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Fuels and Combustion MCQs

Chemical Engineering Objective Questions

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253. Which of the following has the highest heat of combustion?
A. H2
B. CO
C. CH4
D. C2H6
Discussion
254. Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction?
A. 2CO ⟷ C + CO2
B. CO + H2O ⟷ CO2 + H2
C. C + H2O ⟷ CO + H2
D. C + 2H2O ⟷ CO2 + 2H2
Discussion
255. Overfire burning in a furnace is a phenomenon characterised by the
A. Supply of excess fuel
B. Supply of excess air
C. Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
D. None of these
Discussion
256. Which of the following has the highest theoretical flame temperature ?
A. Blast furnace gas
B. Hydrogen
C. Acetylene
D. Coke oven gas
Discussion
257. Fischer-Tropsch method aims at the
A. Gasification of coal
B. Synthesis of gasoline (from water gas)
C. Hydrogenation of coal to produce gasoline
D. None of these
Discussion
258. The liquid used for the washing of coal in an industrial coal washery is a mixture of water and
A. Carbon tetrachloride
B. Sand (40%)
C. Mineral oil of high viscosity & specific gravity (1.6)
D. None of these
Discussion
259. A coal having high amount of volatile matter
A. Would require smaller combustion chamber
B. Produces very little of tar and gas on carbonisation
C. Ignites easily and burns with long smoky flame
D. All of the above
Discussion

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