Fuels and Combustion

A. Emissivity factor is higher
B. Sulphur content is lower
C. Flue gas has lower dew point thereby facilitating more waste heat recovery
D. All A., B. and C.

A. Smoke
B. Temperature
C. Oxygen
D. Carbon monoxide

A. Young
B. Mature
C. Both A & B
D. Neither A nor B

A. Increased fuel consumption
B. Incomplete combustion
C. Smoky flame
D. None of these

A. Reactivity
B. Porosity
C. Bulk density
D. Hardness & strength

A. Hydrogen
B. Carbon monoxide
C. Acetylene
D. Methane

A. Should have high porosity
B. Should be brittle
C. Must contain moderate quantities of ash, moisture, sulphur and volatile matters
D. Should have low fusion point of its ash

A. Only CO
B. Both CO and CO2
C. Both CO and O2
D. All CO, CO2, and O2

A. Carbon monoxide
B. Hydrocarbons
C. Hydrogen
D. Oxygen

A. CO (upto 65%) & CO2
B. CO2 & H2
C. CO & O2
D. CO2 & O2