Fuel consumption in coke making can be reduced by___________________?

Related Mcqs:

1. Degree of carbonisation of coal during coke making can be roughly judged by the ______________ of the coke produced?

   A. Colour
   B. Moisture content
   C. Ash content
   D. Volatile matter

2. Narrow coke ovens as compared to wider coke ovens_________________?

   A. Produce smaller coke
   B. Produce stronger coke
   C. Require less time of carbonisation
   D. All A., B. and C.

3. Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?

   A. Facilitate easy discharging of coke as it swells during carbonisation
   B. Facilitate uniform heating of the oven
   C. Increase the output of the coke
   D. None of these

4. Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________?

   A. Less reactive
   B. Stronger
   C. Smaller in size
   D. All A., B. & C.

5. During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the _______________ of the mass?

   A. Density
   B. Porosity
   C. Electrical resistivity
   D. None of these

6. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?

   A. 5
   B. 10
   C. 20
   D. 35

7. ‘Fuel’ can be defined as a substance which produces heat by___________________?

   A. Combustion
   B. Nuclear fission
   C. Nuclear fusion
   D. All A., B. & C.

8. Main use of soft coke is as _______________ fuel?

   A. Domestic
   B. Blast furnace
   C. Foundry
   D. None of these

9. Coke oven gas is a better fuel than blast furnace gas, because of its higher________________?

   A. Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
   B. Adiabatic flame temperature
   C. Heat release rate (thus requiring smaller combustion chamber)
   D. All A., B. and C.

10. Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?

    A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
    B. It reduces its calorific value tremendously
    C. It reduces its flame temperature tremendously
    D. There are chances of explosion during preheating