A. Vitrain
B. Clarain
C. Durain
D. Fussain
Which of the following petrographic constituents of coal is non-coking ? Read More »
Fuels and Combustion A. Neumann reversal
B. Shift conversion
C. Boudouard
D. Reduction
A. Is not undesirable
B. Reduces its calorific value
C. Badly affects the quality of steel
D. Increases its caking power
Presence of phosphorous in metallurgical coal__________________? Read More »
Fuels and Combustion A. Blast furnace gas
B. Coke oven gas
C. Water gas
D. Carburetted water gas
Which is the heaviest fuel gas out of the following ? Read More »
Fuels and Combustion A. 1300
B. 500
C. 4500
D. 9000
The calorific value of producer gas is around _____________ kcal/Nm3? Read More »
Fuels and Combustion A. High amount/current of combustion air
B. Low amount/current of combustion air
C. Preheated secondary air
D. Very little excess air
A. Use of thick fire bed
B. Low fusion point of ash (< 1100° C)
C. Use of preheated primary air
D. All A., B. & C.
A. 4000
B. 2500
C. 6500
D. 10000
A. Caking tendency
B. Coking tendency
C. Clinkering tendency
D. Size stability
Softening temperature of coal ash is a measure of the _____________ of coal? Read More »
Fuels and Combustion A. CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60
B. CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
C. CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06
D. CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74
