Which of the following is coking ?
Which of the following is coking ?
A. Vitrain
B. Fussain
C. Both A. & B.
D. Neither A. nor B.
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With increase in calorific value of fuels, their adiabatic flame temperatures
Question: With increase in calorific value of fuels, their adiabatic flame temperatures
[A].increase [B].
decrease [C].
remain unchanged [D].
may increase or decrease ; depends on the quantity of products of combustion Answer: Option D
Explanation:
No answer description available for this question.
Blast furnace gas burns with a bluish flame, because of the presence of____________________?
Blast furnace gas burns with a bluish flame, because of the presence of____________________?A. CO
B. CH4
C. CO2
D. SCoal tar (produced by high temperature carbonisation) is the main source of_________________?
Coal tar (produced by high temperature carbonisation) is the main source of_________________?A. Aromatic compounds
B. Aliphatic compounds
C. Paraffins
D. OlefinsHeight of coke oven is limited (say maximum upto 7 metres) mainly by the_____________________?
Height of coke oven is limited (say maximum upto 7 metres) mainly by the_____________________?A. Problem of uniform heating along its height
B. Structural strength of silica bricks
C. Problem in door cleaning
D. Buckling of ram of pusher car at the time of coke pushingSometimes water is sprayed during coal charging in the coke oven, which helps in ________________?
Sometimes water is sprayed during coal charging in the coke oven, which helps in ________________?A. Prevention of clinker formation in the oven
B. Controlling the dust nuisance while charging the coal
C. Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO &
H2 in the gas (due to the endothermic reaction represented by C + H2O = CO + H2)
D. All A., B. and C.The combustion reaction, C + O2 = CO2, is ___________________?
The combustion reaction, C + O2 = CO2, is ___________________?A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these