In large thermal power stations very fine particulates present in flue gas are removed by___________________?

Related Mcqs:

1. 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

2. Fine grit present in sewage is removed in the _____________ during sewage treatment?

   A. Grit chamber
   B. Detritus tank
   C. Trickling filter
   D. Skimming tank

3. Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called_________________?

   A. Fumes
   B. Mists
   C. Smoke
   D. Aerosols

4. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

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

5. Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?

   A. Moderately
   B. Highly
   C. Extremely
   D. Very extremely

6. Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?

   A. Chemical coagulation
   B. Floatation & skimming
   C. Centrifugation
   D. Ultra filtration

7. Iron & manganese present as pollutant in water cannot be removed by__________________?

   A. Ion exchange process
   B. Oxidation followed by settling & filtration
   C. Lime soda process or manganese zeolite process
   D. Chlorination

8. H2S present in gaseous stream can be removed by adsorption on _____________________?

   A. Silica gel
   B. Active carbon
   C. Bog iron
   D. Limestone powder

9. Radioactive substances present in the polluted water stream can be removed by_________________?

   A. Biological oxygen treatment
   B. Coagulation and filtration
   C. Adsorption in ion exchange materials
   D. None of these

10. Soluble silica present in boiler feed water can be removed by______________________?

    A. Coagulation
    B. Filtration
    C. Anion exchanger
    D. Preheating it