1. Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
2. High sulphur content in a fuel __________ of the flue gases.
3. Fusion point of coal ash generally varies from 1000 to 1700°C. Ash having fusion point less than __________ °C is liable to form clinker.
4. Coal tar fuel - 200 (CTF 200) is a mixture of
5. Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
6. Which of the following combustibles is absent in blast furnace gas?
7. Which of the following would require maximum amount of % excess air for complete combustion?
8. A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the reminder going to CO, the Orsat analysis in volume percent is
9. Calorific value of gobar gas (containing CH4 = 60%, H2 = 10%, CO2 = 30%) may be about __________ Kcal/Nm3.
10. Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
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