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

Related Mcqs:

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

   A. 0.5
   B. 10
   C. 50
   D. 500

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. Coke oven gas
   C. Pitch
   D. Pulverised coke

3. 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

4. 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

5. 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

6. Stack heat losses can be minimised by________________?

   A. Controlling the excess air
   B. Oxygen enrichment of combustion air
   C. Using low c.v. fuels
   D. Maintaining proper draft in the furnace

7. 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

8. Natural draft created by the chimney depends upon _____________________?

   A. Temperature of the flue gas
   B. Its height
   C. Both A. & B.
   D. Neither A. nor B.

9. Natural draught produced by a chimney depends upon the _____________________?

   A. Density of the chimney gases
   B. Height of the chimney
   C. Both A. and B.
   D. Neither A. nor B.

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