A. CO2
B. CH4
C. H2
D. NH3
Related Mcqs:
- Blast furnace gas burns with a bluish flame, because of the presence of____________________?
A. CO
B. CH4
C. CO2
D. S - Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?
A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
B. It reduces its calorific value tremendously
C. It reduces its flame temperature tremendously
D. There are chances of explosion during preheating - 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. - Coke oven gas constitutes mainly of ____________________?
A. H2 & CO
B. H2 & CH4
C. CH4 & CO
D. H2 & CO2 - Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about _______________ percent?
A. 5
B. 25
C. 55
D. 75 - 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. - Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant ?
A. Silica gel
B. Diatomaceous earth
C. Basalt
D. Bog iron (i.e., moist ferric hydroxide)
