A. Angle of repose of coal increases with its increasing size
B. Specific gravity of coal increases with its increasing maturity
C. Refractive index and reflectance of coal increases with the increasing rank of coal
D. Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H
ratio of coal
Fuels and Combustion
Fuels and Combustion
A. Solid fuels
B. Gaseous fuels
C. Liquid fuels
D. Fat coals
A. Inadequate ventilation
B. Low temperature oxidation
C. Storage in large heaps with small surface to volume ratio
D. All A., B. and C.
A. Tar
B. Coke oven gas
C. Pitch
D. Pulverised coke
A. Calorific value increases
B. Swelling number decreases
C. Swelling number increases
D. Bulk density decreases
A. Tar
B. Molasses
C. Pitch
D. Line
A. Natural gas
B. Coal bed methane (CBM)
C. Liquefied petroleum gas (LPG)
D. Sewage gas
A. CO
B. CO2
C. O2
D. H2O
A. Blast furnace coke
B. Low temperature coke
C. Anthracite coal
D. Sub-bituminous coal
A. < 120
B. > 120
C. > 280
D. 300-600
