Related Questions

'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
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
Coking coals are invariably
A Lignites
B Bituminous coals
C Semi-anthracites
D Anthracites
Most of the coking coals are
A Anthracite
B Bituminous
C Lignite
D None of these
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 a commercial high temperature coal carbonisation plant is about __________ hours.
A 6
B 18
C 28
D 36
Coking time in narrow by-product coke ovens is around __________ hours.
A 18
B 48
C 8
D 80
Volatile matter content in coking coal may be about __________ percent.
A 1
B 7
C 22
D 46

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