The liquid used for the washing of coal in an industrial coal washery is a mixture of water and ____________________?
A. Carbon tetrachloride
B. Sand (40%)
C. Mineral oil of high viscosity & specific gravity (1.6)
D. None of these
A. Carbon tetrachloride
B. Sand (40%)
C. Mineral oil of high viscosity & specific gravity (1.6)
D. None of these
A. Moisture
B. Ash
C. Volatiles
D. Carbon
A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these
The combustion reaction, C + O2 = CO2, is ___________________? Read More »
Fuels and Combustion A. Gravimetric analysis of flue gas
B. Finding out combustion efficiency
C. Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride
D. None of these
Orsat apparatus is meant for ___________________? Read More »
Fuels and Combustion A. 60
B. 160
C. 500
D. 750
A. CO
B. CH4
C. CO2
D. S
A. 8800 kcal/m3
B. 8800 kcal/kg
C. Same as that of coal middling
D. 25000 kcal/kg
A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
B. It reduces its calorific value tremendously
C. It reduces its flame temperature tremendously
D. There are chances of explosion during preheating
A. Bomb
B. Boy’s
C. Junkers
D. None of these
A. 500
B. 1500
C. 6500
D. 20000
Calorific value of bituminous coal may be around ______________ Kcal/kg? Read More »
Fuels and Combustion