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
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
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
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
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
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
Coking time in narrow by-product coke ovens is around __________ hours.
A 18
B 48
C 8
D 80

Next steps