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.Management Sciences
Category: Fuels and Combustion
Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?
0
A. Sensible
B. Latent
C. Sensible and latent
D. None of these
Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
A. Carburetted water gas
B. Blast furnace gas
C. Natural gas
D. Producers’ gas
Which of the following is not a manufactured fuel ?
A. Furnace oil
B. Bagasse
C. Semi-coke
D. Kerosene
Coke having higher porosity has ___________________?
A. Lower bulk density
B. Lower strength
C. Higher reactivity
D. All A., B. and C.
Carbon Content by weight in air dried wood may be about _______________ percent?
A. 10
B. 25
C. 50
D. 80
Coke oven gas constitutes mainly of ____________________?
A. H2 & CO
B. H2 & CH4
C. CH4 & CO
D. H2 & CO2
Use of excess of combustion air in the combustion of fuels results in__________________?
A. Heat losses
B. Long flame
C. Condensation of water vapour from the fuel gas
D. None of these
Kopper-Totzek coal gasifier_________________?
A. Can give ammonia synthesis gas (H2 + N2)
B. Is a moving bed reactor
C. Cannot use coking coal
D. Operate at very high pressure
Yield of blast furnace gas is about _______________ Nm3 /ton of pig iron?
A. 300
B. 2000
C. 5000
D. 10000
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