Coke oven gas burns with a yellowish flame, because of the presence of __________________?
A. CO2
B. CH4
C. H2
D. NH3
Fuels and Combustion
With increase in moisture content of coal, its___________________?
With increase in moisture content of coal, its___________________?
A. Calorific value increases
B. Caking properties diminish
C. Swelling during carbonisation becomes excessive
D. None of these
In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________________?
In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________________?
A. Increase in gas pressure
B. Increase in temperature (i.e. preheating)
C. Use of pure oxygen for combustion instead of air
D. All A., B. & C.
Traces of tar fog present in the coke oven gas is removed by_________________?
Traces of tar fog present in the coke oven gas is removed by_________________?
A. Cyclone separator
B. Wet packed scrubber
C. Electrostatic precipitator
D. Washing with monoethanolamine
C/H ratio is the maximum in case of_________________?
C/H ratio is the maximum in case of_________________?
A. Coal
B. Furnace oil
C. Natural gas
D. Naphtha
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 & slow
Largest constituent of blast furnace gas is__________________?
Largest constituent of blast furnace gas is__________________?
A. N2
B. CO
C. CO2
D. H2
A travelling grate stoker is meant for the efficient burning of ______________ coal?
A travelling grate stoker is meant for the efficient burning of ______________ coal?
A. Caking
B. Pulverised
C. Non-caking
D. High ash
Lurgi coal gasifier is a pressurised ______________ bed reactor?
Lurgi coal gasifier is a pressurised ______________ bed reactor?
A. Moving
B. Fixed
C. Fluidised
D. Entrained
The fuel ratio of a coal is__________________?
The fuel ratio of a coal is__________________?
A. The ratio of its percentage of fixed carbon to that of volatile matter
B. Helpful in estimation of its rank
C. Both A. and B.
D. Neither A. nor B.