Removal of ______________ results from the disinfection of water?

Related Mcqs:

1. 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.

2. 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)

3. Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?

   A. Food industry
   B. Municipal sewage treatment
   C. Petroleum refinery
   D. Iron & steel plant

4. Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas ?

   A. Packed scrubber
   B. Gravity settling chamber
   C. Electrostatic precipitator
   D. Hydrocyclone

5. Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?

   A. Gravity settling chamber
   B. Cyclone separator
   C. Electrostatic precipitator
   D. Bag filter

6. Disinfection of water is done to remove ______________________?

   A. Color
   B. Bad taste
   C. Foul odour
   D. Bacteria

7. Removal of ______________ is accomplished by aeration of water?

   A. Dissolved gases
   B. Suspended solids
   C. Dissolved solids
   D. None of these

8. Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?

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

9. Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal ?

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

10. Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

    A. Sedimentation tank
    B. Circular clarifier
    C. Mechanical flocculation
    D. Chemical coagulation