Related Questions

Prime coking coal is always blended with medium or non- coking coal before ear-bonisation
A To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls
B Because, it alone produces unreactive coke
C Both A & B
D Neither A nor B
The coking process normally mostly used in Indian oil refineries is the __________ coking process.
A Delayed
B Flexi
C Fluid
D Contact
Very __________ coals are completely devoid of cokability i.e, it is non coking.
A Young
B Mature
C Both A & B
D Neither A nor B
Coking coals are invariably
A Lignites
B Bituminous coals
C Semi-anthracites
D Anthracites
'Fat coals' are those coals which have very high
A Caking capacity
B Volatile matter content
C Fusion point of its ash
D Inherent moisture content
Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke?
A Naphtha
B Vacuum residue
C Light gas oil
D Diesel
Which of the following petrographic constituents of coal is non-coking?
A Durain
B Vitrain
C Clarain
D Fussain
A good coking coal should have high __________ content.
A Ash
B Sulphur & phosphorus
C Moisture
D None of these
Coking time in beehive coke oven is about
A 12 hours
B 2-3 days
C One week
D Two weeks
During coking of coal, the ash content (percentage)
A Increases
B Decreases
C Remains constant
D None of these

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