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.Management Sciences
Category: Fuels and Combustion
Which of the following fuel gases is heavier than air ?
A. Blast furnace gas
B. Coke oven gas
C. Natural gas
D. Water gas
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
Coke oven gas burns with a yellowish flame, because of the presence of __________________?
A. CO2
B. CH4
C. H2
D. NH3
The calorific value of L.D. converter gas is about ____________ Kcal/Nm3?
A. 1800
B. 800
C. 4500
D. 10000
Low temperature oxidation of stored coal results in the________________?
A. Decrease in its caking power & calorific value
B. Decrease in its carbon & hydrogen content
C. Increase in its oxygen content
D. All A., B. and A.
Purity of coke means that, it is high in carbon and low in __________________?
A. Volatiles
B. Ash
C. Iron
D. Moisture
C/H ratio is the minimum in case of_________________?
A. Furnace oil
B. Natural gas
C. Coal
D. Naphtha
Fussain _____________________?
A. Is friable, charcoal like substance
B. Has highest fixed carbon and lowest volatile matter content of all the four banded components
of coal
C. Is non-coking, but when blended with highly coking coal, controls its swelling and produces
high strength coke on carbonisation
D. All A., B. and C.
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of_______________?
A. Tar
B. Benzol
C. Ammonia
D. None of these
Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?
A. KOH
B. Ammoniacal cuprous chloride
C. Pyrogallol solution
D. None of these
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