A. Is friable, charcoal like substance
B. Has highest fixed carbon and lowest volatile matter content of all the four banded components
C. Is non-coking, but when blended with highly coking coal, controls its swelling and produces
high strength coke on carbonisation
D. All A., B. and C.
- A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?
- A. More B. Less C. Same D. Data insufficient; can’t be predicted...
- “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...
- High sulphur content in a fuel ______________ of the flue gases?
- A. Decreases the dew point B. Increases the dew point C. Reduces the combustion efficiency by limiting the permissible temperature reduction D. Both B. and C....
- A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that___________________?
- A. 21% excess air has been used for combustion B. 21% excess oxygen has been used for combustion C. Complete combustion of fuel has taken place D. No excess air has been used for combustion...
- Shatter index of the coke is a measure of its___________________?
- A. Strength B. Bulk density C. Reactivity D. None of these...