Flue gas discharge velocity through chimney of a big thermal power plant may be around ________________ m/sec?

Related Mcqs:

1. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_________________?

   A. Tar
   B. Coke oven gas
   C. Pitch
   D. Pulverised coke

2. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?

   A. Tar
   B. Sulphide Coke
   C. Coke Oven Gas
   D. Pulverised coke

   Submitted by: Muhammad Mutsadiq Umer

3. Stack (chimney) height in a big thermal power plant is dictated by the___________________?

   A. Pollution control aspect
   B. Draught to be created
   C. Limitation of constructional facilities
   D. None of these

4. Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of__________________?

   A. Less air for combustion
   B. Correct amount of air for combustion
   C. Too much air for combustion
   D. Pulverised coal in boilers

5. 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

6. For maximum discharge through a chimney, its height should be___________________?

   A. 200 meters
   B. Infinitely long
   C. More than 105.7 metres
   D. Equal to the height of the hot gas column producing draught

7. When incomplete combustion loss is high, the flue gas analysis shows large amount of ________________?

   A. CO2
   B. CO
   C. O2
   D. C

8. 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

9. Which of the following fuels is generally not used in thermal power plant boiler firing ?

   A. Furnace oil, light diesel oil and tar/PCM
   B. Pulverised coking coal
   C. Coal middling from washeries
   D. B.F. gas, coke oven gas and L.D. converter gas

10. Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?

    A. Ammonium sulphate
    B. Ammonium nitrate
    C. Ammonium phosphate
    D. None of these