Related Questions

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 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
Coking time in narrow by-product coke ovens is around __________ hours.
A 18
B 48
C 8
D 80
Undercharging of coal in the by-product coke ovens results in
A Decrease in the c.v. of coke oven gas
B Increase in its throughput
C Increase in the c.v. of coke oven gas
D No change in the c.v. of coke oven gas
High rate of heating of coke ovens
A May damage its walls due to abrupt excessive swelling of coal
B Produces larger size coke
C Increases the time of carbonisation
D None of these
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred
A Through a metallic wall
B By direct contact of hot flue gas with air
C By heating an intermediate material (like chequor bricks) and then heating the air from this hot material
D None of these
Compound coke ovens are those which can be heated by
A Both steam and electrical power
B Lean gas (e.g., B.F. gas)
C Rich gas (e.g., coke oven gas)
D Both B and C
Preheating of coal charge for the coke ovens reduces the
A Time of carbonisation
B Yield of gas and tar
C Fuel consumption in coking
D All of the above
Flue gas from the heating chamber of byproduct coke ovens is removed by
A Forced draft fan
B Induced draft fan
C Steam ejector
D Natural draft
Coke ovens in steel plant are heated by
A Electricity
B Coke oven gas
C Mixed gas
D Both B & C

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