Sulphur content of fuels is very important to the plant operators because it____________________?

Related Mcqs:

1. Sulphur content in diesel oil should not be more than_________________?

   A. 10%
   B. 5%
   C. 1%
   D. 0.1%
   E. 0.01%

2. The natural solid fuels are : ________?

   A. Wood
   B. Peat
   C. Lignite
   D. All of above

   Submitted by: Faheem Zaman Dhaunroo

3. Which is not correct statement about effect of sulphur in fuel ___________________?

   A. it has heating value
   B. it helps in electrostatic precipitation of ash in flue-gases
   C. it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
   D. it erodes furnace walls
   E. none of the above

4. Sulphur in coal results in___________________?

   A. causing clinkering and slagging
   B. corroding air heaters
   C. spontaneous combustion during coal storage
   D. facilitating ash precipitation
   E. all of the above

5. Sulphur in pig iron tends to make it___________________?

   A. hard’
   B. soft
   C. ductile
   D. tough
   E. malleable

6. Sulphur in steel________________?

   A. acts as deoxidiser
   B. reduces the grain size
   C. decreases tensile strength and hardness
   D. lowers the toughness and transverse ductility
   E. increases hardness

7. The presence of sulphur in pig iron makes__________________?

   A. it easily machinable
   B. it brittle
   C. it hard
   D. the casting unsound
   E. increases the fluidity

8. The bituminous coal is non-caking if its carbon content is_______________?

   A. 78-81%
   B. 81-85%
   C. 85-90%
   D. 90-95%
   E. 95-100%.

9. 02 content in atmospheric air on volume basis is___________________?

   A. 21%
   B. 23%
   D. 30%
   D. 40%
   E. 70%

10. Which of the following solid fuel has high carbon content?

    A. Coke
    B. Coal
    C. Peat
    D. None of these

    Submitted by: Faheem Zaman Dhaunroo