Related Questions

Caking index of the coal blend used for the manufacture of metallurgical coke should be around
A 5
B 21
C 40
D 48
Caking index of coal blend used for blast furnace coke making is about
A 8
B 12
C 22
D 36
The bituminous coal is no caking if its carbon content is
A 78-81%
B 81-85%
C 85-90%
D 90-95%
Caking coal is desirable for
A Burning on travelling grate
B Coke making
C Burning on firebars
D All of the above
Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
A 1000
B 4000
C 6000
D 8000
Caking coals are those which
A Form lumps or masses of coke
B Burn freely
C Show little or no fusing action
D Burn completely
Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency
A Anthracite
B Lignite
C Semi-bituminous and bituminous
D All of the above
Powdery materials can be guarded against caking tendency on storage by
A Providing irregular grain size
B Providing minimum percentage of voids
C Having maximum possible points of contact
D None of these
Highly caking coals
A Produce weak coke
B Produce strong coke
C May damage the coke oven walls during carbonisation
D Both B and C
The caking of crystals can be prevented by
A Maintaining high critical humidity
B Maintaining low critical humidity
C Coating the product with inert material
D Both A and C

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