A. 10
B. 25
C. 45
D. 60
Related Mcqs:
- Removal of hydrogen from coke oven gas ___________________?
A. Increases its calorific value
B. Decreases its calorific value
C. Does not alter its calorific value
D. Is not possible on commercial scale - Percentage of methane in coke oven gas may be around _____________________?
A. 5
B. 15
C. 25
D. 50 - With increase in the time of carbonisation at a particular temperature (say 1000°C), the ______________ percentage in coke oven gas increases?
A. Hydrogen
B. Methane
C. Unsaturated hydrocarbons
D. All A., B. and C. - Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?
A. Facilitate easy discharging of coke as it swells during carbonisation
B. Facilitate uniform heating of the oven
C. Increase the output of the coke
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 is a better fuel than blast furnace gas, because of its higher________________?
A. Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
B. Adiabatic flame temperature
C. Heat release rate (thus requiring smaller combustion chamber)
D. All A., B. and C. - Coke oven gas compared to blast furnace gas is________________?
A. More explosive and inflammable
B. Less poisonous
C. Lighter
D. All A., B. and C. - Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?
A. 30
B. 300
C. 3,000
D. 30,000 - Coking time in beehive coke oven is about ___________________?
A. 12 hours
B. 2-3 days
C. One week
D. Two weeks - Coke oven gas burns with a yellowish flame, because of the presence of __________________?
A. CO2
B. CH4
C. H2
D. NH3
