Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier?
A. Entrained
B. Moving
C. Fixed
D. Fluidised
Fuels and Combustion
Ionisation potential applied across the electrodes of electrostatic tar precipitator is around_____________________?
Ionisation potential applied across the electrodes of electrostatic tar precipitator is around_____________________?
A. 230 V AC
B. 60 KV AC
C. 230 V DC
D. 60 KV DC
Coal 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. Olefins
Hard coke is manufactured from___________________?
Hard coke is manufactured from___________________?
A. Lignite
B. Bituminous coal
C. Semi-anthracite
D. Anthracite
Which of the following is a primary fuel ?
Which of the following is a primary fuel ?
A. Blast furnace coke
B. Gasoline
C. Natural gas
D. Wood charcoal
Coking time in narrow by-product coke ovens is around ______________ hours?
Coking time in narrow by-product coke ovens is around ______________ hours?
A. 18
B. 48
C. 8
D. 80
Too much of excess air in combustion results in high___________________?
Too much of excess air in combustion results in high___________________?
A. Fuel consumption for the same heat load
B. Stack gas temperature
C. Percentage of oxygen in flue gases
D. All A., B. and C.
Washing of coal is done to reduce the_________________?
Washing of coal is done to reduce the_________________?
A. Inherent impurities
B. Adhering impurities
C. Mineral matter
D. Both B. and C.
Efficient burning of anthracite coal requires______________________?
Efficient burning of anthracite coal requires______________________?
A. Low preheat of air
B. Fine grinding
C. High excess air
D. All A., B. and C
Water gas constitutes mainly of __________________?
Water gas constitutes mainly of __________________?
A. CO & H2
B. CO & N2
C. CO2 & H2
D. CH4 & H2