Which is the most matured coal ?
A. Lignite
B. Bituminous
C. Semi-anthracite
D. Anthracite
Fuels and Combustion
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ___________________?
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ___________________?
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.
Incomplete combustion of a fuel is characterised by the high _______________ in the flue gas?
Incomplete combustion of a fuel is characterised by the high _______________ in the flue gas?
A. Smoke
B. Temperature
C. Oxygen
D. Carbon monoxide
Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?
Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?
A. Young
B. Mature
C. Both A & B
D. Neither A nor B
High excess air in combustion of fuels results in____________________?
High excess air in combustion of fuels results in____________________?
A. Increased fuel consumption
B. Incomplete combustion
C. Smoky flame
D. None of these
“Micum Index” of a coke is a measure of its___________________?
“Micum Index” of a coke is a measure of its___________________?
A. Reactivity
B. Porosity
C. Bulk density
D. Hardness & strength
_____________ has the widest inflammability limit (explosion limit) of all the gases?
_____________ has the widest inflammability limit (explosion limit) of all the gases?
A. Hydrogen
B. Carbon monoxide
C. Acetylene
D. Methane
A good metallurgical coke___________________?
A good metallurgical coke___________________?
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
The cuprous chloride used in orsat apparatus can absorb___________________?
The cuprous chloride used in orsat apparatus can absorb___________________?
A. Only CO
B. Both CO and CO2
C. Both CO and O2
D. All CO, CO2, and O2
A gaseous fuel in order to develop luminosity on burning, must contain __________________?
A gaseous fuel in order to develop luminosity on burning, must contain __________________?
A. Carbon monoxide
B. Hydrocarbons
C. Hydrogen
D. Oxygen