A. Reduces its sulphur and ash content
B. Controls its ash fusibility and increases its calorific value
C. Improves its coking properties
D. All A., B. and C.
Washing of coal________________? Read More »
Fuels and Combustion A. Origin of petroleum oil
B. Origin of coal
C. Coalification
D. Variation of coal quality with depth
Insitu theory and drift theory are related to the____________________? Read More »
Fuels and Combustion A. Colour
B. Moisture content
C. Ash content
D. Volatile matter
A. Incomplete combustion
B. Dry gas/stack gas loss
C. Moisture loss
D. All A., B. and C.
Fuel combustion is never cent per cent efficient due to___________________? Read More »
Fuels and Combustion A. Fixed carbon
B. Volatile matter
C. Ash
D. Oxygen
A coal with high _____________ content, would ignite most easily? Read More »
Fuels and Combustion A. Blast furnace gas
B. Natural gas
C. Producer gas
D. Water gas
A. Produces more slag when used in the blast furnace
B. Has poor strength and abrasion resistance
C. Is desirable in producer gas manufacture
D. None of these
High ash containing coke____________________? Read More »
Fuels and Combustion A. Caking power
B. Calorific value
C. Hydrogen content
D. Oxygen content
A. Contains more than 90% durain
B. Contains more than 90% fussain
C. Contains mainly vitrain & clarain and is generally coking
D. Is non-coking
Bright coal__________________? Read More »
Fuels and Combustion A. 1 to 2
B. 3 to 4
C. 5 to 15
D. 20 to 40
