Turbidity B. Caustic embrittlement C. Suspended silica D. Dissolved oxygen...

9. 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_________________?

   A. Ozone and iodine B. Chlorine or its compounds C. Ultraviolet light for irradiation of water D. All A., B. & C....

10. Which of the following processes is involved in the biochemical treatment of sewage effluents ?

    A. Oxidation B. Reduction C. Dehydration D. Fermentation...