A. 0
B. 100
C. In between 0 and 100
D. More than 100
Related Mcqs:
- Gross calorific value will be equal to the net calorific value for __________________?
A. H2
B. C2H2
C. CO
D. C2H6 - A gaseous fuel in order to develop luminosity on burning, must contain __________________?
A. Carbon monoxide
B. Hydrocarbons
C. Hydrogen
D. Oxygen - “Overfire burning” in a furnace is a phenomenon characterised by the __________________?
A. Supply of excess fuel
B. Supply of excess air
C. Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying
more air
D. None of these - Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________?
A. Calorific value
B. Higher C/H ratio
C. Sulphur content
D. Difference in gross & net calorific value - ombustion of pulverised coal compared to the lumpy coal __________________?
CA. Provides better control of furnace temperature
B. Facilitates combustion with lower excess air
C. Provides higher thermal efficiency & flame temperature
D. All A., B. & C. - Purity of coke means that, it is high in carbon and low in __________________?
A. Volatiles
B. Ash
C. Iron
D. Moisture - Preheating of coal charge for the coke ovens reduces the __________________?
A. Time of carbonisation
B. Yield of gas and tar
C. Fuel consumption in coking
D. All A., B. and C. - Compound coke ovens are those which can be heated by __________________?
A. Both steam and electrical power
B. Lean gas (e.g., B.F. gas)
C. Rich gas (e.g., coke oven gas)
D. Both B. and C. - Water gas constitutes mainly of __________________?
A. CO & H2
B. CO & N2
C. CO2 & H2
D. CH4 & H2 - Presence of force moisture in coal is most disadvantageous during its __________________?
A. Transportation and handling
B. Washing
C. Pulverisation
D. Storage
