Mott and Wheeler test is conducted on coke to find its _____________________?

Related Mcqs:

1. 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.

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. 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

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. Percentage of methane in coke oven gas may be around _____________________?

   A. 5
   B. 15
   C. 25
   D. 50

7. Coke oven gas is stripped of its H2S and mercaptans content by_________________?

   A. Absorption in wash oil
   B. Adsorption on bog iron bed
   C. Bubbling it through dilute sulphuric acid
   D. Adsorption on silica gel

8. 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.

9. Presence of free moisture in coal during its high temperature carbonisation _____________________?

   A. Reduces the coking time
   B. Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot
   oven walls
   C. Increases the loss of fine coal dust from the ovens when charging
   D. None of these

10. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

    A. 30
    B. 300
    C. 3,000
    D. 30,000