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
Narrow coke ovens as compared to wider coke ovens
A Produce smaller coke
B Produce stronger coke
C Require less time of carbonisation
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
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
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
Undercharging
A Reduces specific gravity of the electrolyte
B Increases specific gravity of the electrolyte
C Produces excessive gassing
D Increases the temperature
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.
A 15 to 25
B 35 to 45
C 55 to 75
D 75
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

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