Producer gas containing least amount of tar is produced by the_________________?

Related Mcqs:

1. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the_________________?

   A. Presence of large quantity of hydrogen in the fuel
   B. Low calorific value of the fuel
   C. High sulphur content in the fuel
   D. Lack of thorough mixing of fuel with air

2. Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about _______________ percent?

   A. 5
   B. 25
   C. 55
   D. 75

3. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

4. Coal tar (produced by high temperature carbonisation) is the main source of_________________?

   A. Aromatic compounds
   B. Aliphatic compounds
   C. Paraffins
   D. Olefins

5. Coal tar (produced by high temperature carbonization) is the main source of_________?

   A. Aromatic compounds
   B. Aliphatic compounds
   C. Paraffins
   D. Olefins

   Submitted by: Muhammad Mutsadiq Umer

6. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?

   A. More
   B. Less
   C. Same
   D. Data insufficient; can’t be predicted

7. Traces of tar fog present in the coke oven gas is removed by_________________?

   A. Cyclone separator
   B. Wet packed scrubber
   C. Electrostatic precipitator
   D. Washing with monoethanolamine

8. Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the_______________?

   A. Hot scarfing of steel slabs
   B. Mixing with blast furnace gas
   C. Coke oven battery heating
   D. Steel ladle drying

9. Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?

   A. Higher calorific value
   B. Lower hydrogen content
   C. Both A. and B.
   D. Neither A. nor B.

10. Main constituent of the gas produced from a gobar gas plant is___________________?

    A. CO2
    B. CH4
    C. H2
    D. CO