Percentage of methane in coke oven gas may be around _____________________?
Percentage of methane in coke oven gas may be around _____________________?
A. 5
B. 15
C. 25
D. 50
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The bright glow of a combustion process is the characteristic of ______________ temperature oxidation of coal?
The bright glow of a combustion process is the characteristic of ______________ temperature oxidation of coal?A. Fast & high
B. Slow & low
C. Slow & high
D. Fast & slowMain use of hard coke produced by high temperature carbonisation is in the ____________________ ?
Main use of hard coke produced by high temperature carbonisation is in the ____________________ ?A. Iron blast furnace
B. Cupola in foundries
C. Sinter making
D. Domestic ovensEschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?A. MgO & Na2CO3
B. MgSO4 & BaCl2
C. BaSO4 & NaCl
D. MgCO3 & NaClWhich of the following petrographic constituents of coal is non-coking ?
Which of the following petrographic constituents of coal is non-coking ?A. Vitrain
B. Clarain
C. Durain
D. FussainCalorific value of dry wood may be around ______________ Kcal/kg?
Calorific value of dry wood may be around ______________ Kcal/kg?A. 5
B. 50
C. 500
D. 5000Gobar gas is produced by the _______________ of ‘gobar’ (cow dung) ?
Gobar gas is produced by the _______________ of ‘gobar’ (cow dung) ?A. Hydrolysis
B. Fermentation
C. Oxidation
D. Dehydration