Related Questions

In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.
A Difference in gross & net calorific value of the coke oven gas
B Free carbon content in tar
C Yield percentage of coke
D Yield of ammonia present in coke oven gas
In high temperature carbonisation of coal compared to low temperature carbonisation
A Yield of ammonia is less
B Aromatic content of tar is low
C H2 content in the coke oven gas is more
D Calorific value of the coke oven gas is lower
In high temperature carbonisation (as compared to low temperature carbonisation) of coal
A Coke oven gas yield is more
B Tar yield is less but free carbon in tar is more
C Calorific value of coke oven gas is less
D All of the above
In low temperature carbonisation (as compared to high temperature carbonisation) of coal
A Ammonia yield is more
B Aliphatic tar is produced
C Free carbon in tar is more
D All of the above
In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the
A Gas yield is less
B Tar yield is more
C Ignition temperature of coke produced is less
D Aromatic content of tar produced is more
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
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
Blast furnace gas compared to coke oven gas has
A Lower ignition temperature
B Narrower limit of inflammability
C Higher calorific value
D Lower theoretical flame temperature
Coke oven gas compared to blast furnace gas is
A More explosive and inflammable
B Less poisonous
C Lighter
D All of the above
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.
A 2.5
B 0.5
C 10
D 20

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